2025 GMC SIERRA 3500 Engine Problems
2 NHTSA complaints on file
Engine Issues in the 2025 GMC SIERRA 3500
2 engine complaints have been filed with NHTSA for the 2025 GMC SIERRA 3500. Of these, 0 involved a crash, 0 involved a fire, and 0 resulted in injury.
2
Complaints
0
Crashes
0
Fires
0
Injuries
0
Deaths
All Engine Complaints
Oil cooler for truck is defective and thus allowed all oil to be mixed with the coolant. GM is stating they will flush engine and replace with exact same part. Very common issue and sad to have a $100k truck and it is junk.
“I own a 2025 GMC Sierra with 30,000 miles. The oil cooler failed and caused loss of oil pressure and potential internal engine damage. The dealership acknowledges the failure but refuses to escalate the case or perform a proper inspection. I am being instructed to continue driving the truck even though it may suffer catastrophic failure while driving. This is a safety hazard.”
Other 2025 GMC SIERRA 3500 Problem Areas
Service Brakes
3 complaints
Electrical System
2 complaints
Forward Collision Avoidance Warnings
2 complaints
Electrical System Integrated Trailer Brake Control
1 complaint
Lane Departure Warning
1 complaint
Steering
1 complaint
Structurebody
1 complaint
Tiressidewall
1 complaint
Unknown Or Other
1 complaint