How to remove the camshaft and Lash Adjuster on 4.3L V6 engine on GMC Sierra?

Begin with taking off the camshaft by unscrewing or unbolting the rocker arms, push rods, intake manifolds, timing chains, cam sprocket and balance shaft drive gear; in addition, you may have to do away with such things as fan radiator and condenser. Place the lash adjusters in a labeled box and disconnect the lash adjuster retainer. A special tool can be employed together with magnet or even your fingers to extract the lash adjusters from their bores. Remove the camshaft retainer plate and use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from block. When inspecting clean lash adjuster & cam shaft using solvent checking for wear on both of them. The journals as well as cam lobes should be checked for wear. Measure. If its damaged then it must be replaced along with bearings. To lubricate bearing journals and cam lobes with assembly lube, the camshaft will finally slide into engine during installation. Fix other parts like this: install that thrust plate for a Cam Shaft; balance shaft drive gear plus also timing chain & sprockets. Lubricate lash adjusters using clean engine oil then fix them within block. The rest of installation is opposite to that of removing these components. Cooling system should be refilled at last because we are starting again after changing an engine oil filter. Finally start engine (run) and check there are no leaks.

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34 Camshafts found

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GMC Sierra Camshaft Assembly
Part Number: 12629512
$366.31 MSRP: $578.96
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaced by: 12741466
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2018 GMC Sierra | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, CREW CAB 1/2 TON | 8 Cyl 6.2L
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GMC Sierra Camshaft Assembly
Part Number: 12619823
$126.26 MSRP: $215.89
You Save: $89.63 (42%)
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2022 GMC Sierra | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl5.3L
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GMC Sierra Camshaft Assembly
Part Number: 12625436
$405.90 MSRP: $700.20
You Save: $294.30 (43%)
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12593207
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L, 8 Cyl 5.3L Flex
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GMC Sierra Camshaft Assembly, Overhead Vlv
Part Number: 12689035
$314.35 MSRP: $532.86
You Save: $218.51 (42%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Camshaft
- Replaces: 12625437, 12593205
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 4.8L, 8 Cyl 4.8L Flex, 8 Cyl 5.3L
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GMC Sierra Camshaft Assembly
Part Number: 12612273
$452.93 MSRP: $774.50
You Save: $321.57 (42%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12583227
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2008 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.2L
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GMC Sierra Camshaft Assembly
Part Number: 12625440
$399.07 MSRP: $682.38
You Save: $283.31 (42%)
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12609370
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2010 GMC Sierra | CREW CAB 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 1 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CAB CHASSIS 1 TON 161.5, REGULAR CAB 1 TON, REGULAR CAB 3/4 TON, REGULAR CAB CHASSIS 1 TON 137.0, REGULAR CAB CHASSIS 1 TON 161.5 | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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GMC Sierra Camshaft,Engine
Part Number: 12560967
$477.45 MSRP: $816.41
You Save: $338.96 (42%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2007 GMC Sierra | 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX | 8 Cyl 4.8L, 8 Cyl 5.3L, 8 Cyl 5.3L Flex, 8 Cyl 6.0L
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GMC Sierra Camshaft Assembly
Part Number: 12561721
$493.28 MSRP: $816.41
You Save: $323.13 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2007 GMC Sierra | 1500 CREW CAB LONG BOX, 1500 CREW CAB STANDARD BOX, 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB SHORT BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 1500 CREW CAB LONG BOX, CLASSIC 1500 CREW CAB STANDARD BOX, CLASSIC 1500 EXTENDED CAB LONG BOX, CLASSIC 1500 EXTENDED CAB SHORT BOX, CLASSIC 1500 EXTENDED CAB STANDARD BOX, CLASSIC 1500 REGULAR CAB LONG BOX, CLASSIC 1500 REGULAR CAB STANDARD BOX, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 6.0L
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GMC Sierra Camshaft Assembly
Part Number: 12664572
$140.54 MSRP: $224.14
You Save: $83.60 (38%)
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Product Specifications
- Other Name: CAMSHAFT ASM; Camshaft
- Replaced by: 12742437
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2023-2024 GMC Sierra | 8 Cyl 6.2L
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GMC Sierra Camshaft Assembly
Part Number: 12672469
$145.94 MSRP: $249.50
You Save: $103.56 (42%)
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Product Specifications
- Other Name: CAMSHAFT ASM; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2024 GMC Sierra | CREW CAB 1 TON CHASSIS 137.0, CREW CAB 6'6" BOX 1 TON, CREW CAB 6'6" BOX 3/4 TON, CREW CAB 8' BOX 1 TON, CREW CAB 8' BOX 3/4 TON, EXTENDED CAB 6'6" BOX 3/4 TON, EXTENDED CAB 8' BOX 1 TON, EXTENDED CAB 8' BOX 3/4 TON, EXTENDED CREW CAB 1 TON CHASSIS 161.5, REGULAR CAB 1 TON CHASSIS 137.0, REGULAR CAB 1 TON CHASSIS 161.5, REGULAR CAB 8' BOX 1 TON, REGULAR CAB 8' BOX 3/4 TON | 8 Cyl 6.6L
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GMC Sierra Camshaft,Engine
Part Number: 10241691
$348.60 MSRP: $556.00
You Save: $207.40 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2002 GMC Sierra | 1500 EXTENDED CAB LONG BOX, 1500 EXTENDED CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX | 6 Cyl 4.3L
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GMC Sierra Camshaft Assembly
Part Number: 12664911
$112.61 MSRP: $186.34
You Save: $73.73 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: CAMSHAFT ASM; Camshaft
- Replaced by: 12723516
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 GMC Sierra | CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 5.3L
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GMC Sierra Camshaft Assembly
Part Number: 12664912
$116.88 MSRP: $201.57
You Save: $84.69 (43%)
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT ASM; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 GMC Sierra | CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON | 8 Cyl 6.2L
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GMC Sierra Camshaft Assembly
Part Number: 12629698
$230.46 MSRP: $390.62
You Save: $160.16 (41%)
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Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12612275
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2013 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.0L, 8 Cyl 6.0L Flex
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GMC Sierra CAMSHAFT ASM,OVERHEAD VLV
Part Number: 19432226
$364.31 MSRP: $622.94
You Save: $258.63 (42%)
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Product Specifications
- Replaces: 12633773
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2021 GMC Sierra | 1500 CREW CAB, 1500 CREW CAB STANDARD BOX, 1500 DOUBLE CAB STANDARD BOX, 1500 REGULAR CAB LONG BOX, 1500 REGULAR CAB STANDARD BOX, CREW CAB 1/2 TON, CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 6 Cyl 4.3L
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GMC Sierra CAMSHAFT ASM,OVERHEAD VLV
Part Number: 12711967
$395.15 MSRP: $681.66
You Save: $286.51 (43%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Camshaft
- Replaces: 12617373, 12623065
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2013 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.2L Flex
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GMC Sierra CAMSHAFT ASM-EXH
Part Number: 12703450
$297.45 MSRP: $474.31
You Save: $176.86 (38%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Camshaft
- Replaced by: 12739839
- Replaces: 12663563, 12697973, 12697972
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 GMC Sierra | CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
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GMC Sierra Camshaft Assembly, Int
Part Number: 12698637
$92.42 MSRP: $147.36
You Save: $54.94 (38%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Camshaft
- Replaces: 12698636, 12663557
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2024 GMC Sierra | CREW CAB 5'8" 1/2 TON, CREW CAB 5'8" BOX 1/2 TON, Crew Cab 6'6" Box 1/2 Ton, CREW CAB 6'6" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 4 Cyl 2.7L
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GMC Sierra Camshaft Assembly
Part Number: 12625438
$187.04 MSRP: $309.55
You Save: $122.51 (40%)
ADD TO CART
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Replaces: 12607715
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009 GMC Sierra | CREW CAB 1/2 TON, EXTENDED CAB 5'8" BOX 1/2 TON, EXTENDED CAB 6'6" BOX 1/2 TON, EXTENDED CAB 8' BOX 1/2 TON, REGULAR CAB 6'6" BOX 1/2 TON, REGULAR CAB 8' BOX 1/2 TON | 8 Cyl 6.0L
View related parts
GMC Sierra Camshaft Assembly
Part Number: 12556291
$328.83 MSRP: $519.71
You Save: $190.88 (37%)
Product Specifications
- Other Name: CAMSHAFT, Engine; Camshaft
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2001-2007 GMC Sierra | 2500 CREW CAB LONG BOX, 2500 CREW CAB STANDARD BOX, 2500 EXTENDED CAB LONG BOX, 2500 EXTENDED CAB STANDARD BOX, 2500 REGULAR CAB, 3500 CHASSIS EXTENDED CAB 161.5, 3500 CHASSIS EXTENDED CAB 185.5, 3500 CHASSIS REGULAR CAB 137.0, 3500 CHASSIS REGULAR CAB 161.5, 3500 CREW CAB, 3500 EXTENDED CAB, 3500 REGULAR CAB, CLASSIC 2500 CREW CAB LONG BOX, CLASSIC 2500 CREW CAB STANDARD BOX, CLASSIC 2500 EXTENDED CAB LONG BOX, CLASSIC 2500 EXTENDED CAB STANDARD BOX, CLASSIC 2500 REGULAR CAB, CLASSIC 3500 CHASSIS EXTENDED CAB 161.5, CLASSIC 3500 CHASSIS REGULAR CAB 137.0, CLASSIC 3500 CHASSIS REGULAR CAB 161.5, CLASSIC 3500 CREW CAB, CLASSIC 3500 EXTENDED CAB, CLASSIC 3500 REGULAR CAB | 8 Cyl 8.1L

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GMC Sierra Camshaft

The Camshaft of GMC Sierra is the heartbeat of the truck's engine, turning crankshaft motion into precisely timed opening and closing of the intake and exhaust valves for smooth power. The arrangement is either deep in the block with a traditional OHV layout or up in the cylinder head with SOHC and DOHC setups. The OHV is constructed from tough cast iron or steel. A chain or belt spins the OHV at half crank speed. The tappets, pushrods, and rocker arms are lifted by block-mounted Camshaft designs while overhead designs press directly on followers or buckets, cutting weight and allowing higher revs. Single overhead cam designs feature one Camshaft that operates both valve sets on a cylinder. In contrast, double designs use two separate Camshaft units which allow the system to employ separate timing for intake and exhaust, boosting breathing. Regardless of location, correct phasing with the crank keeps the four strokes in sync, and if a lobe wears out it upsets combustion, triggers misfires, and robs torque. Variable valve timing was added to the Camshaft of later GMC powerplants so that Sierra drivers can enjoy wider power bands without sacrificing efficiency. Each GMC and every Sierra generation relies on a perfectly machined Camshaft to deliver dependable strength.

Each OEM GMC Sierra Camshaft we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

GMC Sierra Camshaft Parts Questions & Experts Answers

Camshaft Assembly
12625436
Q: How to remove the camshaft and Lash Adjuster on 4.3L V6 engine on GMC Sierra?
A:
Begin with taking off the camshaft by unscrewing or unbolting the Rocker Arms, push rods, Intake Manifolds, Timing Chains, cam sprocket and balance shaft drive gear; in addition, you may have to do away with such things as fan radiator and condenser. Place the lash adjusters in a labeled box and disconnect the lash adjuster retainer. A special tool can be employed together with magnet or even your fingers to extract the lash adjusters from their bores. Remove the camshaft retainer plate and use three 6-inch long, 5/16-18 bolts as a handle to remove the camshaft from block. When inspecting clean lash adjuster & cam shaft using solvent checking for wear on both of them. The journals as well as cam lobes should be checked for wear. Measure. If its damaged then it must be replaced along with bearings. To lubricate bearing journals and cam lobes with assembly lube, the camshaft will finally slide into engine during installation. Fix other parts like this: install that thrust plate for a Cam Shaft; balance shaft drive gear plus also timing chain & sprockets. Lubricate lash adjusters using clean engine oil then fix them within block. The rest of installation is opposite to that of removing these components. Cooling system should be refilled at last because we are starting again after changing an engine oil filter. Finally start engine (run) and check there are no leaks.