2023 GMC Sierra 1500: hesitation when accelerating

Filed Jul 25, 2026 · Transmission · WI

While towing my trailer the vehicle intermittently slams gears and will hesitate the back tires momentarily to the point of screeching. This has led to close calls being nearly rear ended and having to pull over. This started out as a hard slam while trailering on the highway and has progressively gotten worse. Had into dealership twice to multiple times to try and figure out the issue but it’s not throwing any codes and they can’t get it to duplicate the issues. Nothing can be replaced due to no codes even though they think the valve body is going bad. Leaving the vehicle as a ticking time bomb for failure which could result potentially in a catastrophic incident. Only had the vehicle for one year now has 37k miles on it and have had the ecm, full wiring harness, and multiple sensors replaced already for a different problem early this year that had the truck in the shop for a month.

Filed Jul 10, 2026 · Engine · 17,000 miles · CT

The contact owns a 2023 GMC Sierra 1500. The contact stated that while operating the vehicle, there was an engine knock at start-up, and the engine intermittently hesitated and skipped. The vehicle was taken to the local dealer, who performed a PICO test on the engine, and the engine passed. Later, while hauling a trailer, there was a rattling sound coming from the engine. The vehicle was taken back to the dealer, who diagnosed the vehicle and determined that the engine needed to be replaced. The engine, radiator, and oil cooler were replaced, and the vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 17,000.

Filed Jun 9, 2026 · Transmission · NH

the vehicle is actively presenting severe mechanical symptoms that make it entirely unsafe to operate on public roads. Specifically, it exhibits a violent shuddering and vibration through the cabin when coasting or cruising at highway speeds. Furthermore, it undergoes aggressive jerking, harsh engagement, and dangerous hesitation the moment I press the gas pedal to accelerate or merge.

Filed May 9, 2025 · Engine · 41,000 miles · OK

The contact owns a 2023 GMC Sierra 1500. The contact received notification of the federal safety agency Campaign Number: 25V274000 (Engine and Engine Cooling); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while driving at speeds of 70-75 MPH or faster, the vehicle failed to accelerate or downshift without warning. The RPM increased; however, the vehicle failed to accelerate. The vehicle hesitated and jerked while changing gear. The dealer was contacted and diagnosed that there was metal in the oil which could cause engine failure. The dealer had performed several firmware updates; however, the failure persisted. The manufacturer was made aware of the failure and opened a case. The failure mileage was 41,000. VIN tool confirms parts not available.

Filed Apr 24, 2025 · Engine · TX

We were driving to dinner on March 28, 2025, when our 2023 GMC Sierra truck with just over 22,000 miles started making a clanking sound with major hesitation while trying to accelerate. At highway speeds, the truck lost nearly all power. We made it to the dealership, which was closer than home. Upon pulling in the parking lot, the truck died and we were unable to start it. The truck was actively losing power on the freeway and hesitating, we were fearful it would die on the freeway in 6 pm traffic. On March 29, 2025, we spoke with a service manager who said it sounded like the motor was blown. On April 2nd, Autonation GMC Corpus Christi South confirmed the oil pan was full of metal shavings and they were ordering a new motor. Upon asking for an estimation of how long we would be without our vehicle, the service advisor said he wasn’t taking it out of the bay and we should have it back by April 15. The check engine light did not come on until 1/4 mile from exiting the highway. On April 12, 2025, we texted the service advisor to make sure the truck would be ready on April 15, 2025. He responded that the motor still hadn’t come in and he would let us know when it did. On April 17, 2025, I escalated his from the service advisor to the service manager for Autonation. I was informed the motor had not been ordered, but he would order it and have the motor broken down to meet GM’s requirement. April 24, 2025, motor has been ordered, but no ETA or location of the motor.

Filed Aug 13, 2023 · Electrical, Visibility · AR

--Unwanted Reduction in The Front HVAC Blower Speed and Loss of Radio, Auto AC not working as designed --driver seat vibrating as the lane departure warning activated; I had turned the seat vibrate function off on 25 June 2023. I then went into settings to turn the function off again, and the system would not allow to make the change, it stayed in vibrate function --the passenger front window will not go up automatically, had to hold the button to make the window go up all the way. I then had a message in the DIC, that said, “Open and close passenger door”. I did so, at the next stop, but the message stayed on the DIC and the window still would not go up automatically with the button -- when the vehicle is operated and the AC is NOT on, just the fan, and windows down, and the auto temp set at 68 degrees, when at idle, there is an obvious increase in very hot air coming from the vents and stays that way until the vehicle is back in motion. Then it seems to adjust back toward normal outside air. During all this operation the recirculation is open to outside air --auto rain sensing windshield wipers; stops at full arc and hesitates during operation --driver side review mirror does not go back to preset 1 position, when put in reverse, both mirrors tilt lower, as I have set, but when put back into drive, the driver mirror does not fully recover until I push the 1 setting --DIC message of key not in vehicle, even when the key is in vehicle and vehicle is in motion, the DIC message stays on screen saying key not in vehicle --with AC in ON position, cold air stops and very warm/hot air starts coming out for about 30-60 seconds, then cold air starts coming out again, happens during driving and stopped, at any speed --Truck WIFI does not connect automatically SOFTWARE NOT UPDATED FROM GM- OTHER SAFETY ITEMS ARE AFFECTED --Auto headlights --Auto brakes --Auto wipers --Auto systems not working as designed