NHTSA Complaint #11715890 — 2026 GMC SIERRA 1500

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11715890
Vehicle	2026 GMC SIERRA 1500
Component	ENGINE
Date of Incident	February 5, 2026
Date Filed	February 5, 2026
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	NJ

Consumer Description

"Vehicle exhibits a severe RPM flutter and rhythmic harmonic vibration at idle. These symptoms are consistent with manufacturing defects in the connecting rod and crankshaft currently under NHTSA RQ26001 and EA25-007 investigations for the GM 6.2L L87 engine. The defect presents a substantial risk of sudden engine seizure and loss of propulsion while driving. Vehicle is currently out of service at Jim Curley GMC for its first repair attempt. The dealer has stated repairs will not begin for several days."

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