"How reliable is the 2008 Gmc Sierra?"

"Based on 84 NHTSA complaints, the 2008 Gmc Sierra has a median complaint mileage of 68850 miles. The most common issue is Air Bags."

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

"The most frequently reported component in NHTSA complaints for the 2008 Gmc Sierra is Air Bags, accounting for a significant portion of the 84 total complaints filed."

2008 Gmc Sierra: Reliability Data

Source: NHTSA — 84 complaints

Total Complaints

68,850mi

Median Mileage

Air Bags

Top Issue

Crash Reports

When Do Complaints Happen?

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

45,337 25th Percentile

68,850 Median Mileage

89,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Air Bags

Electrical System

Latches/Locks/Linkages

Structure

Body

Unknown Or Other

Power Train

Electronic Stability Control (Esc)

Steering

Vehicle Speed Control

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL*THE CONTACT OWNS A 2008 GMC SIERRA. WHILE DRIVING APPROXIMATELY 25 MPH ON NORMAL ROAD CONDITIONS THE CONTACT BECAME UNCONSCIOUS AND CRASHED INTO A UTILITY POLE. THE POLICE AND AMBULANCE ARRIVED AND THE DRIVER WAS TRANSPORTED TO THE HOSPITAL. THE CONTACT SUSTAINED MINOR INJURIES AND A POLICE REPOR..."

"WENT TO PASS ANOTHER VEHICLE, ACCELERATOR PEDAL STUCK TO FLOOR. WAS DOING 90-100 MPH BEFORE I COULD GET THE KEY TURNED OFF, WHICH CAUSED THE PEDAL TO POP BACK UP. *TR"

"2008 GMC SIERRA. CONSUMER WRITES REGARDING HEATED WASHER FLUID SYSTEM *TGW THE CONSUMER STATED HE RECEIVED A RECALL NOTICE IN THE MAIL REGARDING THE HEATED WASHER FLUID SYSTEM. THE CONSUMER STATED THE DISABLING OF THE SYSTEM WAS SIMPLY NOT ACCEPTABLE. THE CONSUMER LIVES IN AN AREA WHERE THERE ARE B..."

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 29 complaints

25th: 51,045 mi Median: 66,500 mi 75th: 90,500 mi

Electrical System 15 complaints

25th: 40,250 mi Median: 67,435 mi 75th: 94,526 mi

Latches/Locks/Linkages 11 complaints

25th: 35,000 mi Median: 50,000 mi 75th: 87,000 mi

Structure 5 complaints

25th: 55,000 mi Median: 55,000 mi 75th: 69,000 mi

Body 4 complaints

25th: 57,225 mi Median: 82,000 mi 75th: 101,000 mi

Where Are Complaints Coming From?

Top states by complaint count.

MI: 9 FL: 8 SC: 8 GA: 7 WA: 4 PA: 4 CA: 4 WI: 3 TN: 3 TX: 3

Who Files Complaints?

4.8%

Original Owners

95.2%

Second+ Owners

Gmc Sierra — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1990	30	55,000	Antilock/Traction Control/Electronic Limited Slip	1
1992	33	-	Motor	2
1993	109	55,675	Motor	9
1994	221	110,000	Motor	3
1995	327	131,200	Motor	24
1996	310	83,000	Motor	20
1997	302	78,850	Antilock/Traction Control/Electronic Limited Slip	6
1998	230	74,500	Antilock/Traction Control/Electronic Limited Slip	19
1999	720	64,000	Antilock/Traction Control/Electronic Limited Slip	58
2000	557	68,352	Antilock/Traction Control/Electronic Limited Slip	58
2001	333	50,000	Antilock/Traction Control/Electronic Limited Slip	41
2002	291	40,490	Antilock/Traction Control/Electronic Limited Slip	26
2003	246	51,000	Service Brakes	16
2004	224	46,000	Service Brakes	12
2005	152	55,437	Service Brakes	3
2006	65	41,000	Service Brakes	3
2007	71	70,000	Air Bags	7
2009	48	41,000	Air Bags	3
2010	43	53,000	Air Bags	3
2011	67	45,000	Unknown Or Other	1
2012	46	25,371	Electrical System	7
2013	46	6,500	Air Bags	6
2014	132	3,032	Exterior Lighting	8
2015	67	1,800	Exterior Lighting	4
2017	77	35,000	Power Train	5

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