"How reliable is the 1999 Gmc Sonoma?"

"Based on 78 NHTSA complaints, the 1999 Gmc Sonoma has a median complaint mileage of 55000 miles. The most common issue is SEATS:FRONT ASSEMBLY:RECLINER."

"What are common problems with the 1999 Gmc Sonoma?"

"The most frequently reported component in NHTSA complaints for the 1999 Gmc Sonoma is SEATS:FRONT ASSEMBLY:RECLINER, accounting for a significant portion of the 78 total complaints filed."

1999 Gmc Sonoma: Reliability Data

Source: NHTSA — 78 complaints

Total Complaints

55,000mi

Median Mileage

SEATS:FRONT ASSEMBLY:RECLINER

Top Issue

Crash Reports

When Do Complaints Happen?

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

45,000 25th Percentile

55,000 Median Mileage

100,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

SEATS:FRONT ASSEMBLY:RECLINER

POWER TRAIN:AUTOMATIC TRANSMISSION

AIR BAGS:FRONTAL

STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP

VEHICLE SPEED CONTROL

UNKNOWN OR OTHER

FUEL SYSTEM, GASOLINE

STRUCTURE:BODY:BUMPERS

SERVICE BRAKES

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHENEVER TURN SIGNAL IS ACTIVATED, DAY TIME RUNNING LIGHTS GO OUT. AFTER TURN SIGNAL GOES OFF, DAYTIME RUNNING LIGHTS COME BACK ON. DEALER/ MANUFACTURER ARE AWARE OF THE PROBLEM. PROBLEM HAS NOT BEEN CORRECTED. *AK *ET"

"WHILE DRIVING AT 10 MPH CONSUMER WAS HIT HEAD-ON BY ANOTHER VEHICLE ON DRIVER'S SIDE. UPON IMPACT, DRIVER'S SIDE AND PASSENGER'S SIDE AIR BAGS DIDN'T DEPLOY. DRIVER SUSTAINE D LOWER BACK INJURY. IS CURRENTLY IN PHYSICAL THERAPY. *AK"

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.

STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS 4 complaints

Median: 48,000 mi

Where Are Complaints Coming From?

Top states by complaint count.

FL: 15 OH: 7 MI: 6 NY: 5 TN: 5 AK: 4 CT: 3 VA: 3 SC: 3 MO: 2

Who Files Complaints?

44.9%

Original Owners

55.1%

Second+ Owners

Gmc Sonoma — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1991	35	-	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	3
1992	33	-	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	3
1993	72	-	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	8
1994	297	115,000	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	23
1995	254	96,500	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	35
1996	190	94,325	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	34
1997	160	54,000	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	20
1998	202	68,180	VISIBILITY:WINDSHIELD WIPER/WASHER	15
2000	180	60,000	STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS	17
2001	108	52,724	STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS	9
2002	74	37,900	STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS	2
2003	53	44,119	SERVICE BRAKES, HYDRAULIC	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