2015 Gmc Denali: Reliability Data

Source: NHTSA — 27 complaints
27
Total Complaints
50,000mi
Median Mileage
EXTERIOR LIGHTING
Top Issue
1
Crash Reports

When Do Complaints Happen?

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

44,415 25th Percentile
50,000 Median Mileage
71,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

EXTERIOR LIGHTING
6
POWER TRAIN
5
ELECTRICAL SYSTEM
4
SERVICE BRAKES
2
STEERING
2
VISIBILITY/WIPER
1
SUSPENSION
1
VEHICLE SPEED CONTROL
1
ELECTRONIC STABILITY CONTROL (ESC)
1
FUEL/PROPULSION SYSTEM
1

Severity Assessment

1
Crashes
0
Fires
1
Injuries
0
Deaths

Sample Complaint Reports

"REAR TAILLIGHTS HAVE MOISTURE IN THEM. THE MOISTURE IS CONSTANT IN ONE AND INTERMITTENT IN THE OTHER. BOTH HAVE BEEN REPLACED ONCE BY DEALER 3 MONTHS AGO. PROBLEM STILL EXISTS"
"LETTER FROM SENATOR FEINSTEIN INQUIRY ON BEHALF OF CONSTITUENT IN REGARDS TO HAVING PROBLEMS WITH GMC SIERRA DENALI PICKUP 2015. *LD THE CONSUMER STATED THE VEHICLE HAS HAD MULTIPLE ISSUES WITH THE SUSPENSION, TRANSMISSION, AND ELECTRONICS. THE VEHICLE WOULD RIDE ROUGH AND THE STABILITY LIGHT WOU..."
"LETTER FROM SENATOR FEINSTEIN INQUIRY ON BEHALF OF CONSTITUENT IN REGARDS TO HAVING PROBLEMS WITH GMC SIERRA DENALI PICKUP 2015. *LD THE CONSUMER STATED THE VEHICLE HAS HAD MULTIPLE ISSUES WITH THE SUSPENSION, TRANSMISSION, AND ELECTRONICS. THE VEHICLE WOULD RIDE ROUGH AND THE STABILITY LIGHT WOU..."

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