Original GM Engine Parts

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What are All the Main Parts of an Engine?

There are many. The list includes everything from intake and exhaust valves, pistons, and spark plugs to valve covers, a camshaft, a crankshaft, and a cylinder head. They work with drive shafts and a transmission, plus an oil pan or sump. Parts like gears, bearings, sprockets, and rings ensure the engine not only fits together properly but also runs right.

What Does Each Part of an Engine Do?

The intake valves regulate the ratio of air to fuel in the engine, the pistons pressurize it, the spark plugs ignite it, helping to crank (i.e., start) the engine, and exhaust valves regulate the fumes. Valve covers protect the valves, while the camshaft helps make sure the latter open and close the way they should. The cylinder head helps keep gases and oil from leaking.

The crankshaft, however, transforms engine power into rotation -- motion that the drive shafts and transmission use to turn a vehicle's wheels and spin its tires. The oil pan or oil sump stores motor oil, which the engine uses to lubricate everything.

What are the Signs of an Engine or its Parts Going Out?

They range widely. Look for dashboard warnings, like Check Engine, abnormally high exhaust emissions, a drop in fuel efficiency, and problems accelerating. Your vehicle may also take longer than usual to warm up, it may idle roughly or stall, or you may not be able to start it at all.

If you see any of them, do an engine inspection. Replace any parts needed.

Why Buy Genuine OEM Engine Parts?

They're designed to work with your brand's models right from the start, guaranteed. It follows that they'll fit what you drive.

Where Can I Order Replacement Engine Parts?

Our online store. Finding what you need in our catalog is easy. Just browse by your make, model, and year. Buy now and we'll ship and deliver fast, directly to your door.

Engine Camshaft
Part Number: 12604896
Other Names: Camshaft, Valve Cover More Names
MSRP $150.61 CAD
$102.73 CAD
MSRP $150.61 CAD
$102.73 CAD
Engine Camshaft
Part Number: 12703806
Other Names: Camshaft, Overhead Valve Camshaft More Names
Replaces: 12568989
Description: Express, savana. All models. Astro, Safari. S-series. Vin. x. Silverado, sierra. More Info
MSRP $412.32 CAD
$281.25 CAD
MSRP $412.32 CAD
$281.25 CAD
Engine Camshaft
Part Number: 12689035
Other Names: Camshaft, Overhead Valve Camshaft More Names
Replaces: 12593205, 12625437
Description: Express, savana. 4.8l. Silverado, sierra. 4.8l. Canyon, Colorado. Tahoe, Yukon, Escalade. 4.8l. More Info
MSRP $205.11 CAD
$139.90 CAD
MSRP $205.11 CAD
$139.90 CAD
Camshaft
Part Number: 12664912
Other Names: Overhead Valve Camshaft More Names
Description: Silverado, sierra. Escalade ESV. More Info
MSRP $240.60 CAD
$164.08 CAD
MSRP $240.60 CAD
$164.08 CAD
Valve Cover
Part Number: 55581593
Other Names: Engine Camshaft Housing More Names
Description: 2.0L turbo diesel. Cruze. More Info
MSRP $198.96 CAD
$135.70 CAD
MSRP $198.96 CAD
$135.70 CAD
Engine Valve Cover Grommet
Part Number: 96353007
Other Names: Camshaft Cover Washer More Names
MSRP $5.66 CAD
$4.01 CAD
MSRP $5.66 CAD
$4.01 CAD
Engine Camshaft
Part Number: 12625436
Other Names: Camshaft More Names
Replaces: 12593207
Description: Silverado, sierra. 5.3l. Tahoe, Yukon, Escalade. 5.3l. Yukon XL, Suburban. 5.3l. Avalanche. 5.3l. All models. LaCrosse. Impala, Monte... More Info
MSRP $475.55 CAD
$324.31 CAD
MSRP $475.55 CAD
$324.31 CAD
Engine Camshaft
Part Number: 12625439
Other Names: Camshaft More Names
Replaces: 12612274
Description: Express, savana. 6.0l. Yukon XL, Suburban. 6.0l. More Info
MSRP $546.31 CAD
$372.57 CAD
MSRP $546.31 CAD
$372.57 CAD
Engine Camshaft
Part Number: 12626660
Other Names: Camshaft More Names
Description: Silverado, sierra. Express, savana. 6.0l. Suburban 3500hd. More Info
MSRP $163.58 CAD
$111.57 CAD
MSRP $163.58 CAD
$111.57 CAD
Engine Camshaft
Part Number: 12629512
Other Names: Camshaft More Names
Description: Escalade ESV. Sierra, silverado. 6.2l. Yukon XL. 6.2l. Corvette. Without z06. Tahoe. 6.2l. Suburban. 6.2l. More Info
MSRP $241.37 CAD
$164.59 CAD
MSRP $241.37 CAD
$164.59 CAD
Engine Camshaft
Part Number: 12638804
Other Names: Camshaft More Names
Description: Silverado, sierra. Express, savana. More Info
MSRP $335.74 CAD
$228.94 CAD
MSRP $335.74 CAD
$228.94 CAD
Engine Camshaft
Part Number: 12642853
Other Names: Camshaft More Names
Description: Express, savana. Canyon, Colorado. Exhaust. Incl.Engine Timing Camshaft Gear. More Info
MSRP $385.72 CAD
$263.04 CAD
MSRP $385.72 CAD
$263.04 CAD
Engine Camshaft
Part Number: 12646602
Other Names: Camshaft, Engine Camshaft And Lifter Kit More Names
Description: Express, savana. Canyon, Colorado. Intake. Incl.Engine Timing Camshaft Gear. More Info
MSRP $318.13 CAD
$216.97 CAD
MSRP $318.13 CAD
$216.97 CAD
Engine Camshaft
Part Number: 12675780
Other Names: Camshaft, Engine Exhaust Camshaft More Names
Description: Volt. Exhaust. More Info
MSRP $182.67 CAD
$124.58 CAD
MSRP $182.67 CAD
$124.58 CAD
Engine Camshaft
Part Number: 12688075
Other Names: Intake Camshaft More Names
Description: Intake. More Info
MSRP $161.60 CAD
$110.20 CAD
MSRP $161.60 CAD
$110.20 CAD
Engine Camshaft
Part Number: 12561721
Other Names: Camshaft, LS1\/LQ9 Stock Camshaft More Names
Description: All models. 6.0l. Express, savana. 6.0l. Corvette. LS1. 5.7l. Hummer H2. GTO. More Info
MSRP $991.73 CAD
$676.44 CAD
MSRP $991.73 CAD
$676.44 CAD
Engine Camshaft
Part Number: 12565165
Options: Right
Other Names: Camshaft, Passenger Side Engine Exhaust Camshaft More Names
Description: DTS. All models. Exhaust. Lucerne. Right. Bonneville. Seville. Sls. Vin code y. STS. More Info
MSRP $382.72 CAD
$261.00 CAD
MSRP $382.72 CAD
$261.00 CAD
Engine Camshaft
Part Number: 12565170
Options: Left
Other Names: Camshaft, Driver Side Engine Intake Camshaft More Names
Description: DTS. Lucerne. Left. All models. Seville. STS. Vin code 9. Intake. More Info
MSRP $347.12 CAD
$236.69 CAD
MSRP $347.12 CAD
$236.69 CAD
Engine Camshaft
Part Number: 12578511
Other Names: Camshaft, Engine Intake Camshaft More Names
MSRP $276.43 CAD
$188.56 CAD
MSRP $276.43 CAD
$188.56 CAD
Engine Camshaft
Part Number: 12590699
Other Names: Camshaft More Names
Description: HHR. 2.2l. Cobalt. 2.2l. Malibu. G5. 2.2l. Intake. More Info
MSRP $170.93 CAD
$116.58 CAD
MSRP $170.93 CAD
$116.58 CAD
Engine Camshaft
Part Number: 12590700
Other Names: Camshaft, Exhaust Camshaft More Names
Description: HHR. 2.2l. Cobalt. 2.2l. Malibu. G5. 2.2l. Exhaust. More Info
MSRP $156.65 CAD
$106.84 CAD
MSRP $156.65 CAD
$106.84 CAD
Engine Camshaft
Part Number: 12591840
Other Names: Camshaft More Names
Description: Impala, Monte Carlo. 3.5l. G6. 3.5l. Malibu. Aura. Vue. More Info
MSRP $381.36 CAD
$260.06 CAD
MSRP $381.36 CAD
$260.06 CAD
Engine Camshaft
Part Number: 12593206
Other Names: Camshaft More Names
Description: All models. Corvette. 6.0l. More Info
MSRP $518.60 CAD
$353.88 CAD
MSRP $518.60 CAD
$353.88 CAD
Engine Camshaft
Part Number: 12619823
Other Names: Camshaft More Names
Description: Silverado, sierra. Tahoe. 5.3l. Suburban. 5.3l. Yukon. 5.3l. More Info
MSRP $250.51 CAD
$170.84 CAD
MSRP $250.51 CAD
$170.84 CAD
Engine Camshaft
Part Number: 12623063
Other Names: Camshaft More Names
Replaces: 12603844
Description: Camaro. Without supercharger. Manual trans. SS. Corvette. 6.2l. G8. 6.2l. More Info
MSRP $317.59 CAD
$216.58 CAD
MSRP $317.59 CAD
$216.58 CAD
Engine Camshaft
Part Number: 55561748
Other Names: Camshaft, Engine Exhaust Camshaft More Names
Description: G3. Exhaust. More Info
MSRP $509.18 CAD
$347.25 CAD
MSRP $509.18 CAD
$347.25 CAD
Engine Camshaft
Part Number: 55568389
Other Names: Camshaft More Names
Description: Aveo, Aveo5. Exhaust. More Info
MSRP $182.62 CAD
$124.63 CAD
MSRP $182.62 CAD
$124.63 CAD
Engine Camshaft
Part Number: 10241264
Other Names: Camshaft More Names
Description: All models. 5.7l. Express, savana. All models. 5.0l. More Info
MSRP $544.24 CAD
$371.13 CAD
MSRP $544.24 CAD
$371.13 CAD
Engine Camshaft
Part Number: 12607530
Other Names: Camshaft More Names
Description: Impala, Monte Carlo. 3.9l. More Info
MSRP $387.60 CAD
$264.48 CAD
MSRP $387.60 CAD
$264.48 CAD
Engine Camshaft
Part Number: 12625438
Other Names: Camshaft More Names
Replaces: 12607715
Description: Caprice PPV. Avalanche. 6.0l. More Info
MSRP $212.48 CAD
$144.92 CAD
MSRP $212.48 CAD
$144.92 CAD
Engine Camshaft
Part Number: 12638651
Other Names: Camshaft, Engine Intake Camshaft More Names
Description: Canyon, Colorado. Envision. Impala. Acadia. LaCrosse. ATS. 2.5l. Blazer. Intake. Malibu. 2.5l. More Info
MSRP $158.42 CAD
$108.05 CAD
MSRP $158.42 CAD
$108.05 CAD
Engine Camshaft
Part Number: 12666073
Options: Left
Other Names: Camshaft, Driver Side Intake Camshaft More Names
Description: Traverse. Intake. Left. Enclave. More Info
MSRP $120.95 CAD
$82.48 CAD
MSRP $120.95 CAD
$82.48 CAD
Engine Camshaft
Part Number: 12675779
Other Names: Camshaft, Engine Intake Camshaft More Names
Description: Volt. Intake. More Info
MSRP $178.37 CAD
$121.64 CAD
MSRP $178.37 CAD
$121.64 CAD
Engine Camshaft
Part Number: 12677826
Options: Left
Other Names: Camshaft, Driver Side Intake Camshaft More Names
Replaces: 12647875
MSRP $124.48 CAD
$84.88 CAD
MSRP $124.48 CAD
$84.88 CAD
Engine Camshaft
Part Number: 12677833
Options: Left
Other Names: Camshaft, Driver Side Exhaust Camshaft More Names
Replaces: 12647877
MSRP $110.24 CAD
$75.17 CAD
MSRP $110.24 CAD
$75.17 CAD
Engine Camshaft
Part Number: 12684808
Options: Right
Other Names: Passenger Side Intake Camshaft More Names
Replaces: 12659317
Description: Intake. Optional. More Info
MSRP $171.94 CAD
$117.25 CAD
MSRP $171.94 CAD
$117.25 CAD
Engine Camshaft
Part Number: 12684809
Options: Left
Other Names: Driver Side Intake Camshaft More Names
Replaces: 12659322
Description: Intake. Optional. More Info
MSRP $171.94 CAD
$117.25 CAD
MSRP $171.94 CAD
$117.25 CAD
Engine Camshaft
Part Number: 12698637
Other Names: Camshaft, Intake Camshaft More Names
Replaces: 12698636
Description: Silverado, sierra. Intake. More Info
MSRP $193.20 CAD
$131.75 CAD
MSRP $193.20 CAD
$131.75 CAD
Engine Camshaft
Part Number: 12565166
Options: Left
Other Names: Camshaft, Driver Side Engine Intake Camshaft More Names
Description: DTS. All models. Intake. Lucerne. Left. Seville. STS. Vin code y. Bonneville. More Info
MSRP $380.19 CAD
$259.25 CAD
MSRP $380.19 CAD
$259.25 CAD
Engine Camshaft
Part Number: 12565308
Other Names: Camshaft, LS6 Camshaft More Names
Description: Corvette. Ls6. CTS-v. More Info
MSRP $705.32 CAD
$481.01 CAD
MSRP $705.32 CAD
$481.01 CAD
Engine Camshaft
Part Number: 12568826
Options: Right
Other Names: Camshaft, Passenger Side Engine Exhaust Camshaft More Names
Description: DTS. Lucerne. Right. All models. Seville. Intake. Sls. Vin code 9. Exhaust. More Info
MSRP $340.55 CAD
$232.24 CAD
MSRP $340.55 CAD
$232.24 CAD
Engine Camshaft
Part Number: 12568827
Options: Left
Other Names: Camshaft, Driver Side Engine Exhaust Camshaft More Names
Description: DTS. Lucerne. Left. All models. Seville. STS. Vin code 9. Exhaust. More Info
MSRP $352.64 CAD
$240.47 CAD
MSRP $352.64 CAD
$240.47 CAD
Engine Camshaft
Part Number: 25203252
Other Names: Exhaust Camshaft More Names
Description: Exhaust. More Info
MSRP $288.64 CAD
$196.84 CAD
MSRP $288.64 CAD
$196.84 CAD
Engine Camshaft
Part Number: 90537666
Other Names: Camshaft, Exhaust Camshaft More Names
Description: Cavalier, Sunfire. Ion. 2.2l. Alero, Grand Am. Cobalt. 2.2l. Vue. Malibu. HHR. 2.2l. Saturn. Exhaust. 2.2l. More Info
MSRP $360.00 CAD
$245.51 CAD
MSRP $360.00 CAD
$245.51 CAD
Engine Camshaft
Part Number: 90537667
Other Names: Camshaft More Names
Description: Ion. 2.2l. Cobalt. 2.2l. Vue. Malibu. HHR. 2.2l. Intake. 2.2l. More Info
MSRP $303.53 CAD
$207.00 CAD
MSRP $303.53 CAD
$207.00 CAD
Valve Cover
Part Number: 12614738
Other Names: Engine Valve Cover, Camshaft Cover More Names
Replaces: 12587283, 12602915
MSRP $191.74 CAD
$130.77 CAD
MSRP $191.74 CAD
$130.77 CAD
Engine Camshaft
Part Number: 12638410
Options: Left
Other Names: Driver Side Engine Exhaust Camshaft More Names
Description: Exhaust. 2nd Design. Thrust Ring Behind Front Cam Cap. More Info
MSRP $234.51 CAD
$159.92 CAD
MSRP $234.51 CAD
$159.92 CAD
Engine Camshaft
Part Number: 12638411
Options: Left
Other Names: Driver Side Engine Intake Camshaft More Names
Description: Intake. 2nd Design. Thrust Ring Behind Front Cam Cap. More Info
MSRP $234.51 CAD
$159.92 CAD
MSRP $234.51 CAD
$159.92 CAD
Engine Camshaft
Part Number: 12638412
Options: Right
Other Names: Passenger Side Engine Exhaust Camshaft More Names
Description: Exhaust. 2nd Design. Thrust Ring Behind Front Cam Cap. More Info
MSRP $234.51 CAD
$159.92 CAD
MSRP $234.51 CAD
$159.92 CAD
Engine Camshaft
Part Number: 12641988
Options: Right
Other Names: Camshaft, Passenger Side Engine Exhaust Camshaft More Names
Description: XTS. With turbocharger. CTS. With vsport. ATS. Right. Exhaust. More Info
MSRP $151.45 CAD
$103.29 CAD
MSRP $151.45 CAD
$103.29 CAD

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