1978 GMC K15 Gear Boxes

Keep Your 1978 GMC K15 in Top Shape with Quality Gear Boxes

Whether you’re repairing or upgrading your Gear Box, using high-quality parts is key to keeping your 1978 GMC K15 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Steering Gear Box, Steering Gear Box Seals, and Steering Stabilizers. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Gear Boxes from Trusted Brands

Looking for a reliable Gear Box? We’ve got you covered with options from brands you know and trust like Monroe and Rancho. For example, Monroe Gear Boxes start at just $71.99 with an average 4.4 star rating. Rancho offer similar pricing and quality, backed by strong customer feedback. With over 64 reviews and a solid 5 star average, you can shop with confidence knowing other GMC K15 owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 GMC K15 Gear Box at Advance Auto Parts is around $217.49, with a range that starts at $52.99 and goes up to $549.99. With 10 options in stock from 6 trusted brands, finding the right fit is easy. Popular picks like Steering Damper RS5000, Remanufactured Steering Gear, and Steering Gear Major Seal Kit start at just $52.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Gear Box, don’t forget to check out other key components like Ball Joints and Steering Dampers. At Advance Auto Parts, we’re here to help you keep your 1978 GMC K15 in peak condition, inside and out.

Essential 1978 GMC K15 Gear Boxes

Powercraft – Steering Gear Major Seal Kit (Part No.7859)

Steering Gear Major Seal Kit

from

$52.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
See More

Cardone – Remanufactured Steering Gear (Part No.27-7502)

Remanufactured Steering Gear

from

$226.99
The steering gear box is the heart of the vehicle’s steering system. It guides the wheels’ movement in conjunction with the direction that the steering wheel is rotated, helping achieve ideal steering response for more efficient driving. CARDONE Remanufactured Steering Gear Boxes are re-engineered, built and tested to match O.E. performance. E ach unit features 100 percent new O-rings and lip seals to ensure leak-free, long-lasting performance. Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life. All units are 100 percent hydraulically tested to ensure perfect fit and function.

Product Features:
  • 100 percent hydraulic testing measures for proper flow, leakage and performance to ensure perfect fit and function.
  • 100 percent new O-rings and lip seals ensure leak-free, long-lasting performance.
  • All critical components are tested to ensure product reliability.
  • Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life.
  • Rust inhibitive “Cool Dip” finish is a penetrating dye that completely covers all exposed surfaces for a consistent, protective finish that will not crack, flake or peel.
  • As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
  • Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80 percent.
See More

Lares – Remanufactured Power Steering Gear Box (Part No.1249)

Remanufactured Power Steering Gear Box

from

$346.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More

Lares – Power Steering Gear Box (Part No.10959)

Power Steering Gear Box

from

$549.99
Power Steering Gear Box

Lares – Power Steering Gear Box (Part No.11249)

Power Steering Gear Box

from

$549.99
Power Steering Gear Box

Lares – Remanufactured Power Steering Gear Box (Part No.959)

Remanufactured Power Steering Gear Box

from

$344.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More

Cardone – Remanufactured Steering Gear (Part No.27-7513)

Remanufactured Steering Gear

from

$205.99
The steering gear box is the heart of the vehicle’s steering system. It guides the wheels’ movement in conjunction with the direction that the steering wheel is rotated, helping achieve ideal steering response for more efficient driving. CARDONE Remanufactured Steering Gear Boxes are re-engineered, built and tested to match O.E. performance. E ach unit features 100 percent new O-rings and lip seals to ensure leak-free, long-lasting performance. Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life. All units are 100 percent hydraulically tested to ensure perfect fit and function.

Product Features:
  • 100 percent hydraulic testing measures for proper flow, leakage and performance to ensure perfect fit and function.
  • 100 percent new O-rings and lip seals ensure leak-free, long-lasting performance.
  • All critical components are tested to ensure product reliability.
  • Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life.
  • Rust inhibitive “Cool Dip” finish is a penetrating dye that completely covers all exposed surfaces for a consistent, protective finish that will not crack, flake or peel.
  • As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
  • Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80 percent.
See More

Skyjacker – Dual Stab Kt: Silver W/Bk Bo (Part No.9220)

Dual Stab Kt: Silver W/Bk Bo

from

$253.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Rancho – Steering Damper RS5000 (Part No.RS5404)

Steering Damper RS5000

from

$93.99
Ideal for off-road driving, towing and street applications, Rancho RS5000 steering stabilizers enhance a vehicle’s performance and minimize on-road and off-road driver fatigue by reducing wheel shimmy, bump steer and vibration.

Product Features:
  • IMPROVED HANDLING AND PERFORMANCE – Reduces wheel shimmy, bump steer and vibration which helps minimize on-road or off-road driver fatigue
  • ACCOMMODATES LARGER TIRES – Engineered for vehicles with oversized wheels and tires
  • ENGINEERED TO LAST – Features protective boot to safeguard shock rod and oil seal
  • HANDLES EXTREME TEMPERATURE CHANGES – Twin-tube cellular gas design filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248 degree F
  • BUY WITH CONFIDENCE – Comes with Rancho’s Limited Warranty
See More

Skyjacker – Dual Stab Kt: White W/Red Bo (Part No.7220)

Dual Stab Kt: White W/Red Bo

from

$253.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Monroe – Magnum Steering Damper (Part No.SC2913)

Magnum Steering Damper

from

$71.99
Designed for trucks, vans, and SUVs, and CUVs, the Monroe Magnum steering stabilizer helps reduce vibrations that travel through the steering system before they get to the driver, improving control and driver fatigue in all driving conditions.

Product Features:
  • REDUCES VIBRATION – Ideal for trucks, vans, SUVs, and CUVs, it helps reduce vibrations that travel through the steering system before they get to the driver to improve control and cut down on driver fatigue in all driving conditions
  • CONSISTENT PERFORMANCE – All-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown
  • STRONG AND DURABLE – Sintered iron piston and .50-in. nitrocarburized piston rod for enhanced durability and long service life
  • EXCEPTIONAL HANDLING – Full displaced valving delivers better valving range on both compression and extension cycles for consistent performance
  • LONGER SERVICE LIFE – Self-lubricating fluid seal retains gas without excessive wear or friction
  • MOUNTS HORIZONATALLY – Micro-cellular gas design allows the unit to be mounted horizontally without impacting performance for improved steering control
See More

Skyjacker – Dual, Black Body, With Mounting Brackets/ Installation Hardware, Set Of 2 (Part No.8220)

Dual, Black Body, With Mounting Brackets/ Installation Hardware, Set Of 2

from

$253.99
Skyjacker(R) Steering Stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands.

Product Features:
  • Made From Premium Materials
  • Meets The Highest Quality Standards
  • It Dampens Out The Harshness Of The Highway
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level
  • Easy Installation
  • Reduce Physical Strength Handling Larger Tires
  • Black
See More

Skyjacker – Heavy Duty Oem, Single, Silver With Black Boot, Mounts To OE Locations (Part No.9000)

Heavy Duty Oem, Single, Silver With Black Boot, Mounts To OE Locations

from

$90.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Inexpensive And Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Most Popular Steering Gear Box for 1978 GMC K15s

Enhance your 1978 GMC K15 with one of the 3 Steering Gear Box we have in stock, starting at just $205.99.

Cardone – Remanufactured Steering Gear (Part No.27-7513)

Remanufactured Steering Gear

from

$205.99
The steering gear box is the heart of the vehicle’s steering system. It guides the wheels’ movement in conjunction with the direction that the steering wheel is rotated, helping achieve ideal steering response for more efficient driving. CARDONE Remanufactured Steering Gear Boxes are re-engineered, built and tested to match O.E. performance. E ach unit features 100 percent new O-rings and lip seals to ensure leak-free, long-lasting performance. Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life. All units are 100 percent hydraulically tested to ensure perfect fit and function.

Product Features:
  • 100 percent hydraulic testing measures for proper flow, leakage and performance to ensure perfect fit and function.
  • 100 percent new O-rings and lip seals ensure leak-free, long-lasting performance.
  • All critical components are tested to ensure product reliability.
  • Shafts are surfaced to precise specifications to eliminate premature seal wear and extend gear life.
  • Rust inhibitive “Cool Dip” finish is a penetrating dye that completely covers all exposed surfaces for a consistent, protective finish that will not crack, flake or peel.
  • As a remanufactured Original Equipment part, this unit guarantees a perfect vehicle fit.
  • Our remanufacturing process is earth-friendly, as it reduces the energy and raw material needed to make a new part by 80 percent.
See More

Lares – Remanufactured Power Steering Gear Box (Part No.1249)

Remanufactured Power Steering Gear Box

from

$346.99
Power Steering Gears are thoroughly cleaned and exterior surfaces reconditioned for like-new look. Each component is carefully inspected and replaced if not to OE tolerances. All seals and O-rings are replaced with OE equivalent parts. Each unit is tested to insure OE performance. Painted with a high quality paint. All units are carefully packaged to insure safe arrival at your door. Remanufactured in the USA.
See More

Lares – Power Steering Gear Box (Part No.11249)

Power Steering Gear Box

from

$549.99
Power Steering Gear Box

Best-Selling 1978 GMC K15 Steering Gear Box Seal

Upgrade your K15 with our best-selling Steering Gear Box Seal.

Powercraft – Steering Gear Major Seal Kit (Part No.7859)

Steering Gear Major Seal Kit

from

$52.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
See More

Top-Quality Steering Stabilizers for 1978 GMC K15s

Choose a high-quality OEM or aftermarket Steering Stabilizer for GMC K15s and enjoy top-notch performance from $71.99.

Monroe – Magnum Steering Damper (Part No.SC2913)

Magnum Steering Damper

from

$71.99
Designed for trucks, vans, and SUVs, and CUVs, the Monroe Magnum steering stabilizer helps reduce vibrations that travel through the steering system before they get to the driver, improving control and driver fatigue in all driving conditions.

Product Features:
  • REDUCES VIBRATION – Ideal for trucks, vans, SUVs, and CUVs, it helps reduce vibrations that travel through the steering system before they get to the driver to improve control and cut down on driver fatigue in all driving conditions
  • CONSISTENT PERFORMANCE – All-weather fluid contains special additives to assist with extreme temperatures and help reduce oil breakdown
  • STRONG AND DURABLE – Sintered iron piston and .50-in. nitrocarburized piston rod for enhanced durability and long service life
  • EXCEPTIONAL HANDLING – Full displaced valving delivers better valving range on both compression and extension cycles for consistent performance
  • LONGER SERVICE LIFE – Self-lubricating fluid seal retains gas without excessive wear or friction
  • MOUNTS HORIZONATALLY – Micro-cellular gas design allows the unit to be mounted horizontally without impacting performance for improved steering control
See More

Rancho – Steering Damper RS5000 (Part No.RS5404)

Steering Damper RS5000

from

$93.99
Ideal for off-road driving, towing and street applications, Rancho RS5000 steering stabilizers enhance a vehicle’s performance and minimize on-road and off-road driver fatigue by reducing wheel shimmy, bump steer and vibration.

Product Features:
  • IMPROVED HANDLING AND PERFORMANCE – Reduces wheel shimmy, bump steer and vibration which helps minimize on-road or off-road driver fatigue
  • ACCOMMODATES LARGER TIRES – Engineered for vehicles with oversized wheels and tires
  • ENGINEERED TO LAST – Features protective boot to safeguard shock rod and oil seal
  • HANDLES EXTREME TEMPERATURE CHANGES – Twin-tube cellular gas design filled with all-weather fluid allows for cooler operation, increased vehicle control and ability to withstand internal temperatures of -40 to 248 degree F
  • BUY WITH CONFIDENCE – Comes with Rancho’s Limited Warranty
See More

Skyjacker – Dual Stab Kt: Silver W/Bk Bo (Part No.9220)

Dual Stab Kt: Silver W/Bk Bo

from

$253.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Skyjacker – Dual, Black Body, With Mounting Brackets/ Installation Hardware, Set Of 2 (Part No.8220)

Dual, Black Body, With Mounting Brackets/ Installation Hardware, Set Of 2

from

$253.99
Skyjacker(R) Steering Stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands.

Product Features:
  • Made From Premium Materials
  • Meets The Highest Quality Standards
  • It Dampens Out The Harshness Of The Highway
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level
  • Easy Installation
  • Reduce Physical Strength Handling Larger Tires
  • Black
See More

Skyjacker – Dual Stab Kt: White W/Red Bo (Part No.7220)

Dual Stab Kt: White W/Red Bo

from

$253.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Skyjacker – Heavy Duty Oem, Single, Silver With Black Boot, Mounts To OE Locations (Part No.9000)

Heavy Duty Oem, Single, Silver With Black Boot, Mounts To OE Locations

from

$90.99
Skyjacker(R) steering stabilizer, A steering stabilizer is a dampening shock for your steering system. It dampens out the harshness of the highway, the shimmy from running the additional weight of larger tires and wheels and places control back into the driver hands. Stabilizers also reduce the fatigue of the driver on a personal level by reducing the amount of physical strength it takes to guide those larger tires on and off the road. Changing the weak stock unit for a better performing replacement or adding dual steering stabilizers is an inexpensive but worthy investment

Product Features:
  • Skyjacker(R) Steering Stabilizer Is A Dampening Shock For Your Steering System
  • Stabilizer Dampens Out The Harshness Of The Highway, The Shimmy From Running The Additional Weight Of Larger Tires And Wheels And Places Control Back Into The Driver Hands
  • Stabilizers Also Reduce The Fatigue Of The Driver On A Personal Level By Reducing The Amount Of Physical Strength It Takes To Guide Those Larger Tires On And Off The Road
  • Changing The Weak Stock Unit For A Better Performing Replacement Or Adding Dual Steering Stabilizers Is An Inexpensive But Worthy Investment
  • Inexpensive And Worthy Investment
  • Reduce Physical Strength Handling Larger Tires
See More

Top-Rated Gear Box Brands For Your 1978 GMC K15

When it comes to finding the perfect Gear Box for your 1978 GMC K15, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 6 trusted brands. We carry the most popular Gear Box brands including Monroe and Rancho, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $71.99. Purchasing a Gear Box from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC K15, providing peace of mind with parts that meet or exceed OEM standards.

Popular Monroe 1978 GMC K15 Gear Boxes

If you’re looking for a top-quality Gear Box for your 1978 GMC K15, Advance Auto Parts has exactly what you need with our selection of Monroe Gear Boxes. We have 1 Monroe Gear Boxes in stock for this fitment, all known for their durability and precision fit. With prices starting at just $71.99, you’ll find the perfect Gear Box for your needs and budget. Monroe Gear Boxes for the 1978 GMC K15 come highly rated, with over 9 customer reviews and an impressive average rating of 4.4 stars. Choosing a Monroe Gear Box from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Magnum Steering Damper
from $71.99
(9)
Magnum Steering Damper
“My old 4 wheel drive began having erratic steering issues, replaced the steering dampner and cured the problem.”

Top-Quality Rancho 1978 GMC K15 Gear Boxes

For those in search of a high-quality Gear Box for their 1978 GMC K15, Advance Auto Parts offers a great selection of Rancho Gear Boxes. With 1 Rancho Gear Boxes in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Gear Boxes start at just $93.99, giving you a range of options to suit your budget. Backed by over 4 customer ratings and an average rating of 4.1 stars, Rancho Gear Boxes provide both reliability and excellent performance. Choosing a Rancho Gear Box from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Steering Damper RS5000
from $93.99
(4)
Steering Damper RS5000
“I wanted to install a dual stabilizer setup, but decided to try this single Rancho stabilizer first. It is significantly larger than the original ste”

FAQs for 1978 GMC K15 Gear Boxes

What are the best-selling Gear Boxes for 1978 GMC K15s?

Out of 10 Gear Boxes that fit 1978 GMC K15s, the following parts are the top sellers:

What’s the price range for 1978 GMC K15 Gear Boxes?

The prices of Gear Boxes for the 1978 GMC K15 range from $52.99 up to $549.99 for the most premium parts.

What is the average price of a Gear Box for a 1978 GMC K15?

The average price for Gear Boxes for the 1978 GMC K15 is $217.49. Keep in mind the variety of part types within our Gear Box category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Gear Boxes for other GMC K15 model years?

Yes, we carry Gear Boxes for 2 model years of GMC K15s between 1975 and 1977. The following model years are the most popular for Gear Box purchases: 1977, 1976, and 1975.

What are the cheapest Gear Boxes for my 1978 GMC K15?

The cheapest 1978 GMC K15 Gear Boxes we carry are:

Does Advance Auto Parts sell Gear Boxes for any other 1978 GMC models?

Yes. We stock Gear Boxes for 12 other popular 1978 GMC models. Some of the most popular are 1978 Jimmy Gear Boxes, 1978 Caballero Gear Boxes, 1978 K25 Gear Boxes, 1978 G25 Gear Boxes, and 1978 C25 Gear Boxes.

What are the top-rated Gear Boxes that fit the 1978 GMC K15?

Based on 64 reviews by customers, our 1978 GMC K15 Gear Boxes have an average customer rating of 5 stars. These are the highest-rated categories of Gear Boxes for the 1978 GMC K15 and their top-rated products:

What types of Gear Boxes do you sell for my 1978 GMC K15?

As of 11/2/25, these are some of the most in-demand types of Gear Boxes for a 1978 GMC K15:

Can I get help with 1978 GMC K15 Gear Box orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Gear Boxes and more.

What is your return policy for GMC K15 Gear Boxes?

Advance Auto Parts keeps returns simple. For new GMC K15 Gear Boxes and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.