"How reliable is the 1999 Gmc Sierra 1500?"

"Based on 182 NHTSA complaints, the 1999 Gmc Sierra 1500 has a median complaint mileage of 108894 miles. The most common issue is Service Brakes, Hydraulic."

"What are common problems with the 1999 Gmc Sierra 1500?"

"The most frequently reported component in NHTSA complaints for the 1999 Gmc Sierra 1500 is Service Brakes, Hydraulic, accounting for a significant portion of the 182 total complaints filed."

1999 Gmc Sierra 1500: Reliability Data

Source: NHTSA — 182 complaints

182

Total Complaints

108,894mi

Median Mileage

Service Brakes, Hydraulic

Top Issue

Crash Reports

When Do Complaints Happen?

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

65,000 25th Percentile

108,894 Median Mileage

154,919 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Service Brakes, Hydraulic

Service Brakes

Hoses, Lines/Piping, And Fittings

Antilock/Traction Control/Electronic Limited Slip

Seats

Electrical System

Control Unit/Module

Unknown Or Other

Body

Suspension

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHEN APPLYING THE BRAKES WHILE COMING TO AN INTERSECTION, IF ONE OF THE REAR TIRES HIT A TAR STRIP, CHUCK HOLE OR BUMP IN THE PAVEMENT, THE TRUCK GOES INTO ABS BRAKING, REDUCING STOPPING DISTANCE, WHICH COULD CAUSED A CRASH. THE PROBLEM HAS BEEN REPORTED TO THE DEALERSHIP. DEALER STATED THAT THE SYS..."

"ON JAN. 14, 2000. MY ABS AND BRAKE WARNING LIGHTS CAME ON. BOTH THE ELECTRONIC BRAKE CONTROL MODULE AND MASTER CYLINDER WERE DEFECTIVE. THEY WERE REPLACED BY DEALER. NOW BRAKES GO TO FLOOR. PULL TO RT, AND ARE MUSHY. I THINK THE REPLACEMENT PARTS ARE DEFECTIVE, BUT THE DEALER SAYS THEY WON'T DO ANYM..."

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 37 complaints

25th: 80,621 mi Median: 102,000 mi 75th: 141,084 mi

Service Brakes 30 complaints

25th: 115,643 mi Median: 152,446 mi 75th: 202,904 mi

Hoses, Lines/Piping, And Fittings 14 complaints

25th: 47,777 mi Median: 72,343 mi 75th: 125,473 mi

Antilock/Traction Control/Electronic Limited Slip 14 complaints

25th: 38,695 mi Median: 42,122 mi 75th: 99,125 mi

Seats 10 complaints

25th: 21,250 mi Median: 55,675 mi 75th: 80,987 mi

Where Are Complaints Coming From?

Top states by complaint count.

PA: 20 OH: 17 MI: 12 IN: 11 NJ: 10 NY: 8 KY: 8 MD: 8 IL: 8 WI: 7

Who Files Complaints?

16.5%

Original Owners

83.5%

Second+ Owners

Gmc Sierra 1500 — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1997	100	80,000	Steering	0
1998	68	80,500	Antilock/Traction Control/Electronic Limited Slip	6
2000	215	93,000	Service Brakes, Hydraulic	15
2001	171	98,000	Service Brakes	14
2002	192	76,741	Service Brakes	20
2003	210	72,075	Service Brakes	15
2004	253	57,192	Instrument Cluster/Panel	12
2005	218	73,150	Electrical System	6
2006	182	54,400	Service Brakes	12
2007	310	67,500	Air Bags	11
2008	438	75,000	Air Bags	13
2009	278	65,114	Air Bags	5
2010	215	60,000	Air Bags	1
2011	362	56,000	Air Bags	9
2012	143	60,000	Air Bags	7
2013	147	72,000	Unknown Or Other	2
2014	1020	58,500	Steering	39
2015	914	46,000	Service Brakes	29
2016	436	47,417	Service Brakes	14
2017	465	38,900	Power Train	22
2018	405	33,000	Power Train	16
2019	783	10,000	Engine	19
2020	604	15,700	Engine	15
2021	617	43,500	Engine	7
2022	617	39,000	Engine	8
2023	470	20,000	Engine	9
2024	365	15,400	Engine	5
2025	109	16,500	Engine	7
2026	50	-	Engine	0

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