MYRModel Year Report

2018 GMC Sierra Denali

○ Not enough data
2018 GMC Sierra Denali
RENDERED 2026-08-02T13:05:38.958Z

Only 17 complaints on file — too few for a fair verdict.

This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.

Only 17 complaints on file — too few for a fair verdict. The data below is complete but unranked.

How is this computed?

COMPLAINTS PER YEAR

Complaints per year, GMC Sierra Denali Bar chart of distinct NHTSA complaints filed per model year, 2018 highlighted. 2002: 13 complaints 2002 2004: 11 complaints 2005: 4 complaints 2006: 5 complaints 2006 2007: 1 complaints 2008: 18 complaints 2009: 7 complaints 2009 2010: 10 complaints 2011: 28 complaints 2012: 10 complaints 2012 2013: 8 complaints 2014: 14 complaints 2015: 22 complaints 2015 2016: 30 complaints 2017: 14 complaints 2018: 17 complaints 2018 2019: 26 complaints 2020: 9 complaints 2020
2018: 17 complaints
View as data table
YearComplaints
200213
200411
20054
20065
20071
200818
20097
201010
201128
201210
20138
201414
201522
201630
201714
201817
201926
20209

KNOWN PROBLEM AREAS

Only 17 complaints on file for this model year -- too few to rank by share. Raw counts only, below.

ENGINE

5 of 17 total reports mention: engine.

Show complaint excerpts

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.

NHTSA ODI report, 20260311

SERVICE BRAKES

4 of 17 total reports mention: service brakes.

INJURY
Show complaint excerpts

I NEARLY DIED WHEN MY BRAKES FAILED ON MY 2018 GMC DENALI THIS MORNING. I WAS ONLY GOING 60 MPH WHEN ANOTHER DRIVER CUT IN FRONT OF ME, AND HIT THEIR BRAKES BUT WHEN I TRIED TO STOP, I COULD NOT!

NHTSA ODI report, 20201026

STRUCTURE

3 of 17 total reports mention: structure.

STEERING

3 of 17 total reports mention: steering.

INJURY
Show complaint excerpts

I NEARLY DIED WHEN MY BRAKES FAILED ON MY 2018 GMC DENALI THIS MORNING. I WAS ONLY GOING 60 MPH WHEN ANOTHER DRIVER CUT IN FRONT OF ME, AND HIT THEIR BRAKES BUT WHEN I TRIED TO STOP, I COULD NOT!

NHTSA ODI report, 20201026

POWER TRAIN

2 of 17 total reports mention: power train.

Show complaint excerpts

The contact owns a 2018 GMC Sierra Denali 1500. The contact stated that on several occasions while driving at speeds over 30 MPH, the vehicle started shaking abnormally.

NHTSA ODI report, 20260402

SAFETY TIMELINE

No recalls on file for this model year.

BUY-SMART CHECKLIST

2018 GMC Sierra Denali — pre-purchase inspection

  • Test/inspect for engine issues (5 reports on file for this year).
  • Test/inspect for service brakes issues (4 reports on file for this year).
  • Test/inspect for structure issues (3 reports on file for this year).
Inspected by ______________ Date ______________

FAQ

Is the 2018 GMC Sierra Denali reliable?

There isn't enough NHTSA complaint data on file yet to give this model year a verdict.

What are the most common problems with the 2018 GMC Sierra Denali?

The most-reported component is engine, accounting for 29% of complaints on file.

How many recalls does the 2018 GMC Sierra Denali have?

No recalls are on file for this model year.

Data updated 2026-07-11 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.