2020 Chevrolet Silverado 3500 power train problems
15 owner complaints filed with NHTSA name the power train on the 2020 Chevrolet Silverado 3500 — 38% of all complaints for this model year.
What owners report
“Since buying the vehicle I’ve had issues with the truck going into limp mode with codes p0700 as well as p0747. I have taken it to the dealership twice now, when it has arrived the codes were no longer there. Every time the truck went into limp mode the transmission would get stuck into 5th gear…”
filed Jul 6, 2026
“The transmission, without warning, intermittently locks the rear wheels when towing a 13,500 lb 5th wheel RV. It occurs when going uphill and the transmission downshifts to maintain torque. The "D" on the gear indicator on the dashboard also flashes 3-5 times. This is a known issue with the Allison…”
filed Apr 13, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Transmission control valve may fail and cause the rear wheels to lock upCampaign 26V083000 · Feb 12, 2026
- Transmission control valve may fail and cause the rear wheels to lock-upCampaign 24V797000 · Oct 24, 2024
Power Train problems in other Silverado 3500 years
| Year | Reports | Share |
|---|---|---|
| 2024 Silverado 3500 | 14 | 30% |
| 2022 Silverado 3500 | 3 | 11% |
| 2021 Silverado 3500 | 7 | 18% |
| 2019 Silverado 3500 | 5 | 24% |
| 2016 Silverado 3500 | 3 | 6% |
| 2015 Silverado 3500 | 5 | 10% |
| 2013 Silverado 3500 | 5 | 19% |
| 2012 Silverado 3500 | 1 | 4% |
| 2011 Silverado 3500 | 5 | 17% |
| 2007 Silverado 3500 | 3 | 8% |
| 2006 Silverado 3500 | 9 | 17% |
| 2005 Silverado 3500 | 4 | 9% |
Other reported problem areas on the 2020 Chevrolet Silverado 3500
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.