"How reliable is the 1999 Gmc Sierra?"

"Based on 720 NHTSA complaints, the 1999 Gmc Sierra has a median complaint mileage of 64000 miles. The most common issue is SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP."

1999 Gmc Sierra: Reliability Data

Q: "What are common problems with the 1999 Gmc Sierra?"

"The most frequently reported component in NHTSA complaints for the 1999 Gmc Sierra is SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP, accounting for a significant portion of the 720 total complaints filed."

Source: NHTSA — 720 complaints

720

Total Complaints

64,000mi

Median Mileage

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

Top Issue

Crash Reports

When Do Complaints Happen?

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

47,000 25th Percentile

64,000 Median Mileage

88,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

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

197

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

SERVICE BRAKES, HYDRAULIC

SERVICE BRAKES

STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS

VEHICLE SPEED CONTROL:ACCELERATOR PEDAL

SEATS

TIRES

POWER TRAIN:AUTOMATIC TRANSMISSION

VEHICLE SPEED CONTROL

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHILE DRVING VEHICLE AT VARIOUS SPEEDS & HIT A BUMP, THERE IS A SEVERE VIBRATION IN THE STEERING WHEEL. CONTROLING VEHICLE IS DIFFICULT WHEN THIS OCCURS. *AK"

"HEADLIGHTS GO OUT WHEN TIRE SPIN OR WHEN ANTI-LOCK BRAKES ARE ACTIVATED. *AK"

"BUCKET SEAT TRACKS PERTRUDE OUT FROM UNDER SEAT CREATING A SAFETY HAZARD DUE TO DESIGN FLAW."

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.

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP 197 complaints

25th: 45,250 mi Median: 57,000 mi 75th: 75,000 mi

SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE 33 complaints

25th: 39,850 mi Median: 52,152 mi 75th: 61,500 mi

SERVICE BRAKES, HYDRAULIC 29 complaints

25th: 50,350 mi Median: 72,000 mi 75th: 99,949 mi

SERVICE BRAKES 25 complaints

25th: 80,005 mi Median: 150,072 mi 75th: 162,250 mi

STRUCTURE:BODY:TAILGATE:HINGE AND ATTACHMENTS 21 complaints

25th: 69,000 mi Median: 81,750 mi 75th: 95,468 mi

Where Are Complaints Coming From?

Top states by complaint count.

NY: 66 MI: 60 TX: 57 OH: 45 PA: 39 CA: 31 FL: 28 ME: 23 AZ: 22 OK: 20

Who Files Complaints?

49.4%

Original Owners

50.6%

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	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	1
1992	33	-	VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR	2
1993	109	55,675	VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR	9
1994	221	110,000	VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR	3
1995	327	131,200	VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR	24
1996	310	83,000	VISIBILITY:WINDSHIELD WIPER/WASHER:MOTOR	20
1997	302	78,850	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	6
1998	230	74,500	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	19
2000	557	68,352	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	58
2001	333	50,000	SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP	41
2002	291	40,490	SERVICE BRAKES, HYDRAULIC: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
2008	84	68,850	AIR BAGS	4
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