1978 GMC C15 Gear Boxes
Keep Your 1978 GMC C15 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 C15 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Steering Gear Box Seals, Steering Stabilizers, and Steering Gear Box. 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 National. For example, National Gear Boxes start at just $9.99 with an average 4.3 star rating. With over 204 reviews and a solid 3 star average, you can shop with confidence knowing other GMC C15 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1978 GMC C15 Gear Box at Advance Auto Parts is around $227.49, with a range that starts at $9.99 and goes up to $547.99. With 8 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like Remanufactured Steering Gear, Steering Gear Major Seal Kit, and Magnum Steering Damper 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 Idler Arms. At Advance Auto Parts, we’re here to help you keep your 1978 GMC C15 in peak condition, inside and out.
Find Your Specific 1978 GMC C15 Gear Boxes
Looking for the perfect Gear Box for your 1978 GMC C15? You’re in the right place. Below, you’ll find links to various types of Gear Boxes that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Gear Boxes, ensuring durability and a precise fit for your GMC C15. Whether you’re driving a 1978 model or another popular model year like
1975,
1976, and
1977, we’ve got you covered. Purchasing Gear Boxes from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Gear Boxes that fit your vehicle.
Essential 1978 GMC C15 Gear Boxes
Powercraft – Steering Gear Major Seal Kit (Part No.7859)
from
$52.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
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National – Multi-Purpose Seal (Part No.8871)
from
$9.99
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
Product Features:
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Product Features:
- Design type: springless; multi-lip
- Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
- Good low temperature capability
- Low swell in hydrocarbon fluids
- Delivers quality and reliable performance for every type of repair
Monroe – Magnum Steering Damper (Part No.SC2915)
from
$60.99
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:
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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
PWR – New Power Steering Gear (Part No.61-5191)
from
$825.99
Direct Fit – to make installation easy; All units are USA Engineering Approved; PWR Pumps, Racks, Gears & Reservoirs are 100% tested for leaks, pressure, noise and function.
Product Features:
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Product Features:
- PWR Power Steering Gear Boxes are 100% NEW and Engineered In North America
- All PWR products are Designed, Tier-Manufactured, and Multi-Tested to meet or exceed OE Performance and Durability Requirements
- PWR does not consolidate turn ratios, ensuring OE quality replacement performance
- Includes: NEW housings, internal components, ball bearings, shafts, bushings, and are precision machined and matched for optimum performance and duarability
- Features our EXCLUSIVE INDUSTRIAL GRADE PACKAGING, Input and Output Shaft Spilne Protectors, Sealed Heavy Duty Plastic Enclosures, and Fluid Port Caps
- Supplied with a New Output Shaft Nut and all required Installation Seals and Washers
Lares – Remanufactured Manual Steering Gear Box (Part No.855)
from
$261.99
Manual 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 filled with a high quality grease with a special polymer to reduce oil separation. 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.
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Lares – Remanufactured Power Steering Gear Box (Part No.1074)
from
$366.99
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 – Manual Steering Gear Box (Part No.10855)
from
$296.99
Manual Steering Gear Box
Cardone – Remanufactured Steering Gear (Part No.27-7512)
from
$209.99
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:
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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.
Lares – PS GEAR BOX-NEW (Part No.11074)
from
$547.99
PS GEAR BOX-NEW
Lares – Remanufactured Power Steering Gear Box (Part No.1248)
from
$378.99
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.11248)
from
$547.99
Power Steering Gear Box
Cardone – Remanufactured Steering Gear (Part No.27-7501)
from
$211.99
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:
See More
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.
Lares – PS GEAR-NEW (Part No.11075)
from
$621.99
PS GEAR-NEW
Popular 1978 GMC C15 Gear Boxes Categories
Most Popular Steering Gear Box Seals for 1978 GMC C15s
Enhance your 1978 GMC C15 with one of the 2 Steering Gear Box Seals we have in stock, starting at just $9.99.
National – Multi-Purpose Seal (Part No.8871)
from
$9.99
National has built a reputation as one of the most respected names in the industry. We have offered premium sealing solutions for more than 75 years. Our design team keeps pace with the industry and provides advanced solutions for today’s vehicles.
Product Features:
See More
Product Features:
- Design type: springless; multi-lip
- Temperature range: -40 Deg. F to 225 Deg. F / -40 Deg. C to 107 Deg. C
- Good low temperature capability
- Low swell in hydrocarbon fluids
- Delivers quality and reliable performance for every type of repair
Powercraft – Steering Gear Major Seal Kit (Part No.7859)
from
$52.99
Premium-quality parts for lasting repairs. Engineered to OE design and specifications.
See More
Best-Selling 1978 GMC C15 Steering Stabilizer
Upgrade your C15 with our best-selling Steering Stabilizer with a 2 Starts rating across 2 reviews.
Monroe – Magnum Steering Damper (Part No.SC2915)
from
$60.99
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:
See More
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
Top-Quality Steering Gear Box for 1978 GMC C15s
Choose a high-quality OEM or aftermarket Steering Gear Box for GMC C15s and enjoy top-notch performance from $209.99.
Cardone – Remanufactured Steering Gear (Part No.27-7512)
from
$209.99
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:
See More
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.
Lares – Remanufactured Power Steering Gear Box (Part No.1248)
from
$378.99
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 – Remanufactured Manual Steering Gear Box (Part No.855)
from
$261.99
Manual 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 filled with a high quality grease with a special polymer to reduce oil separation. 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.11248)
from
$547.99
Power Steering Gear Box
Lares – Manual Steering Gear Box (Part No.10855)
from
$296.99
Manual Steering Gear Box
Top-Rated Gear Box Brands For Your 1978 GMC C15
When it comes to finding the perfect Gear Box for your 1978 GMC C15, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 5 trusted brands. We carry the most popular Gear Box brands including National, and more, all known for their exceptional customer ratings (average brand rating of 4.3 stars) and competitive prices, as low as $9.99. Purchasing a Gear Box from us here at Advance Auto Parts is a smart move for both you and your 1978 GMC C15, providing peace of mind with parts that meet or exceed OEM standards.
Popular National 1978 GMC C15 Gear Boxes
If you’re looking for a top-quality Gear Box for your 1978 GMC C15, Advance Auto Parts has exactly what you need with our selection of National Gear Boxes. We have 1 National Gear Boxes in stock for this fitment, all known for their durability and precision fit. With prices starting at just $9.99, you’ll find the perfect Gear Box for your needs and budget. National Gear Boxes for the 1978 GMC C15 come highly rated, with over 15 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Gear Box from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
FAQs for 1978 GMC C15 Gear Boxes
What are the best-selling Gear Boxes for 1978 GMC C15s?
Out of 8 Gear Boxes that fit 1978 GMC C15s, the following parts are the top sellers:
- Remanufactured Steering Gear (5710944) – $209.99
- Steering Gear Major Seal Kit (3869059) – $52.99
- Magnum Steering Damper (18570675) – $60.99
What’s the price range for 1978 GMC C15 Gear Boxes?
The prices of Gear Boxes for the 1978 GMC C15 range from $9.99 up to $547.99 for the most premium parts.
What is the average price of a Gear Box for a 1978 GMC C15?
The average price for Gear Boxes for the 1978 GMC C15 is $227.49. 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 C15 model years?
What are the cheapest Gear Boxes for my 1978 GMC C15?
The cheapest 1978 GMC C15 Gear Boxes we carry are:
- Multi-Purpose Seal (3271501) – $9.99
- Steering Gear Major Seal Kit (3869059) – $52.99
- Magnum Steering Damper (18570675) – $60.99
- Remanufactured Steering Gear (5710944) – $209.99
- Remanufactured Manual Steering Gear Box (18490330) – $261.99
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 K15 Gear Boxes, and 1978 G25 Gear Boxes.
What are the top-rated Gear Boxes that fit the 1978 GMC C15?
Based on 204 reviews by customers, our 1978 GMC C15 Gear Boxes have an average customer rating of 3 stars. These are the highest-rated categories of Gear Boxes for the 1978 GMC C15 and their top-rated products:
- Steering Gear Box Seals
- Multi-Purpose Seal (3271501) – $9.99
- Steering Stabilizers
- Magnum Steering Damper (18570675) – $60.99
What types of Gear Boxes do you sell for my 1978 GMC C15?
As of 11/2/25, these are some of the most in-demand types of Gear Boxes for a 1978 GMC C15:
Can I get help with 1978 GMC C15 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 C15 Gear Boxes?
Advance Auto Parts keeps returns simple. For new GMC C15 Gear Boxes and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.