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2018 GMC Sierra Denali

Owner reports · Recalls · Investigations

Limited comparison data

There is not enough comparable history to draw a useful model-year comparison.

About this comparison →
17Owner complaints

Model-year median: 12

0Recall campaigns

View recall details →

0Investigations

View investigation details →

How this year compares

Owner complaints by model year

Other model years Selected year
22
201530
201614
201717
201826
201911
2020
Compare all Sierra Denali years →

Counts vary with age, sales and reporting. They are not failure rates.

What owners reported most

Engine
5Service Brakes
4Structure
4Exterior Lighting
3Steering
3
All reported categories
Electronic Stability Control (esc)
2Power Train
2Suspension
1Unknown Or Other
1Wheels
1

Tap a category to read its complaints. One report may name several components.

When problems were reported

Mileage at the reported incident

Limited mileage data: 13 of 17 reports include usable mileage. There isn’t enough coverage to show a useful chart.

NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.

What to inspect

Issues worth paying extra attention to based on owner reports.

  • Engine. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Service Brakes. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Structure. Review the 4 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports0 fire reports1 injury reports

Structure complaints

4 reports
Clear category filter
107,000 miles · Mar 11, 2026
EngineStructure

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, w…

Read full complaint

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated that while driving at an undisclosed speed, and while the vehicle was parked, the running boards unexpectedly lowered. Additionally, there was oil leaking from the vehicle, and the check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed with camshaft failure. The contact was informed that the camshaft needed to be replaced. The vehicle was repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 107,000.

NHTSA ODI #11723657

35,000 miles · Jun 29, 2023
Structure

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no assistance and advised the con…

Read full complaint

The contact owns a 2018 GMC Sierra 1500 Denali. The contact stated while exiting a parking lot, the passenger’s side running board detached from the vehicle causing minor damages to the passenger’s side of the vehicle. There was no warning light illuminated. The dealer was contacted but provided no assistance and advised the contact that the running board needed to be replaced. The vehicle was not repaired. The manufacturer was contacted but provided no assistance. The failure mileage was 35,000.

NHTSA ODI #11529615

61,000 miles · Apr 5, 2021
Structure

HOOD VENT FELL OFF WHILE DRIVING NORMAL SPEEDS ON THE HIGHWAY AND HIT THE CAR BEHIND ME. I FEEL THAT THE CHEAP PLASTIC IS DEFECTIVE AND COULD CAUSE A PROBLEM WITH THE PART GOING AIRBORNE AT HIGH SPEEDS AND HITTING OTHER CARS.

NHTSA ODI #11406471

28,000 miles · Jun 21, 2020
StructureSuspension

THE REAR END MAKES NOISE WHEN TURNING AND SOMETIMES STOPING. WHEN WEIGHT IS PLACE ON BED THE REAR END MAKE NOISES. SOMETHING IS WRONG IN THE REAR END OF THIS TRUCK. WHEN TRUCK IS MOVING AND TURNING YOU CAN HERE THE NOISE.

NHTSA ODI #11329880

Official recalls

0

No recalls in this snapshot.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

0

No exact-year investigations in this snapshot.