Engine Valve Lifter - GM (12740071) 2005-2025 GM

GM 12740071 AFM/DOD Hydraulic Roller Lifter – Genuine GM

Genuine GM 12740071 is the OE AFM/Active Fuel Management hydraulic roller lifter used in a wide range of 2005-up LS-based V8 engines. It’s the correct replacement when an AFM lifter starts ticking, collapses, or causes misfires, and you’re keeping AFM/DOD active with a stock-style calibration.

• Brand: GM Genuine Parts / ACDelco OE

• Part Number: 12740071

• Product Type: Engine valve lifter – AFM/DOD hydraulic roller

• Engine Family: GM LS-based V8s originally equipped with AFM/DOD (4.8L, 5.3L, 6.0L, 6.2L – verify by VIN/RPO)

• Function: Collapsible AFM lifter – maintains zero lash and controls cylinder deactivation when commanded by the ECU

• Use Case: Direct OE-style replacement for noisy, sticking, or failed AFM/DOD lifters on stock or tuned engines that retain AFM

• Replaces GM Numbers: 12569256, 12571595, 12619820, 12632143, 12639516, 12645725, 12680871, 12698946 (and superseded variants)

• Position: Individual lifter – order the quantity required for the affected bank(4) or full set (8)

• Quantity: Sold individually

• Country of Origin: Genuine GM OE – country of origin varies; see packaging for exact “Made in” marking

Popular Combos / Shop Notes:

• Fixing AFM without deleting: Pair with fresh GM head gaskets, new lifter trays, and quality engine oil for long-term reliability.