2018 Gmc Sierra 2500: Reliability Data

Source: NHTSA — 43 complaints
43
Total Complaints
10,000mi
Median Mileage
ENGINE
Top Issue
0
Crash Reports

When Do Complaints Happen?

Distribution of NHTSA complaints by vehicle mileage at time of report.

3,500 25th Percentile
10,000 Median Mileage
27,450 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

ENGINE
7
ELECTRICAL SYSTEM
6
UNKNOWN OR OTHER
5
FUEL/PROPULSION SYSTEM
4
EXTERIOR LIGHTING
4
EQUIPMENT
4
TIRES
2
POWER TRAIN
2
VISIBILITY/WIPER
2
TIRES:SIDEWALL
1

Severity Assessment

0
Crashes
2
Fires
0
Injuries
0
Deaths

Sample Complaint Reports

"MY HUSBAND WAS DRIVING OUR BRAND NEW DENALI WHICH HAS ONLY 3500 MILES ON IT. THE ENGINE COMPLETELY SHUT DOWN CROSSING A HIGHWAY WITH 55 MILES PER HOUR POSTING AND MY DAUGTHER OF 8 YEARS OLD WAS IN THE BACK SEAT. THE ENGINE AS I SAID COMPLETELY SHUT DOWN WITH NO INDICATOR LIGHTS OR WARNING AND MY HUS..."
"WHILE THE TRUCK WAS UNATTENDED, SMOKE WAS OBSERVED BY A PASSER-BY WHO CALLED THE LOCAL FIRE DEPARTMENT. FIRE DEPT BROKE A WINDOW FOR ACCESS, EXTINGUISHED FIRE. HAULED VEHICLE AWAY FOR SAFEKEEPING. HAPPENED WHILE WE WERE AT A CONDO COMPLEX, VEHICLE PARKED FOR THE EVENING. HEAT INTENSITY AND MELTED ..."
"HEADLIGHTS SHAKE WHEN GOING OVER BUMPS IN HIGHWAY. ITS DISTRACTING AND IRRITATING AND TAKES YOUR ATTENTION FROM THE ROAD WHEN IT HAPPENS."

Source: NHTSA ODI Complaints Database. Names and identifying details omitted.

Data source: View this vehicle on NHTSA.gov | NHTSA ODI Complaints Database. Public domain.

Methodology: Complaint counts and mileage distributions are computed directly from consumer-reported NHTSA complaints. This data represents reported issues, not failure rates — vehicles without complaints are not represented. Full methodology.

Data through: 2026-03-28