2018 GMC Sierra 1500 problems and complaints
Owners have filed 304 complaints with NHTSA about the 2018 GMC Sierra 1500. The most-reported areas: Power Train (130), Engine (67), Service Brakes (44).
Key takeaways
- 304 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 | 130 | 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.
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...
Power Train - filed 2026-09-17
Vehicle purchased Certified Pre-Owned in October of 2021 with roughly 43,000 miles. During the first service (47,598 miles) at a GM dealer I reported very hard shifts, but this issue was ignored during service. At the next servce (54,571 miles) I again reported the hard shifts and "surging" when coming to a stop but ...
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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.