1977 GMC P25 Engine Timing Parts
Keep Your 1977 GMC P25 in Top Shape with Quality Engine Timing Parts
Whether you’re repairing or upgrading your Engine Timing Part, using high-quality parts is key to keeping your 1977 GMC P25 looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Timing Cam Gears, Timing Sets, and Timing Covers. 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 Engine Timing Parts from Trusted Brands
Looking for a reliable Engine Timing Part? We’ve got you covered with options from brands you know and trust like National. For example, National Engine Timing Parts start at just $12.49 with an average 4.3 star rating. With over 16 reviews and a solid 5 star average, you can shop with confidence knowing other GMC P25 owners approve.
Competitive Prices and Extensive Inventory
The average price for a 1977 GMC P25 Engine Timing Part at Advance Auto Parts is around $139.22, with a range that starts at $8.49 and goes up to $635.99. With 25 options in stock from 7 trusted brands, finding the right fit is easy. Popular picks like Engine Timing Chain, Engine Harmonic Balancer Kit, and Engine Timing Set start at just $22.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Timing Part, don’t forget to check out other key components like Camshafts and Engine Gaskets and Seals. At Advance Auto Parts, we’re here to help you keep your 1977 GMC P25 in peak condition, inside and out.
Find Your Specific 1977 GMC P25 Engine Timing Parts
Looking for the perfect Engine Timing Part for your 1977 GMC P25? You’re in the right place. Below, you’ll find links to various types of Engine Timing Parts that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Timing Parts, ensuring durability and a precise fit for your GMC P25. Whether you’re driving a 1977 model or another popular model year like
1975,
1976, and
1978, we’ve got you covered. Purchasing Engine Timing Parts 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 Engine Timing Parts that fit your vehicle.
Essential 1977 GMC P25 Engine Timing Parts
Cloyes Gear – Engine Timing Camshaft Sprocket (Part No.S390T)
from
$11.99
Sprocket Made From High Alloy Material. Features Precision Tooth Form To Assure Proper Chain Engagement, And Is Balanced For Proper Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Cloyes Gear – Engine Timing Camshaft Sprocket (Part No.S288)
from
$17.99
Sprocket Made From High Alloy Material. Features Precision Tooth Form To Assure Proper Chain Engagement, And Is Balanced For Proper Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Dorman – Timing Cover with Gasket and Seal (Part No.635-510)
from
$42.49
This direct replacement timing cover matches the fit and function of the original equipment cover for a reliable repair. This part has undergone extensive testing to ensure adherence to precise design standards.
Product Features:
See More
Product Features:
- Direct replacement – this engine timing cover matches the fit and function of the original equipment cover
- Durable construction – this part is specifically designed to withstand extreme underhood temperatures for a long service life
- Cost-effective solution – offers original equipment quality at a competitive price
- Quality tested – this part has undergone extensive testing to ensure a quality fit and long service life
Cloyes Gear – Engine Timing Chain (Part No.C499)
from
$22.99
Since 1921, Cloyes has been the trusted leader in automotive timing systems. Our timing chains are built to synchronize crankshaft and camshaft rotation with absolute accuracy, ensuring precise valve timing and long-term engine performance. Available as stand-alone chains or in complete kits, Cloyes timing chains are manufactured from premium materials, heat-treated, pre-stressed and engineered for a perfect chain-to-sprocket tooth fit – delivering quiet operation, durability, and OE-level performance you can count on. To ensure total timing system integrity, Cloyes recommends replacing the chain along with the tensioners, guides, and sprockets during service. Trusted by professionals for over a century & backed by an industry-leading limited Warranty and technical support.
Product Features:
See More
Product Features:
- Pre-stressed and heat-treated steel construction for increased strength, and wear resistance, delivering long-term durability even in high-stress environments
- Cloyes chains are engineered and manufactured with precision pitch control to ensure optimal chain-to-sprocket fit reducing noise, minimizing fatigue, and maintaining accurate timing
- Designed in the USA and manufactured using premium materials for OE-level fit and function, allowing for smooth installation and reliable performance
- Each part is extensively tested for function, fitment, and durability to ensure consistent quality and optimal performance, reducing the risk of comebacks
- Available in application-specific kit or as a stand-alone chain, offering installation flexibility and convenience
- Backed by Limited Lifetime Warranty and over 100 years in engineering leadership with unmatched technical support and repair confidence in every component
INA US – ENGINE TIMING CHAIN (Part No.ZC-C499)
from
$32.99
ENGINE TIMING CHAIN
INA US – ENGINE TIMING CHAIN (Part No.ZC-C163)
from
$29.99
ENGINE TIMING CHAIN
INA US – ENG TIMING GEAR SET (Part No.ZC-2528S)
from
$111.99
ENG TIMING GEAR SET
Cloyes Gear – Engine Timing Set (Part No.C-3023K)
from
$44.99
Utilizes the latest in design and technology to offer complete chain sets. CAD designed and manufactured using premium materials. Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance. Utilizes the latest in design and technology to offer complete chain sets. Refer to our online catalog for detailed application-specific information. SET INCLUDES: C163 Engine Timing Chain (1 EA), S289 Engine Timing Crankshaft Sprocket (1 EA), S288 Engine Timing Camshaft Sprocket (1 EA).
Product Features:
See More
Product Features:
- Timing Set includes all components for a quick and efficient replacement
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Utilizes the latest in design and technology to offer complete chain sets
- Refer to our online catalog for detailed application-specific information
INA US – ENGINE TIMING SET (Part No.ZC-78300)
from
$95.99
ENGINE TIMING SET
National – Engine Harmonic Balancer Repair Sleeve (Part No.88176)
from
$18.79
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:
- Made of stainless steel
- Designed to prevent timing cover seal leaks
- Takes up gaps caused by worn-out harmonic balancer shafts
National – Engine Harmonic Balancer Kit (Part No.5000)
from
$28.99
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:
- Includes timing cover seal and harmonic balancer sleeve
- Solves the oil leaking around timing cover seal
- Made of stainless steel
- Takes up gaps caused by worn-out harmonic balancer shafts
National – Multi-Purpose Seal (Part No.3638)
from
$12.49
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: spring loaded; single-lip
- Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
- Resistance to EP lubricants
- Low swell in hydrocarbon fluids
- Delivers quality and reliable performance for every type of repair
MAHLE Original – Engine Timing Cover Seal (Part No.65022)
from
$15.99
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.
Product Features:
See More
Product Features:
- All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
- MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
- MAHLE gaskets is the leader in Domestic, Asian and European applications
- The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
Cloyes Gear – Engine Timing Crankshaft Gear (Part No.2527)
from
$25.99
Gear Made From High Alloy Material. Features “Helical” Tooth Form For Quiet Operation, And Precision Machined Bore For True Fit.”
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain gears offer reliability and dependability for engine rebuilds and typical replacement jobs
- Helical tooth form for quiet operation and precision machined bore for true fit
- CAD designed and manufactured using premium materials to ensure optimal performance
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Cloyes Gear – Engine Timing Crankshaft Sprocket (Part No.S289)
from
$12.99
Sprocket Made From High Alloy Material. Sprocket Teeth Are Heat Treated. Precision Tooth Form To Assure Proper Chain Engagement, And Precise Keyway To Tooth Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Cloyes Gear – Engine Timing Crankshaft Sprocket (Part No.S391)
from
$8.49
Sprocket Made From High Alloy Material. Sprocket Teeth Are Heat Treated. Precision Tooth Form To Assure Proper Chain Engagement, And Precise Keyway To Tooth Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
INA US – ENGINE TIMING SET (Part No.ZC-C-3023K)
from
$48.99
ENGINE TIMING SET
Popular 1977 GMC P25 Engine Timing Parts Categories
Most Popular Timing Cam Gears for 1977 GMC P25s
Enhance your 1977 GMC P25 with one of the 2 Timing Cam Gears we have in stock, starting at just $11.99.
Cloyes Gear – Engine Timing Camshaft Sprocket (Part No.S390T)
from
$11.99
Sprocket Made From High Alloy Material. Features Precision Tooth Form To Assure Proper Chain Engagement, And Is Balanced For Proper Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Cloyes Gear – Engine Timing Camshaft Sprocket (Part No.S288)
from
$17.99
Sprocket Made From High Alloy Material. Features Precision Tooth Form To Assure Proper Chain Engagement, And Is Balanced For Proper Timing.
Product Features:
See More
Product Features:
- Featuring precision-tooled or machined tooth form and precision-machined bore for true fit, timing chain sprockets offer reliability and dependability for engine rebuilds and typical replacement jobs
- Recommended that the chain tensioner(s), sprocket(s), and guide(s) also be replaced when the chain is replaced, as these components play a vital role in system stability and accurate timing
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Refer to our online catalog for detailed application-specific information
Best-Selling 1977 GMC P25 Timing Sets
Upgrade your P25 with one of our 4 best-selling Timing Sets.
Cloyes Gear – Engine Timing Set (Part No.C-3001K)
from
$27.99
Utilizes the latest in design and technology to offer complete chain sets. CAD designed and manufactured using premium materials. Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance. Utilizes the latest in design and technology to offer complete chain sets. Refer to our online catalog for detailed application-specific information. SET INCLUDES: S390T Engine Timing Camshaft Sprocket (1 EA), S391 Engine Timing Crankshaft Sprocket (1 EA), C499 Engine Timing Chain (1 EA).
Product Features:
See More
Product Features:
- Timing Set includes all components for a quick and efficient replacement
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Utilizes the latest in design and technology to offer complete chain sets
- Refer to our online catalog for detailed application-specific information
Cloyes Gear – Engine Timing Set (Part No.C-3023K)
from
$44.99
Utilizes the latest in design and technology to offer complete chain sets. CAD designed and manufactured using premium materials. Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance. Utilizes the latest in design and technology to offer complete chain sets. Refer to our online catalog for detailed application-specific information. SET INCLUDES: C163 Engine Timing Chain (1 EA), S289 Engine Timing Crankshaft Sprocket (1 EA), S288 Engine Timing Camshaft Sprocket (1 EA).
Product Features:
See More
Product Features:
- Timing Set includes all components for a quick and efficient replacement
- CAD designed and manufactured using premium materials
- Each part is extensively tested and measured for function, fitment, and durability to ensure optimal performance
- Utilizes the latest in design and technology to offer complete chain sets
- Refer to our online catalog for detailed application-specific information
INA US – ENG TIMING GEAR SET (Part No.ZC-2528S)
from
$111.99
ENG TIMING GEAR SET
INA US – ENGINE TIMING SET (Part No.ZC-78300)
from
$95.99
ENGINE TIMING SET
Top-Quality Timing Covers for 1977 GMC P25s
Choose a high-quality OEM or aftermarket Timing Cover for GMC P25s and enjoy top-notch performance from $42.49.
Dorman – Timing Cover with Gasket and Seal (Part No.635-510)
from
$42.49
This direct replacement timing cover matches the fit and function of the original equipment cover for a reliable repair. This part has undergone extensive testing to ensure adherence to precise design standards.
Product Features:
See More
Product Features:
- Direct replacement – this engine timing cover matches the fit and function of the original equipment cover
- Durable construction – this part is specifically designed to withstand extreme underhood temperatures for a long service life
- Cost-effective solution – offers original equipment quality at a competitive price
- Quality tested – this part has undergone extensive testing to ensure a quality fit and long service life
Top Picks for 1977 GMC P25 Timing Cover Seals
Invest in one of our 3 durable Timing Cover Seals for your 1977 GMC, knowing you’re getting trusted brands and expert craftsmanship.
National – Multi-Purpose Seal (Part No.3638)
from
$12.49
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: spring loaded; single-lip
- Temperature range: -20 Deg. F to 300 Deg. F / -29 Deg. C to 49 Deg. C
- Resistance to EP lubricants
- Low swell in hydrocarbon fluids
- Delivers quality and reliable performance for every type of repair
National – Engine Harmonic Balancer Kit (Part No.5000)
from
$28.99
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:
- Includes timing cover seal and harmonic balancer sleeve
- Solves the oil leaking around timing cover seal
- Made of stainless steel
- Takes up gaps caused by worn-out harmonic balancer shafts
MAHLE Original – Engine Timing Cover Seal (Part No.65022)
from
$15.99
MAHLE® gaskets provide world class sealing products trusted by OEMs & Technicians around the globe.
Product Features:
See More
Product Features:
- All MAHLE gaskets meet or exceed the original equipment specifications providing the finest sealing products available
- MAHLE gaskets utilizes OE equivalent or better materials in all our gaskets
- MAHLE gaskets is the leader in Domestic, Asian and European applications
- The contents of MAHLE gaskets are packaged in shrink wrapped tray, giving you the added security of knowing that you have the right parts, prior to opening the package
Our Engine Timing Chain Kits for 1977 GMC P25s
Make a smart move for your 1977 GMC P25 with our Engine Timing Chain Kit for $48.99.
INA US – ENGINE TIMING SET (Part No.ZC-C-3023K)
from
$48.99
ENGINE TIMING SET
Top-Rated Engine Timing Part Brands For Your 1977 GMC P25
When it comes to finding the perfect Engine Timing Part for your 1977 GMC P25, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 7 trusted brands. We carry the most popular Engine Timing Part 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 $12.49. Purchasing a Engine Timing Part from us here at Advance Auto Parts is a smart move for both you and your 1977 GMC P25, providing peace of mind with parts that meet or exceed OEM standards.
Popular National 1977 GMC P25 Engine Timing Parts
If you’re looking for a top-quality Engine Timing Part for your 1977 GMC P25, Advance Auto Parts has exactly what you need with our selection of National Engine Timing Parts. We have 2 National Engine Timing Parts in stock for this fitment, all known for their durability and precision fit. With prices starting at just $12.49 and an average cost of $15.64, you’ll find the perfect Engine Timing Part for your needs and budget. National Engine Timing Parts for the 1977 GMC P25 come highly rated, with over 8 customer reviews and an impressive average rating of 4.3 stars. Choosing a National Engine Timing Part from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
from
$12.49
(3)
Multi-Purpose Seal
“I hate doubts whether or not this seal would fit, the professionals at my local store assured me it would, It Did”
FAQs for 1977 GMC P25 Engine Timing Parts
What are the best-selling Engine Timing Parts for 1977 GMC P25s?
Out of 25 Engine Timing Parts that fit 1977 GMC P25s, the following parts are the top sellers:
- Engine Timing Chain (12152772) – $22.99
- Engine Harmonic Balancer Kit (18444501) – $28.99
- Engine Timing Set (12149403) – $27.99
What’s the price range for 1977 GMC P25 Engine Timing Parts?
The prices of Engine Timing Parts for the 1977 GMC P25 range from $8.49 up to $635.99 for the most premium parts.
What is the average price of an Engine Timing Part for a 1977 GMC P25?
The average price for Engine Timing Parts for the 1977 GMC P25 is $139.22. Keep in mind the variety of part types within our Engine Timing Part category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Timing Parts for other GMC P25 model years?
What are the cheapest Engine Timing Parts for my 1977 GMC P25?
The cheapest 1977 GMC P25 Engine Timing Parts we carry are:
- Engine Timing Crankshaft Sprocket (12154850) – $8.49
- Engine Timing Camshaft Sprocket (12154856) – $11.99
- Multi-Purpose Seal (3268020) – $12.49
- Engine Timing Crankshaft Sprocket (12153003) – $12.99
- Engine Timing Cover Seal (11155889) – $15.99
Does Advance Auto Parts sell Engine Timing Parts for any other 1977 GMC models?
Yes. We stock Engine Timing Parts for 13 other popular 1977 GMC models. Some of the most popular are 1977 Jimmy Engine Timing Parts, 1977 K25 Engine Timing Parts, 1977 K15 Engine Timing Parts, 1977 G25 Engine Timing Parts, and 1977 C25 Engine Timing Parts.
What are the top-rated Engine Timing Parts that fit the 1977 GMC P25?
The one 1977 GMC P25 Engine Timing Part we have in stock is the Engine Timing Crankshaft Sprocket. It costs $8.49.
What types of Engine Timing Parts do you sell for my 1977 GMC P25?
As of 3/1/26, these are some of the most in-demand types of Engine Timing Parts for a 1977 GMC P25:
Can I get help with 1977 GMC P25 Engine Timing Part orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about GMC Engine Timing Parts and more.
What is your return policy for GMC P25 Engine Timing Parts?
Advance Auto Parts keeps returns simple. For new GMC P25 Engine Timing Parts and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.