2019 GMC Sierra 1500: stuck in gear or won't shift

Filed Jul 13, 2026 · Engine, Fuel system · AL

The engine went into limp mode as I made turn leaving the damn I was is in town and it was a lot of traffic could’ve been bad if I didn’t pull into the median left me devastated and no crank no start I’ve only had the truck a year it went down a month from when I purchased it

Filed Mar 30, 2026 · Engine · AL

Engine knocking, constantly kicking into limp mode, shaking when driving. Taken to GMC and local repair shops. Limp mode will not stop kicking on. Now other issues will mean total engine replacement needed. Mechanic says it’s not worth repairing at this point. Only 109k miles on it.

Filed Dec 23, 2025 · Engine · AL

While traveling in high-speed traffic, the vehicle experienced a sudden and catastrophic mechanical engine failure without any prior warning lamps, messages, or symptoms. The failure manifest as a loud, rhythmic ticking and knocking noise immediately followed by a sudden loss of propulsion and severe engine shuddering. Safety Risk: The loss of power occurred in active traffic, creating an immediate crash hazard. Because the engine could no longer maintain speed, I experienced multiple near-miss collisions while attempting to navigate the vehicle to safety. This "limp mode" state placed myself and other motorists at extreme risk of a rear-end or side-impact collision. Component & Inspection: The failed component is the engine (6.2L L87 V8), specifically believed to be a failed lifter or bearing within the Dynamic Fuel Management system. The vehicle and its engine are currently available for inspection. Confirmation: The problem has been confirmed by a certified dealership service center. Diagnostic codes include P0300 (Random Misfire) and P0016. The dealership identified the symptoms as consistent with internal mechanical failure.

Filed Aug 23, 2025 · Transmission · IN

My truck is currently experiencing shuddering when driving. This happens at random times but is becoming more frequent. I have taken it into service shops on numerous occasions, and they have not been able to identify the cause due to my truck not exhibiting these conditions when they are diagnosing it. I have run out of funds to continually pay for diagnostic fees, so I have had to let it go until recently. Now it shudders, shifts very harshly, rpms fluctuate continuously, knocking noise when driving, and in the mornings when I first leave for work, my truck will not shift out of first without revving high in rpms. I took it to a mechanic and was told that it was my torque converter, which has now damaged my transmission. All of which I have to pay for out of pocket. These symptoms started when my vehicle was still under warranty (around 30,000 miles). I even flushed the transmission, and it did not help. This is my daily driving truck, and I use it to go to work and transport my 3 young children around. Most of our driving is done on the highway at high speeds (70 mph). When my truck shudders or shifts harshly, I feel that it is going to cause me to lose control or wreck, putting not only my life but my children's lives in danger. I have not consulted a lawyer, as I do not have enough money to do so. I have not had the manufacturer look at it, because when I called about it, they told me I would have to pay for all service fees since it is out of warranty. The only warning lamps I get is when it goes into limp mode (which is at least once or twice a month) and by the time I used to get it to a mechanic, the light was off and they said there is nothing they could do about it. All of this has been happening to some degree since it was around 30,000 miles and only getting worse. The fact that I have put over $20,000 into this (not including my monthly payments of $990) and now have to replace the transmission & torque converter is ridiculous.

Filed Apr 10, 2025 · Transmission · OH

Transmission has been failing for the life of this vehicle. Shuttered shifting and hard shifting are the norm. It is available for inspection. Vehicle does not shift properly when vehicle is in motion. Shifting is often delayed resulting in temporary loss of power. I have had the vehicle in to a transmission shop they have been able to reproduce the events. There are no warning lights visible to indicate an issue.

Filed Mar 11, 2025 · Electrical, Engine · FL

While attempting to accelerate to get onto the expressway with no warning, the vehicle went into limp mode. Traction control, front end warning collision, auto/stop start functionality was all disabled and the engine light warning light on came on. The vehicle locked out and reduced acceleration. An attempt to pull over and turn the vehicle off for a few seconds was made. Once restarted, the vehicle continued running on limp mode at reduced speeds with the same indicators mentioned still disabled and locked out.

Filed Nov 29, 2022 · Brakes, Electrical · PA

The truck has 50,000 miles, purchased new. I don't tow or go off road. I take it to the dealer every 5,000 miles. While driving 65-70mph on the interstate (4-lanes), my dash lit up with five messages and the "Brake, Traction Control and Engine" lights illuminated. I applied brakes but the pedal went to the floor and the steering veered to the left causing me to move out of my lane. The truck then went to limp mode and I was unable to go above 43mph the remainder of the trip home. After taking it to my dealer the next day, I was told they "found air in the brake fluid system due to secondary seal failure in brake master cylinder, and was quoted a new cylinder (PN 86788482) for $1708.06. RESPONSE TO QUESTIONS: >Component failure: brake master cylinder (eBoost Brake Unit Assembly) / Brake System Failure >It was just me in the vehicle - brake failure on the highway put me and others on the road at major risk >Yes - After paying to diagnose, I was told this was brake master cylinder failure. ...GM issued a Customer Satisfaction Program (N202324120) for a limited number of MY2021 Silverado/Sierra trucks (mine is a MY2019) for dealers to replace the eBoost brake unit assemblies due to failure >Part has not been inspected by my insurance rep./I do not know if anyone else has inspected >The warnings illuminated on the dash at the time of brake failure while on the interstate 1. "Service ESC" 2. "Service Trailer Brake System" 3. "Steering Assist Is Reduced Drive with Care" 4. "Service Brake Assist" 5. "Brake System Failure 43 MPH Top Speed" 6. Also, the BRAKE, Traction Control and Engine lights illuminated

Filed Apr 12, 2022 · Transmission · 7,000 miles · CA

The contact owns a 2019 GMC Sierra 15000. The contact stated while driving approximately 5 MPH as the vehicle was placed into "drive" the transmission, would hesitate and would not shift into gear. The contact stated that when the "drive" engaged, the shift was very hard and shook the vehicle, which then lunged forward. The contact stated that the "check engine" warning light was illuminated. The contact had taken the vehicle to a local dealer, where it was diagnosed and determined that there was no transmission failure. The vehicle was not repaired. The contact stated that the transmission failure is recurring. The manufacturer had not been informed of the failure. The failure mileage was approximately 7,000.

Filed Feb 12, 2021 · Transmission · 56,000 miles · MS

2019 gmc sierra with 56k miles when accelerating transmission seems to get stuck in first gear makes idol sounds rpms jump up then hard shift into second, makes the truck jerk when it happens, since the issue started it happens every time I drive it. I took it to local gmc dealership on 2/9/21 manager said 'yes it's a known issue with gmc & that year model trucks' 2 days later called to see status of truck manger said his transmission guy found the issue and fixed it said computer and transmission not talking to each other did a 'transmission relearn' was covered under power train warranty. I had the truck back less than 24 hours and now back to having the same issues again! Clearly it's not fixed and concerning this is going to be a safety issue while driving! Gmc 'known' issue then issue a recall and fix it right the first time!

Filed Dec 10, 2018 · Brakes, Electrical · 5,000 miles · NY

Have about 6000 miles on my 2019 gmc seirra denali 5.3 . I've been experiencing a very troubling issue been to the dealership once already and had a hard time convincing them that something was wrong with the truck .every time I drive for long periods of time or idle for 10+ mins when I shift from park to drive I cannot go faster than 5 MPH without the rear brakes locking up. I do not know if this is some kind of limp mode or what .