NHTSA Complaint #11641886 — 2020 GMC SIERRA 1500

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11641886
Vehicle	2020 GMC SIERRA 1500
Component	ENGINE
Date of Incident	August 1, 2024
Date Filed	February 11, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	OH

Consumer Description

At 125,000 miles, the CEL came on and the code is P0016, which is for the timing chain has stretched and jumped a tooth. The engine was new in 2019 and in 2021, they redesigned the timing chains due to early failure. The oil pump belt is listed for inspection/replacement at 150,000 miles, but the timing chain does not give any interval for replacement and should easily outlast the oil pump belt to at least 250,000 miles. GM knows that there is a timing chain issue with the 3.0 Duramax LM2 engine and it is costing owners between, $7,800 and $10,000 to repair.

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