"How reliable is the 2008 Gmc Sierra 2500?"

"Based on 77 NHTSA complaints, the 2008 Gmc Sierra 2500 has a median complaint mileage of 71800 miles. The most common issue is Air Bags."

"What are common problems with the 2008 Gmc Sierra 2500?"

"The most frequently reported component in NHTSA complaints for the 2008 Gmc Sierra 2500 is Air Bags, accounting for a significant portion of the 77 total complaints filed."

2008 Gmc Sierra 2500: Reliability Data

Source: NHTSA — 77 complaints

Total Complaints

71,800mi

Median Mileage

Air Bags

Top Issue

Crash Reports

When Do Complaints Happen?

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

34,000 25th Percentile

71,800 Median Mileage

100,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Air Bags

Unknown Or Other

Engine

Body

Fuel System, Diesel

Power Train

Steering

Seat Belts

Electrical System

Fuel System, Gasoline

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL*THE CONTACT OWNS A 2008 GMC SIERRA 2500. WHILE DRIVING 35 MPH, THE CONTACT NOTICED THAT THE CAMPER WAS FULL OF DUST AND DIRT DUE TO HOLES UNDER THE VEHICLE AND AROUND THE TAILGATE. THE DEALER STATED THAT THE CAUSE OF THE FAILURE WAS UNKNOWN AND THEY INSTALLED A BED LINER. THE ENGINE SIZE WAS U..."

"TL*THE CONTACT OWNS A 2008 GMC SIERRA 2500. THE SIDE MIRRORS FAIL TO AUTOMATICALLY TILT DOWNWARDS WHEN THE VEHICLE IS PLACED INTO REVERSE. THE COMPONENT IS A SAFETY OPTION ON THE VEHICLE. GM STATED THAT THEY DID NOT HAVE A PROGRAM TO REPAIR THIS FAILURE. THE CURRENT MILEAGE WAS 23,000 AND FAILUR..."

"HOSE CLAMP ON HOSE AT COOLANT RESERVOIR LOWER CONNECTION FAILED. VEHICLE HAD 1,935 MILES ON IT. HOSE CLAMP WAS EITHER DEFECTIVE OR OVER STRESSED AT INSTALLATION WHEN TRUCK WAS MANUFACTURED. THIS FAILURE RESULTED IN A RAPID LOSS OF ENGINE COOLANT. VEHICLE WAS STOPPED PRIOR TO OVERHEATING DUE TO DR..."

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

When Were Complaints Filed?

Number of complaints by the year the issue occurred.

When Does Each Component Fail?

Median mileage at complaint for top components.

Air Bags 38 complaints

25th: 40,000 mi Median: 75,000 mi 75th: 95,500 mi

Unknown Or Other 9 complaints

25th: 60,000 mi Median: 75,000 mi 75th: 80,000 mi

Engine 4 complaints

25th: 43,736 mi Median: 72,657 mi 75th: 112,500 mi

Where Are Complaints Coming From?

Top states by complaint count.

FL: 11 NC: 11 CA: 6 CO: 4 TX: 4 WA: 4 LA: 3 ID: 3 AZ: 3 NJ: 3

Who Files Complaints?

3.9%

Original Owners

96.1%

Second+ Owners

Gmc Sierra 2500 — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1999	42	100,000	Service Brakes	3
2000	62	91,500	Service Brakes, Hydraulic	4
2001	171	66,500	Service Brakes, Hydraulic	19
2002	164	85,000	Service Brakes	13
2003	193	76,000	Service Brakes, Hydraulic	8
2004	175	60,000	Service Brakes	4
2005	159	58,483	Electrical System	5
2006	78	42,000	Service Brakes	4
2007	98	70,000	Air Bags	5
2009	37	39,200	Electrical System	1
2011	81	57,000	Air Bags	2
2012	39	70,000	Air Bags	1
2013	57	60,000	Unknown Or Other	2
2014	39	39,500	Unknown Or Other	4
2015	100	34,289	Exterior Lighting	7
2016	75	25,000	Steering	2
2017	50	18,060	Service Brakes	4
2018	43	10,000	Engine	0
2019	38	25,458	Electrical System	0
2020	106	20,450	Power Train	1
2021	56	51,248	Power Train	6
2022	48	15,167	Electrical System	1
2023	34	33,000	Power Train	1
2024	118	7,000	Electrical System	3
2025	27	-	Steering	3

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