2020 Chevrolet Silverado 3500 HD: common problems and reliability

The 2020 Chevrolet Silverado 3500 HD has 28 owner-filed NHTSA complaints and 8 recalls on record. The most-reported areas are power train and service brakes. Owners most often flag transmission valve body failure (10-speed allison, gas models) — causes the truck to buck, enter limp mode, fail to shift, and become undriveable. part is on national backorder, leading to repair delays of weeks or months. primarily affects 2024-2025 models. frequency: very frequent.

Safety record for the 2020 model year

28
Owner complaints
8
Recalls
1
Crash reports
1
Fire reports

Source: NHTSA complaints and recalls filed for 2020 Chevrolet Silverado 3500 HD vehicles (US, public record).

Where owners report problems

power train
9
service brakes
8
engine
6
electrical system
5
fuel/propulsion system
3

Recalls affecting the 2020 Silverado 3500 HD

latches/locks/linkages:hood:latch

Campaign 20V142000

General Motors LLC (GM) is recalling certain 2020 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 vehicles. The hood-latch striker wires may not have been heat-treated properly, possibly causing them to fr…

seat belts

Campaign 20V792000

General Motors, LLC (GM) is recalling certain 2019-2021 Chevrolet Silverado 1500 and GMC Sierra 1500, 2021 Chevrolet Suburban and Tahoe and GMC Yukon XL and 2020-2021 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500…

air bags:side/window:curtain:inflator

Campaign 20V446000

General Motors, LLC. (GM) is recalling certain 2020 Buick Enclave, Cadillac XT5 and XT6, Chevrolet Blazer, Silverado 1500, 2500 and 3500 and Traverse and GMC Acadia and Sierra 1500, 2500 and 3500 vehicles. The diffuser c…

seat belts:pretensioner

Campaign 19V814000

General Motors LLC (GM) is recalling certain 2019-2020 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2020 Silverado 2500, Silverado 3500, Sierra 2500, and Sierra 3500 vehicles equipped with carpet floor covering. Whe…

What owners say across generations

Sentiment is mixed and heavily dependent on model year and powertrain. For older models (circa 2000-2019) equipped with the 6.0L gasoline V8 and corresponding transmissions (e.g., 6L90), owner feedback is overwhelmingly positive regarding long-term reliability

  • Transmission Valve Body Failure (10-speed Allison, gas models) — Causes the truck to buck, enter limp mode, fail to shift, and become undriveable. Part is on national backorder, leading to repair delays of weeks or months. Primarily affects 2024-2025 models. Frequency: very frequent.
  • Engine/ECM Software Issues (6.6L Duramax L5P Diesel) — Multiple reports of check engine lights, reduced power, limp mode, and error codes (e.g., P060C, P133B, P133D) related to software anomalies. A specific service bulletin (PIP6066A) acknowledges the problem with no immediate fix, eroding owner trust. Frequency: very frequent.
  • CP4 High-Pressure Fuel Pump Failure (Duramax Diesel) — Known failure point that can destroy all eight fuel injectors with metal debris. Mitigated by using fuel with higher biodiesel content or aftermarket lubricity additives. Frequency: recurrent (discussed as a known risk).
  • Electrical & Infotainment Gremlins — Range from complete battery/charging system failures (2016 model) and dashboard/infotainment blackouts/resets (2015 model) to Bluetooth/Android Auto connectivity dropouts (2025 model). Often difficult to diagnose, pointing to wiring harness or module issues. Frequency: recurrent.
  • Four-Wheel Drive System Failures — Multiple reports across older generations (2001, 2003) of 4WD failing to engage, linked to faulty actuators, encoder motors, or transfer case issues. Frequency: recurrent.

Owner insights cover all generations of the Silverado 3500 HD.

Other Silverado 3500 HD model years

2024 Silverado 3500 HD2017 Silverado 3500 HD2015 Silverado 3500 HD2011 Silverado 3500 HD2007 Silverado 3500 HD2003 Silverado 3500 HD
Full Chevrolet Silverado 3500 HD owner reportCompare against another car