2024 Chevrolet Silverado 2500: stuck in gear or won't shift

Filed Apr 5, 2026 · Transmission · CA

While driving the vehicle, the vehicle jolted and made a clunk noise. The check engine light came on accompanied by a message on the Dash stating "Reduce acceleration, Drive with Care". The vehicle went into "limp mode", and appeared to be engaged in a single gear. The vehicle was traveling at approximately 30 mph when the transmission malfunctioned. The vehicle was taken to my local Chevy dealer, where they scanned the vehicle and determined that the Valve Body was the issue, based on the scan result. The vehicle is a 2024 Chevy Silverado 2500HD (Gas). It has 29k miles on it. The vehicle was purchased as a "certified Pre-owned" (lease return). Within 20 miles of being driven from the dealer after purchase, I experienced a jolt & clunk. The failure occured 42 miles later.

Filed Mar 24, 2026 · Transmission · IN

While driving in heavy interstate traffic on March 18, 2026, the vehicle suddenly downshifted hard to 2nd gear, locking the rear wheels and causing the vehicle to slide out of my lane. The truck then entered limp mode and appeared to be stuck in 2nd gear. I immediately called my chevy dealer to make an appointment to drop the truck off. While researching, I found there was a recall for the same vehicle symptoms, but my truck falls outside of the recall. The truck is currently at the dealership for a valve body replacement, due to a KNOWN issue with the Allision transmission where TSB's have been issued. Chevrolet should be more proactive and recall the trucks, and replace the transmissions instead of a bandaid fix, before someone with less driving awareness/experience is involved in an accident

Filed Mar 19, 2026 · Transmission · 55,000 miles · NY

The contact owns a 2024 Chevrolet Silverado 2500. The contact stated that on two occasions while driving at various speeds, the vehicle went into LIMP Mode with an audible chime, and several undisclosed messages displayed on the instrument panel. Due to the failure, the vehicle was turned off, and the battery terminals were disconnected for several minutes before being reconnected. The vehicle resumed to normal functionality and the warning lights independently turned off after driving for a while. The vehicle was taken to an independent mechanic who discovered several diagnostic trouble codes associated with the transmission control module. Neither the dealer nor the manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 55,000.

Filed Mar 4, 2026 · Transmission · TN

While accelerating to merge onto the highway, the transmission attempted a shift twice and could not complete the shift. That process causes an aggressive deceleration with each shift attempt. It then slowed, turned on the check engine light and displayed "Reduced Power Mode" - i.e. went into limp mode. The dealer pulled code P0747. The repair is a full transmission rebuild. I did not experience wheel lock up like other people have, but this is the same problem that has been heavily documented.

Filed Feb 4, 2026 · Transmission · 54,000 miles · AL

The contact owns a 2024 Chevrolet Silverado 2500. The contact stated that while driving at various speeds, the vehicle entered LIMP Mode. During the failure, the transmission became stuck in 5th gear, and the vehicle operated at reduced speeds. The vehicle was turned off but failed to immediately restart. After approximately 15 minutes, the vehicle restarted, and the failure was self-corrected. The failures had occurred while hauling a heavy load and while not carrying a load. The message "Decreased Acceleration" was displayed, and the check engine warning light was illuminated. The vehicle was taken to the local dealer, who was unable to determine the cause of the failure. The transmission fluid was flushed and refilled, but the failure persisted. The manufacturer was not yet notified of the failure. The failure mileage was 54,000.

Filed Jan 24, 2026 · Electrical, Engine · PR

The check engine light goes on continously and it goes to limp mode. The truck cannot be driven daily and most of the time is in the dealer fixing the updates or computer. It is not an equipment problem but a computer problem.

Filed Jun 17, 2025 · Transmission · MI

Truck went into “Reduced Acceleration” or “Limp Mode” while pulling my camper. Took truck to Kool Chevrolet in Grand Rapids, MI. They confirmed it is a bad Valve body on the transmission. No estimated time from Chevy on getting a replacement valve body. They confirmed this is a widespread known issue and could be weeks if not months. I have a family camping trip planned for the upper peninsula of Michigan in mid July and they aren’t giving not giving me any indication that I could have my truck back by then.

Filed Jun 13, 2025 · Transmission · TX

Driving on interstate 10 in Arizona transmission suddenly shifted down hard and then into limp mode with Check engine light. Took to Auto Nation Gilbert Az May 10th they diagnosed valve body failure. Safety was at risk to to vehicle suddenly slowing down in heavy traffic.

Filed Jan 17, 2025 · Transmission · TX

I crossed over the west bound lanes and turned left in the east bound lanes and under slight acceleration when my truck started jerking as if i was braking/accelerating back and forth. My diesel engine then went into limp mode and my transmission was stuck in a low gear and would not shift. I could only drive approximately 20 mph at 3000rpm. The people coming up behind me had to slow down because i couldn't pull over.

Filed Dec 20, 2024 · Transmission · PA

Limp mode; check engine light on and dealer stated valve body needs replacement, parts on national back order. Truck does not have even 300 miles on it!