Chevrolet Silverado 1500
6.2L V8 EcoTec3 — top gasoline option in GM trucks. L87 (2021-2024): massive recall for metal shavings left in engine from manufacturing — 597,000 vehicles, engine replacement as fix. Wait times 6-8 weeks. Same AFM/DFM lifter issues as the 5.3L. Anyone buying 2021-2024: checking recall status is mandatory.
6.2 V8 — 420 hp in a truck, if the engine isn't recalled
420 hp V8: the brute force option. Same AFM lifter problems as the 5.3L. For T1XX (2021-2024): recall for metal shavings in engine — 597,000 vehicles. Checking recall status before buying is mandatory.
Engine Weaknesses 4
Manufacturing debris (metal shavings) in engine destroys bearings. 2021-2024 L87. Free engine replacement, 6-8 week wait. NHTSA investigating post-recall failures.
Same lifter issue as 5.3L — cylinder deactivation wears lifters.
Symptoms: Ticking/knocking, misfires, rough running
Piston rings let oil past — 0.5-1 quart per 2,000 miles in severe cases. Also affects 2019-2020 L87 not covered by the machining debris recall. NHTSA investigating these cases separately.
Symptoms: Blue smoke, dropping oil level, fouled spark plugs, positive oil consumption test
Timing chain and guides wear at high mileage — same issue as the 5.3L V8.
Symptoms: Cold start rattle, P0008/P0016 OBD codes
Vehicle Weaknesses 3
Condenser cracks at weld points — no more cold air.
Strong vibration at 35-70 mph, felt in steering wheel and floor. Causes: aluminum driveshaft, torque converter, transmission fluid. Often from just 20k miles.
8L90 torque converter slip at steady speed. TSB 18-NA-355.