How to replace the Lash Adjuster in the LH6, LMG, LY5, and L76 engines on GMC Sierra 1500?

To change the lash adjusters (209, 219) in the lh6, lmg, ly5, and l76 engines, remove the Cylinder Head and gasket. Then remove the Lash Adjuster guide bolts (211) and Lash Adjuster guides (210) along with Lash Adjuster, noting the installed position of the guides as the notched area needs to face locating tab on the engine block. Remove lash adjusters from the guide and arrange or mark the components for re-assembly at their original positions. Clean and scrutinize the lash adjusters if the need arises. When re-fitting, place clean oil on the lash adjusters and the engine block Lash Adjuster bores, then insert the adjusters into the guides making sure the flat area on the non-active fuel management adjuster is in the flat area in the guide bore and that the active fuel management adjusters are in the guides with the notch in the guide aligned with the raised install the lash adjusters and guide (210) to the engine block paying due attention to fastener precautions and secure with Lash Adjuster guide bolts (211) torqued to 12 nm (106 lb in). Lastly, install the Cylinder Head and gasket.

OEM GMC Sierra 1500 Lash Adjuster

Lash Adjuster Lifter

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GMC Sierra 1500 Valve Lifters
Part Number: 17122490
$35.25 MSRP: $60.54
You Save: $25.29 (42%)
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Product Specifications
- Other Name: Lifter, Engine Valve Lifter; Valve Lifter
- Replaces: 05234670, 5234670
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2013 GMC Sierra 1500 | Base, C3, Denali, HT, Hybrid, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 5.3 L GAS, 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Valve Lifters
Part Number: 12698945
$30.25 MSRP: $49.82
You Save: $19.57 (40%)
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Product Specifications
- Other Name: Lifter Assembly-Valve (Non Afm); Lifter, Engine Valve Lifter; Lifter, Engine Valve
- Replaces: 12648846, 12576400
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2012-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Pro, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Valve Lifters
Part Number: 55569933
$3.11 MSRP: $4.93
You Save: $1.82 (37%)
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Product Specifications
- Other Name: Lifter Assembly-Valve; Valve Lifter; Adjuster, Engine Valve Lifter; Lifter, Engine Valve Lifter
- Replaces: 12855340
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2020-2023 GMC Sierra 1500 | AT4, AT4X, Denali, Denali Ultimate, Elevation, SLE, SLT | 6 Cyl 3.0 L DIESEL
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GMC Sierra 1500 Valve Lifters
Part Number: 12698946
$46.83 MSRP: $81.88
You Save: $35.05 (43%)
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Product Specifications
- Other Name: Lifter Assembly-Valve (Afm); Lifter, Engine Valve Lifter
- Replaced by: 12740071
- Replaces: 12639516, 12680871, 12571595, 12632143, 12619820, 12645725, 12569256
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2007-2023 GMC Sierra 1500 | AT4, AT4X, Base, Denali, Denali Ultimate, Elevation, Hybrid, Pro, SL, SLE, SLT, WT, XFE | 6 Cyl 4.3 L FLEX, 6 Cyl 4.3 L GAS, 8 Cyl 4.8 L FLEX, 8 Cyl 4.8 L GAS, 8 Cyl 5.3 L FLEX, 8 Cyl 5.3 L GAS, 8 Cyl 5.3 L MILD HYBRID EV-GAS (MHEV), 8 Cyl 6.0 L FULL HYBRID EV-FLEX (FHEV), 8 Cyl 6.0 L FULL HYBRID EV-GAS (FHEV), 8 Cyl 6.0 L GAS, 8 Cyl 6.2 L FLEX, 8 Cyl 6.2 L GAS
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GMC Sierra 1500 Valve Lifters
Part Number: 17120090
$36.47 MSRP: $60.07
You Save: $23.60 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Lifter, Engine Valve Lifter; Valve Lifter
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1999-2004 GMC Sierra 1500 | Base, HT, SL, SLE, SLT, WT | 6 Cyl 4.3 L GAS
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Part Number: 12663277
$2.68 MSRP: $4.43
You Save: $1.75 (40%)
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Product Specifications
- Other Name: Adjuster-Hydraulic Valve Lash; Valve Lifter; Adjuster, Engine Valve Lifter; Adjuster, Engine Valve
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2019-2023 GMC Sierra 1500 | Base, Elevation, Pro, SLE | 4 Cyl 2.7 L GAS

GMC Sierra 1500 Lash Adjuster

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GMC Sierra 1500 Lash Adjuster Parts Questions & Experts Answers

Valve Lifters
17122490
Q: How to replace the Lash Adjuster in the LH6, LMG, LY5, and L76 engines on GMC Sierra 1500?
A: To change the lash adjusters (209, 219) in the lh6, lmg, ly5, and l76 engines, remove the Cylinder Head and gasket. Then remove the Lash Adjuster guide bolts (211) and Lash Adjuster guides (210) along with Lash Adjuster, noting the installed position of the guides as the notched area needs to face locating tab on the engine block. Remove lash adjusters from the guide and arrange or mark the components for re-assembly at their original positions. Clean and scrutinize the lash adjusters if the need arises. When re-fitting, place clean oil on the lash adjusters and the engine block Lash Adjuster bores, then insert the adjusters into the guides making sure the flat area on the non-active fuel management adjuster is in the flat area in the guide bore and that the active fuel management adjusters are in the guides with the notch in the guide aligned with the raised install the lash adjusters and guide (210) to the engine block paying due attention to fastener precautions and secure with Lash Adjuster guide bolts (211) torqued to 12 nm (106 lb in). Lastly, install the Cylinder Head and gasket.