2023 Chevrolet Silverado 1500: stuck in gear or won't shift

Filed Sep 24, 2026 · Engine, Transmission · TX

I drive a 2023 Chevrolet Silverado 1500 3.0L Diesel with the 10-speed transmission. The transmission control software failed to monitor/detect valve body wear or trigger a 5th-gear 'limp mode' safety net, resulting in three separate instances of sudden rear-wheel lockup at speed. The dealer was unable to replicate the issue during a service visit from 6/10 - XXX. The issue was raised as the transmission was shifting increasingly badly leading up to this service visit. The first full lockup occurred a few days after receipt of the vehicle on XXX driving eastbound on [XXX]. Off the gas, coasting downhill. Once everybody started speeding up, I increased the throttle gently and the truck shook violently. I initially thought I had been hit by another vehicle but realized it was the transmission. Speed was noted 24 mph. The second incident occurred XXX while traveling to [XXX]. Driving southbound between [XXX] and [XXX] at approximately 50 MPH in a coasting condition. Went to pass a slow vehicle and the vehicle jerked violently an locked the rear wheels. Initial assumption was that I had been hit. Was able to regain control and continue. The third incident occurredXXX while traveling from [XXX] to [XXX]. Driving eastbound on [XXX] at approximately 35 mph, when moving from a coast to acceleration posture, the vehicle again locked the rear wheels and jerked violently. Finally, onXXX when traveling southbound from [XXX] to [XXX], I stopped for fuel. When attempting to accelerate onto the freeway, the vehicle failed to engage 6 gear, stumbled, and then went into limp mode with a check engine light. On XXX a [XXX] dealer found code P0747 and addressed the issue with [XXX]. I was forced to rent a car to continue my journey to [XXX]. GM ultimately shipped my truck back to me one week later. The software 'fix' clearly did not work as intended and remains a serious safety hazard. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 1, 2026 · Electrical, Engine · FL

A valve on the 3.0L Duramax is allegedly sticking, causing the vehicle to go into limp mode or be inoperable. This is a known issue for GM and they have issued a service bulletin on it. Unfortunately, no dealers want to address the issue and now we are left with a vehicle that if we do not pay to repair, after it being ours for only 5 days, the vehicle will be unusable. This vehicle is under warranty still and this part is needed for operation. I believe this avoidance of a recall is harming customers and creating pay to drive schemes. This needs to be addressed before thousands of customers begin paying for a repair that GM knows is their fault.

Filed Jun 19, 2026 · Electrical, Transmission · FL

“Service transmission now unable to shift soon” message. Vehicle is stuck in park. Message appeared in May. Transmission stuck shortly after. Safety is at risk due to transmission being unable to shift due to faulty module that is widely reported and known to Chevrolet.

Filed May 29, 2026 · Transmission · PA

Transmission went out while driving on highway, entering limp mode. Ended up needing a valve body replacement at only 20k miles which was covered, but now I am having more transmission issues still with delayed forward engagement and slipping gears and it is only at 65k miles. Seems to be a lot of customers having the same issue. Took months for the truck to be fixed as "many other trucks" were waiting on the same part according to dealership.

Filed Mar 24, 2026 · Engine, Transmission · AR

The vehicle lost power and went into limp mode on 3/3. I had it transported to a dealership and they said there was metal containments in the motor. I got it back on 3/17 and they said all was well but it never drove right. It broke down again on 3/20 and the said the throttle body was out. Why had they not found this issue before? This seems to be a recurring issue with this model truck.

Filed Mar 23, 2026 · IL

The Def guage does not work properly. After topping off with DEF the guage would not register being full. Also the guage would read over half full and within minutes I would receive a notification that the truck was going into limp mode due to be out of DEF. Happened several time while on a trip. Also truck went into limp mode while DEF was full.

Filed Oct 2, 2025 · Engine, Fuel system · KS

The 2023 Chevrolet Silverado 1500 High Country has experienced multiple powertrain and transmission failures beginning shortly after purchase. The issues include violent shifting, hesitation, and stalling, particularly while accelerating or decelerating. These malfunctions create serious safety risks—especially when merging, turning left across traffic, or entering intersections. The truck has been returned to authorized GM dealerships multiple times for diagnostics and repair. GM service departments confirmed transmission faults but have not successfully resolved the issue despite repeated attempts. The same problems reoccur shortly after each repair. At times, the vehicle has entered “limp mode” unexpectedly while driving, causing a loss of power. On at least one occasion, this occurred while driving on a busy highway, forcing evasive action to avoid a collision. Warning lights such as the “check engine” light and service alerts frequently appear before or during these incidents. To date, the vehicle has been inspected by GM-certified technicians at authorized dealerships. A case has been opened with GM customer care and BBB AUTO LINE arbitration has been initiated. The truck remains unreliable and unsafe to operate, especially with children on board. The risk of sudden power loss or drivetrain malfunction poses a clear hazard to occupants and other drivers.

Filed Jul 16, 2025 · Transmission · TX

Was driving home and truck stuttered three times then went into limp mode, dropped truck off at dealership and was told it had a loose wire so they plugged it back in and charged me $200. Next day it happened again and brought it back when they told me my truck needed a replacement valve body. I've now been waiting over 2 months paying $858.18 a month for a truck I cant drive

Filed Jun 5, 2025 · Transmission · IA

I was towing my boat, attempting to get on a 4 lane highway via on ramp. Truck refused to shift and went into limp mode as I was attempting to merge. Vehicles behind me on the ramp and coming up behind had to slam on their brakes. Diagnosed as a bad valve body. The issue is very widespread across GM vehicles, GM has a national backorder on the valve body as there are a ton of vehicles waiting for them. GM has not issued a recall at this time.

Filed May 10, 2025 · Engine, Transmission · TX

This is the third time since the purchase date of July 2023, that my Diesel 1500 Silverado has gone into "Reduced Engine Power" while driving. The first date was August 2024, while traveling down the interstate. The check engine light came on. My maximum speed was reduced to 50mph, and the transmission shifting was very jerky. This was extremely dangerous with the flow of traffic traveling 70+ mph. I returned to the dealer where the vehicle sat on the lot for approximately 60 days awaiting the part (Valve Body) from GM. Components were repaired through warranty. Fast forward to February 2025, "Reduced Engine Power" notification came on again with the code P0747, P700. Returned to dealer, and after a week of sitting on the lot, the technician could not duplicate the code. I requested that a new fuel filter be replaced for piece of mind. Today, 3 mos. later, as I was backing out of my driveway, my truck did not shift/engage into Reverse. I was able to roll into the road & put it in Drive, however it went into "Reduced Engine Power." The vehicle will have to be towed, at my expense, I'm sure, to further diagnose the cause. The truck does not move when shifted into Reverse, and pressure is applied to the pedal. It is extremely concerning knowing a national recall on identical GM components has been reported, and yet I have had identical issues without resolution. Despite the known problems and safety risks, especially with a child in the vehicle during each failure, I’ve been left without consistent or timely support. I am requesting immediate assistance in diagnosing and repairing this vehicle, as well as a formal explanation of why this recurring issue has not triggered a broader response or replacement. At this point, I’m also considering pursuing further action through GM corporate or a consumer protection agency if a permanent resolution is not reached.

Filed May 9, 2025 · Transmission · AL

While driving at ~30 mph the rear wheels locked up momentarily with no warning and without applying the breaks. The back of the vehicle fish-tailed while the tires slid. Following the incident the check engine light came on and the vehicle went into limp mode and would not go more than about 25 - 30 mph. I immediately took it to the Chevrolet Dealer. The dealer indicated that the codes showed an issue with the transmission control module. It is currently at the dealer to be repaired. The vehicle has 51917 miles and is still under power train warranty. There was no warning or indication something was about to happen prior to the incident. The truck is a 2023 Silverado 1500 with the 2.7 liter Turbo engine with the GM 8 speed transmission.

Filed Apr 25, 2025 · Transmission · FL

On the freeway transmission downshifted to first, loud bang and skidding to limp mode vehicles behind us skidded off highway and others changed lane causing chaos yelling screaming angry drivers, not a great situation, I had the recall done, it was just a software update that detects a problem and puts it into dangerous limp mode at high speed.