2018 GMC Sierra 1500 problems and complaints
Owners have filed 305 complaints with NHTSA about the 2018 GMC Sierra 1500. The most-reported areas: Power Train (131), Engine (67), Service Brakes (44).
Key takeaways
- 305 owner complaints on file with NHTSA.
- 10 involve a crash, 1 a fire, 5 reported injuries.
- Complaints are unverified owner reports; recalls are confirmed defects.
| Component | Complaints | Share |
|---|---|---|
| Power Train | 131 | 43% |
| Engine | 67 | 22% |
| Service Brakes | 44 | 14% |
| Electrical System | 43 | 14% |
| Steering | 30 | 10% |
| Unknown Or Other | 25 | 8% |
| Suspension | 11 | 4% |
| Fuel/Propulsion System | 10 | 3% |
| Air Bags | 8 | 3% |
| Wheels | 7 | 2% |
| Forward Collision Avoidance | 6 | 2% |
| Structure | 6 | 2% |
One complaint can name several components, so shares add up to more than 100%.
| Version | Overall | Front | Side | Rollover |
|---|---|---|---|---|
| 2018 GMC Sierra 1500 PU/EC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/EC 4WD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 Hybrid PU/CC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
| 2018 GMC Sierra 1500 PU/CC RWD | 5/5 | 5/5 | 5/5 | 4/5 |
Latest complaints, as filed
Owner-written and unverified by NHTSA.
Power Train - filed 2026-10-09
My 2018 GMC Sierra 1500 experienced significant transmission problems that began as rough, inconsistent shifting, hesitation, and abnormal transmission behavior before eventually progressing to complete transmission failure. These symptoms were present before the transmission's ultimate failure and while the vehicle w...
Engine - filed 2026-09-21
I was backing out of my garage and truck made strange noise and shut off . Tried to restart but just made ding and wouldn't turn over . Dash lights went blank. Had vehicle towed to shop and mechanic stated it was crank and connecting rods after he dropped the oil pan. I ordered new OEM engine and waiting on delivery ...
Engine - filed 2026-09-21
CUSTOMER STATES: THINKS CRANKSHAFT PULLEY IS LOOSE DUE TO PRIOR WATER PUMP REPLACEMENT-CRACKSHAFT PULLEY HAS NOTHING TO DO WITH WATER PUMP REPLACEMENT. BEFORE INSPECTING/STARTING ENGINE VERIFIED OIL LEVEL-OIL LEVEL IS ON FULL MARK. STARTED ENGINE-LOUD RATTLING/KNOCKING NOISE FROM ENGINE-ENGINE HAS INTERNAL FAILURE-ENGI...
Diagnose it yourself
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.
More for the 2018 GMC Sierra 1500
Complaints are reports filed by owners with the National Highway Traffic Safety Administration. NHTSA publishes them without verifying them, and counts rise with how many cars were sold, so compare years of the same model rather than different models. Crash ratings are NHTSA's own 5-Star Safety Ratings results.