2020 GMC Sierra 1500 Electrical System Problems
Owners have filed 81 complaints with NHTSA about electrical system problems on the 2020 GMC Sierra 1500, 17% of all complaints for this model year. Half of the reports with a mileage happened before 5,100 miles.
- 81electrical system complaints
- 5,100median miles at failure
- 0mention a crash
- 1mention an injury
- 1related recalls
- 53%of reports with a speed happened at 50+ mph
At what mileage do electrical system problems happen?
Based on 27 complaints that reported the odometer reading.
How serious are the reports?
Of 81 complaints, 2 a fire, 1 an injury.
GMC Sierra 1500 electrical system complaints by model year
| Model year | Electrical System complaints | Share of that year | Median miles |
|---|---|---|---|
| 2026 Sierra 1500 | 17 | 12% | 4,300 |
| 2025 Sierra 1500 | 25 | 21% | 25,319 |
| 2024 Sierra 1500 | 42 | 11% | 19,170 |
| 2023 Sierra 1500 | 64 | 13% | 23,250 |
| 2022 Sierra 1500 | 83 | 14% | 51,000 |
| 2021 Sierra 1500 | 75 | 13% | 31,150 |
| 2020 Sierra 1500 | 81 | 17% | 5,100 |
| 2019 Sierra 1500 | 95 | 15% | 7,997 |
| 2018 Sierra 1500 | 43 | 14% | 36,000 |
| 2017 Sierra 1500 | 54 | 15% | 53,000 |
| 2016 Sierra 1500 | 54 | 16% | 66,000 |
| 2015 Sierra 1500 | 96 | 13% | 46,000 |
| 2014 Sierra 1500 | 129 | 17% | 63,200 |
| 2013 Sierra 1500 | 6 | 5% | 55,500 |
| 2012 Sierra 1500 | 8 | 7% | 141,000 |
| 2011 Sierra 1500 | 17 | 6% | 124,000 |
| 2010 Sierra 1500 | 10 | 6% | 100,993 |
| 2009 Sierra 1500 | 20 | 9% | 65,000 |
| 2008 Sierra 1500 | 31 | 8% | 57,880 |
| 2007 Sierra 1500 | 22 | 8% | 43,000 |
| 2006 Sierra 1500 | 20 | 14% | 86,000 |
| 2005 Sierra 1500 | 67 | 38% | 70,000 |
| 2004 Sierra 1500 | 81 | 38% | 51,804 |
| 2003 Sierra 1500 | 43 | 24% | 72,151 |
| 2002 Sierra 1500 | 3 | 2% | 252,000 |
| 2001 Sierra 1500 | 7 | 5% | 62,000 |
| 2000 Sierra 1500 | 5 | 3% | 143,500 |
| 1999 Sierra 1500 | 8 | 5% | 90,000 |
| 1998 Sierra 1500 | 3 | 5% | 57,000 |
| 1997 Sierra 1500 | 2 | 2% | 191,065 |
| 1996 Sierra 1500 | 1 | 20% | 140,000 |
When owners reported it
Related recalls (1)
Electrical system:12v/24v/48v battery:cables
Problem: General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks. The battery positive (B+) cable rings may have been manufactured with excessive glue, potentially causing an intermittent electrical connection between the B+ cable and alternator.
Risk: An intermittent electrical connection between the B+ battery cable and the alternator could cause the vehicle to stall, increasing the risk of a crash. The intermittent connection could also lead to electrical arcing, which could generate sufficient heat to damage surrounding material, increasing the risk of a fire.
Fix: GM will notify owners, and dealers will inspect for the presence of glue or other contamination at the B+ cable attachment to the alternator and clean the connection and reattach the B+ cable connection, as necessary. If arcing has damaged the cable, nut, or alternator, the dealer will replace the damaged components. All services will be performed free of charge. GM issued owners an interim notification on February 4, 2020. GM issued second notice and the recall began March 9, 2019. Owners may contact Chevrolet customer service at 1-800-222-1020 or GMC customer service at 1-888-988-7267. GM's number for this recall is N192273510.
What owners report
Short excerpts of recent complaints, with personal details removed. Full reports are on NHTSA.gov.
The contact owns a 2020 GMC Sierra 1500. The contact stated that the vehicle failed to start intermittently and needed to be jumpstarted. The vehicle was taken to the dealer, and it was determined that there was corrosion on the ground wire which caused the failure. The vehicle was not repaired…
6 months after owning it the lifters went bad got them Fixed then they immediately went bad again also bent rods then a day after getting that fixed again the oil pump went bad it was issue after issue
5/5/25 woke up back seat entire truck flooring soaking wet back glass cracked. 4/8/25 transmission went out 117,000 miles 7/3/25 exhaust leak and placed nox 1. 7/8/25 127551 mileage exhaust leak replace gaskets, belt , tensioner, and pulley, 6/8/2025 3 knock sensors replaced and replaced intake…
Frequently asked questions
Do all 2020 GMC Sierra 1500s have electrical system problems?
No. NHTSA has 81 owner complaints about electrical system for the 2020 GMC Sierra 1500 (17% of the 479 complaints for this model year). Complaint data shows that the problem is reported, not how many of all cars sold are affected.
Was there a recall on the 2020 GMC Sierra 1500 electrical system?
Yes: 1 safety recall list electrical system. Check your VIN on NHTSA.gov to see whether the fix was done on your car.
At what mileage do electrical system problems start?
The median reported mileage is 5,100 miles: half of the reports with a mileage came before that.
Other 2020 GMC Sierra 1500 problems
- Engine problems (240)
- Power Train problems (98)
See all 2020 GMC Sierra 1500 problems or electrical system problems across all Sierra 1500 years.