2020 CHEVROLET SILVERADO 1500 Complaints

The contact owns a 2020 Chevrolet Silverado 1500. While operating in negative (-41°F) degree winter conditions, the "Service Emission System" entered an EPA-mandated speed limitation in LIMP Mode messages were displayed. Dealer diagnostics confirmed DTC: P20B9 (Heater Control Circuit Open) and P20C1. The failure was identified as the melting of the Diesel Exhaust Fluid (DEF) tank electrical connector due to undersized terminal pins overheating (Joule heating). The contact stated that it was a latent design defect that posed a fire risk and a safety hazard due to sudden loss of motive power in arctic climates (-45°F). General Motors acknowledged the defect in 2500HD models, Special Coverage: N212342980; but excluded the 1500 models. The failure mileage was 29,354.

I own a 2020 Chevy Silverado 1500, the truck currently has 51,400 miles on it. I started noticing a vibration while driving home from work that continued to get worse. After some quick online research I learned that the torque converter on the newer Chevy and GMC trucks is a weak point in their assembly. This is a very common issue and complaint for owners. The manufacturer has done nothing to resolve it or honor repairs on the defective product. My truck was one month out of the 5 year/60,000 mile warranty, they would not honor repairs because it was outside of the time window. The internal parts break up and destroy a transmission. Luckily i caught it early enough before it caused my transmission to fail while driving. I do not have the part with me. I took the truck to a shop for repairs and they did not return the defective part. No warning lights came on the dash.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while his son was driving 75 MPH, there was a knocking sound coming from the vehicle. The driver pulled over and turned the vehicle off, but the vehicle failed to restart. The check engine warning light was illuminated. Upon researching the failure, the contact associated the failure with NHTSA Campaign Number: 25V274000 (Engine and Engine Cooling). The vehicle was towed to the local dealer, where it was diagnosed and determined that the engine had seized. The vehicle was not repaired. The manufacturer was contacted and confirmed that there was no recall coverage on the VIN for the failure. The failure mileage was approximately 165,000.

6L80 transmission shift flared when shifting from 2nd to 3rd gear and shuddered when driving at 45 - 50 mph and about 1400 rpm’s. The Torque Converter Clutch was spasming out causing the the torque converter to shudder which caused the torque converter to overheat at 250 degrees therefore exploding the torque converter that shot metal inside of the transmission blowing it up.

Bad shuttering, slow acceleration, clunking noise, check engine light flashing all started while driving home. Took it to a transmission shop and they said it was the TC and transmission. I then called the dealership to see if there was a recall, and looked up any recalls. Since I have had fluid flushed and changed, and still have the problems. This has been an on going problem for a couple of years now. It was just out of warranty for dealership to fix. It started while I was on a highway and had very poor acceleration control.

The contact owns a 2020 Chevrolet Silverado 1500. The contact stated that while driving approximately 65 MPH, the vehicle started to hesitate with several unknown warning lights illuminated. The contact stated that there was a misfire in the engine, and her husband pulled off the roadway and turned off the vehicle. The vehicle was restarted and driven back to the residence at speeds no greater than 50 MPH. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that the left engine lifters had collapsed and needed to be replaced. The contact was advised by the dealer that the right-side engine lifters should be replaced while the engine was disassembled. The vehicle was not yet repaired. The manufacturer was informed of the failure. The failure mileage was approximately 96,000.

The truck had a lifter failure which caused the pushrod to bend damaging the camshaft as well. I spent $5000 dollars just for the problem to happen again. I’ve have spent nearly $10000 on this issue. This not something you expect from a truck that you pay nearly $60000 for.

Intermittent and sudden loss of power steering. The only message displayed briefly then went out was “service trailer brake controller”. Brought vehicle to Dealership. The grounding strap behind the front right wheel that goes to the frame (Earth Strap) was rotted. This seams to be a very common problem with this model truck and is dangerous.

Engine Failure 6 Nov 2025 Yes, engine is available for inspection. Possible loss power, unable to control the vehicle. Vehicle engine failure has been confirmed by dealership, Ruben Milton Chevrolet and Jim Hudson Cadillac in Augusta Georgia. Vehicle has not been inspection by manufacturer, police, insurance representatives. No warning light, no knocking noise, no messages on dashboard.

GM declared my original engine as unfixable and decided to replace my engine luckily with 2 weeks remaining in warranty. It had similar clicking noise to everything else I've seen related to this 6.2L having issues. It currently has a new engine that can be inspected if need be. As well as receipt given to me from Klein Chevy from engine replacement. My engine could've failed while driving if I didnt notice the clicking noise prior to getting it looked at. Putting other in danger if driving on a public roadway. Yes the noise/defect was reproducible upon dealer looking at it. Unsure if the vehicle was inspected by the actual manufacturer but they removed my motor and sent it back to the factory. Was never inspected by police or insurance that im aware of There was no check engine light or warning lamps, only thing I noticed was a clicking noise that the common layman would have probably missed, they appeared roughly around 46,000 miles.