"How reliable is the 2020 Gmc Sierra 2500?"

"Based on 106 NHTSA complaints, the 2020 Gmc Sierra 2500 has a median complaint mileage of 20450 miles. The most common issue is Power Train."

"What are common problems with the 2020 Gmc Sierra 2500?"

"The most frequently reported component in NHTSA complaints for the 2020 Gmc Sierra 2500 is Power Train, accounting for a significant portion of the 106 total complaints filed."

2020 Gmc Sierra 2500: Reliability Data

Source: NHTSA — 106 complaints

106

Total Complaints

20,450mi

Median Mileage

Power Train

Top Issue

Crash Reports

When Do Complaints Happen?

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

4,075 25th Percentile

20,450 Median Mileage

112,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Power Train

Unknown Or Other

Electrical System

Service Brakes

Engine

Steering

Body

Vehicle Speed Control

Exterior Lighting

Tires

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. WHILE DRIVING 5 MPH, THE BRAKES ENGAGED AUTOMATICALLY AND THE TRACTION CONTROL WARNING INDICATOR ILLUMINATED. THE VEHICLE WAS TAKEN SEVERAL TIMES TO CARL BLACK CHEVROLET BUICK GMC (LOCATED AT 1110 ROBERTS BOULEVARD NORTHWEST, KENNESAW, GA 30144, (888) 457..."

"TL* THE CONTACT OWNS A 2020 GMC SIERRA 2500. THE CONTACT STATED THAT WHILE DRIVING, HE NOTICED SMOKE ENTERING THE VEHICLE THROUGH THE AIR VENTS. THE CONTACT COASTED TO THE SIDE OF THE ROAD, EXITED THE VEHICLE SAFELY WITH HIS PASSENGER, UPON OPENING THE HOOD NOTICED THAT THE WHOLE ENGINE COMPARTMENT ..."

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.

Power Train 22 complaints

25th: 112,000 mi Median: 114,000 mi 75th: 125,000 mi

Service Brakes 12 complaints

25th: 571 mi Median: 1,000 mi 75th: 5,000 mi

Engine 10 complaints

Median: 2,800 mi

Where Are Complaints Coming From?

Top states by complaint count.

FL: 11 MI: 9 CA: 9 IN: 9 NY: 5 GA: 5 PA: 4 UT: 4 KS: 4 AR: 4

Gmc Sierra 2500 — Other Years

See how this model compares across different model years.

Year	Complaints	Median Mileage	Top Issue	Crashes
1999	42	100,000	Service Brakes	3
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
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