"How reliable is the 1999 Gmc Sierra 2500?"

"Based on 42 NHTSA complaints, the 1999 Gmc Sierra 2500 has a median complaint mileage of 100000 miles. The most common issue is Service Brakes."

"What are common problems with the 1999 Gmc Sierra 2500?"

"The most frequently reported component in NHTSA complaints for the 1999 Gmc Sierra 2500 is Service Brakes, accounting for a significant portion of the 42 total complaints filed."

1999 Gmc Sierra 2500: Reliability Data

Source: NHTSA — 42 complaints

Total Complaints

100,000mi

Median Mileage

Service Brakes

Top Issue

Crash Reports

When Do Complaints Happen?

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

82,575 25th Percentile

100,000 Median Mileage

166,269 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Service Brakes

Antilock/Traction Control/Electronic Limited Slip

Service Brakes, Hydraulic

Fuel System, Gasoline

Tires

Transfer Case (4-Wheel Drive)

Tread/Belt

Front

Gear Box (Other Than Rack And Pinion)

Steering Wheel/Handle Bar

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"THE AUTOMATIC 4 WHEEL DRIVE ACTED ERRATICALLY CAUSING THE BACK END TO BECOME LOOSE AND RESULTING IN THE CONSUMER LOOSING CONTROL OF VEHICLE, SKIDED OFF ROAD AND HIT 2 FENCE POSTS. NLM"

"WHILE DRIVING ON LOCAL ROADS APPLIED BRAKES AND HEARD SQUEALING NOISE. CONTACTED DEALER AND WAS TOLD VEHICLE NEEDED NEW BRAKES. THEY WERE NOT UNDER WARRANTY. LATER, WHILE DRIVING DOWN THE ROAD, SLOWED DOWN TO MAKE A TURN, AND STEERING WHEEL WOULD NOT TURN. ALSO, THERE WAS NOISE IN THE STEERING..."

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 9 complaints

25th: 92,681 mi Median: 170,000 mi 75th: 171,500 mi

Service Brakes, Hydraulic 6 complaints

25th: 71,973 mi Median: 80,000 mi 75th: 170,000 mi

Where Are Complaints Coming From?

Top states by complaint count.

OH: 5 WI: 4 MA: 3 MI: 3 MD: 3 TX: 3 GA: 3 AZ: 2 FL: 2 LA: 1

Who Files Complaints?

28.6%

Original Owners

71.4%

Second+ Owners

Gmc Sierra 2500 — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
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
2008	77	71,800	Air Bags	6
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