The 2022 Chevrolet Silverado's 6.2L V8 shares the Active Fuel Management system with the 5.3L, making it susceptible to similar lifter tick issues. Understanding the 6.2L's specific characteristics helps address this common complaint.
6.2L AFM System Overview
The 6.2L L87 engine uses Dynamic Fuel Management (DFM), an advanced cylinder deactivation system that can shut down any combination of cylinders based on load. This complexity increases the number of deactivating lifters compared to earlier AFM systems.
Causes of AFM Lifter Tick
Oil Pressure at Idle
Lifter operation depends on oil pressure. Low idle pressure or slow pressure rise at startup can cause momentary lifter noise until hydraulic pressure stabilizes the lifter mechanism.
Lifter Preload Loss
Deactivating lifters use more complex internals that can develop internal wear, losing preload and creating tick. This is more common in lifters that cycle frequently.
Oil Contamination
Contaminated or degraded oil affects lifter operation. The precise clearances in DFM lifters make them sensitive to oil condition.
Software-Induced Cycling
Aggressive DFM calibration can cycle lifters frequently, accelerating wear. Some owners notice reduced tick after software updates that modify deactivation strategy.
Addressing AFM/DFM Tick
Solutions range from conservative (software updates, oil changes) to aggressive (lifter replacement, AFM delete). The appropriate approach depends on tick severity and your long-term ownership plans.