"How reliable is the 2020 Gmc Sierra 1500?"

"Based on 604 NHTSA complaints, the 2020 Gmc Sierra 1500 has a median complaint mileage of 15700 miles. The most common issue is Engine."

"What are common problems with the 2020 Gmc Sierra 1500?"

"The most frequently reported component in NHTSA complaints for the 2020 Gmc Sierra 1500 is Engine, accounting for a significant portion of the 604 total complaints filed."

2020 Gmc Sierra 1500: Reliability Data

Source: NHTSA — 604 complaints

604

Total Complaints

15,700mi

Median Mileage

Engine

Top Issue

Crash Reports

When Do Complaints Happen?

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

3,575 25th Percentile

15,700 Median Mileage

68,000 75th Percentile

What Fails?

Most reported component issues from NHTSA complaints.

Engine

183

Power Train

Electrical System

Service Brakes

Unknown Or Other

Steering

Fuel/Propulsion System

Suspension

Engine And Engine Cooling

Visibility/Wiper

Severity Assessment

Crashes

Fires

Injuries

Deaths

Sample Complaint Reports

"WHEN MAKING RIGHT TURNS IN THE DARK THE HEADLIGHTS DO NOT CAST LIGHT TO THE RIGHT SO YOU CAN SEE WHERE YOU ARE TURNING. THIS IS ESPECIALLY A PROBLEM IN THE RURAL WITHOUT STREETLIGHTS IT IS TOTALLY BLACK FROM THE DRIVERS SEAT LOOKING OVER THE RIGHT SIDE OF THE HOOD OR OUT THE RIGHT WINDOW."

"THE BACKUP CAMERA IS ENTIRELY TOO BRIGHT AT NIGHT. IT IS NEARLY IMPOSSIBLE TO SEE THE MIRRORS DUE TO THE BRIGHTNESS"

"TL* THE CONTACT OWNS A 2020 GMC SIERRA 1500. THE CONTACT STATED THAT WHILE DRIVING AT 52 MPH, THE BRAKE PEDAL WAS DEPRESSED BUT WAS VERY FIRM. THE PARK BRAKE WAS ACTIVATED BUT FAILED TO EFFECTIVELY STOP THE VEHICLE. THE VEHICLE WAS COASTED TO A PARKING LOT AND WAS PUT IN PARK. THE BRAKE SYSTEM FAILU..."

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.

Engine 183 complaints

25th: 5,325 mi Median: 40,624 mi 75th: 73,250 mi

Power Train 78 complaints

25th: 6,500 mi Median: 46,000 mi 75th: 75,387 mi

Electrical System 70 complaints

25th: 238 mi Median: 5,000 mi 75th: 12,650 mi

Service Brakes 46 complaints

25th: 1,950 mi Median: 5,000 mi 75th: 13,000 mi

Unknown Or Other 41 complaints

25th: 786 mi Median: 5,500 mi 75th: 9,175 mi

Where Are Complaints Coming From?

Top states by complaint count.

TX: 89 MI: 65 FL: 40 CA: 40 LA: 23 GA: 19 OK: 18 PA: 17 NY: 17 MN: 17

Who Files Complaints?

0.3%

Original Owners

99.7%

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
1999	182	108,894	Service Brakes, Hydraulic	10
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
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