2016 Chevrolet Silverado 2500: check engine light

Filed Mar 10, 2026 · Transmission · CA

the vehicle developed a extremely hard down shift and then a check engine light came on. the vehicle went into limp mode, took the vehicle to local diesel mechanic and i was informed that the transmission was bad and had to be replaced, while replacing the transmission i was also told the transfer case was making noise and needed to be replaced. this happened in November of 2025 and the parts are not available. This happened while i was towing our trailer across a bridge when the traffic came to a sudden stop, once traffic started moving we could not get up to speed thus causing a traffic hazard. yes the repair shop was able to recreate the issue there were no warnings prior to the failure. I know GM has had issues with transmissions in newer models, i did not know that there was a process like this prior to getting my vehicle repaired and i needed it repaired as soon as possible. that is why i went to and independant repair facility.

Filed May 2, 2025 · Transmission · ID

Transmission was acting funny. Check engine light came on. Took it to a reputable transmission shop who stated it needs a full rebuild due to bad torque converter. $5500. The truck only has 65k mi.

Filed Mar 18, 2025 · Fuel system · 32,000 miles · CO

The contact owns a 2016 Chevrolet Silverado 2500. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The contact used a diagnostic scanner and retrieved DTC: P21DD. The vehicle was taken to the dealer, where the redundant tank reservoir and module kits were replaced; however, the failure persisted. The contact used a diagnostic scanner and retrieved DTC: P205B. The vehicle was taken to Abel Chevrolet (280 N Front St, Rio Vista, CA 94571), where the redundant tank assembly was replaced under GM Campaign Number: N192210260. The vehicle was repaired. The contact stated that he was concerned that the repair was a temporary fix. The manufacturer was notified of the failure, and a case was filed. The manufacturer referred the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 32,000.

Filed Dec 27, 2024 · Transmission · CT

At only 71,000 miles the 6L90 transmission had to be replaced in my Silverado because of slippage in fifth, sixth and heavy metal shaving showing in the pan. I have never plowed with this truck or abused the transmission. I've only towed up to 7,000 lbs which is well within specifications. As I continue to talk with other owners of the 6L90 and various mechanics, it has become evident that this particular transmission has a very high failure rate. Unfortunately the core to the failed transmission has already been returned, but what if something major internally failed that locked up the drivetrain and caused an accident? My mechanic John Portal has replaced several 6L90's with multiple types of failures. The only warning I received from the transmission was an engine light which only appeared after the transmission started to fail.

Filed Sep 24, 2024 · Electrical, Steering · WI

- Electronic power steering assist malfunctioning. Available for inspection - Vehicle jerks steering to the left or right at highway speeds, causing near miss accidents. - Dealer performed alignment and did not know how to fix. They were able to replicate the issue. - No other inspection - "Service Power Steering Drive With Care" message intermittently displays and almost immediately goes away. No check engine light or other warning lights.

Filed Oct 9, 2020 · Engine · 79,500 miles · FL

Check engine light came on throwing p203b code, which is the reductant level sensor code. This seems to have been an issue already in these vehicles dating back to 2011 when it started. I found a service bulletin #14652a regarding the replacement of such sensor but the dates on the vehicles only state 2011-2012. I want to see if there is a newer bulletin released which covers the later years with the same problem.

Filed Apr 24, 2018 · Engine, Fuel system · 34,500 miles · KS

I am on a cross country trip and the vehicles engine light came on, I pulled into a chevy dealer for service. Chevy dealer claims the part needed for repair called an ECM module, (I.e. Computer) is not available and it is not being produced because of a defect in design. The vehicle has been with a chevy dealer for 10 days. I am 1100 miles from home and general motors has refused to give me a loaner to drive back to kansas city. In talking with the diesel technicians at two of the dealers, they claim this is a widespread problem that gm is trying to hide.