2023 Chevrolet Silverado 2500 Engine Problems

The contact owns a 2023 Chevrolet Silverado 2500. The contact stated that while driving at various speeds, the transmission was slipping. Additionally, the contact stated that while driving 60-70 MPH, the vehicle stalled. No warning light was illuminated. The contact pulled over to the side of the road. Upon inspection, the contact became aware of a coolant leak underneath the vehicle. The vehicle was towed to the dealer, where it was diagnosed that the turbo coolant inlet had fractured. The part was replaced. Additionally, the dealer determined that the transmission was in working order upon inspection; however, the failure persisted. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 83,000.

NHTSA ID

11753138

Incident

Jul 13, 2026

Mileage

83,000 mi

Truck will not release the key consistently upon shutting down the truck. The interlock will not allow it to turn fully off and pull out despite being placed in park.

NHTSA ID

11736161

Incident

May 6, 2026

GM should be ashamed of themselves not covering the shift to park issue that they have created. This is a known issue and should be recalled. It is impacting thousands of consumers.

NHTSA ID

11724985

Incident

Mar 17, 2026

I was on a two lane driving down the road and getting up to speed. I was still about 45 miles per hour on my way up to 55 mph my vehicle started de rating very fast as I’m driving and then my engine shut off. I had no control over my steering as I made a turn to get off the two-lane road because there was no shoulder. I had to turn the steering wheel really hard and was not able to control the vehicle at all because the engine shut down completely. Everything shut down. I was sticking out in the road. I have no clue yet. What caused it I had to get it towed to a dealership. I just thank God I wasn’t on an interstate but still I was on a two lane and had just topped over a small hill where nobody could see me when they topped the little hill. It could’ve been a very dangerous situation.

NHTSA ID

11674155

Incident

Jul 16, 2025

Component/System: The Allison 10‑speed (10L1000) transmission valve body catastrophically failed on [XXX], while driving Sunday afternoon down Galveston Seawall Blvd. The truck abruptly dropped from 45 mph into limp mode in heavy traffic, forcing me to pull into the bike lane to avoid being rear‑ended. The vehicle remains at Classic Chevrolet (Galveston, TX) awaiting the OEM valve body—which is on national backorder—and the complete transmission assembly is likewise unavailable. The failed valve body and transmission are available for inspection upon request. Safety Risk: Unexpected limp mode and gear lock‑up in heavy traffic create an immediate risk of rear‑end collisions or side impacts as surrounding drivers have no warning of sudden deceleration or loss of drive. Reproduction/Confirmation: Classic Chevrolet diagnosed and confirmed the failed valve body on May 12, 2025. Their service advisor and my assigned GM Case Agent (#[XXX]) have both acknowledged the defect but report no parts available for repair. Inspections: The vehicle has been inspected by Classic Chevrolet under warranty. GM Customer Care has reviewed my service orders and correspondence. No police or insurance inspections occurred, as no collision ensued—however, the roadside inspection at Classic Chevrolet confirmed the mechanical failure. Warnings/Symptoms: There were no prior warning lamps, messages, or symptoms before the failure. The valve body failure occurred without any advance indication. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11671056

Incident

May 11, 2025

The contact owns a 2023 Chevrolet Silverado 2500. The contact stated that upon starting the vehicle, the check engine warning light illuminated. The contact restarted the vehicle, but the light failed to turn off. While driving 45 MPH hauling a trailer, the vehicle failed to operate as needed and the transmission was making an abnormal clunking sound. The vehicle then went into SAFE Mode and failed to exceed 35 MPH. The contact stated that the failure was related to NHTSA Campaign Number: 24V797000 (Power Train). The vehicle was taken to the local dealer, where it was diagnosed and determined that the valve body needed to be replaced. The vehicle was not repaired. The manufacturer was contacted and opened a claim for the contact. The failure mileage was approximately 29,000.

NHTSA ID

11625011

Incident

Oct 9, 2024

Mileage

29,000 mi

Vehicle was towing Horse Trailer. Gave an indication message to check trailer break wiring. I did so and all was working fine. I loaded my horses and pulled out onto the road. Traveling 10 mph the truck completely shut off, no brakes, No warning, I helplessly rolled to a stop. The truck then turned on electrically, but did not start the engine completely by itself. Two minutes later, the truck turned itself off electrically. The motor was never running. I had it towed to a dealership in which it took them five days to repair. The truck has 17,000 miles on it. If I would’ve been traveling on the expressway or going any faster, I could’ve killed people.. I personally have PTSD from ever driving this truck hooked to a trailer again. There should have been some kind of warning system. I should have never lost my brakes. I purchased this truck as a towing vehicle from my Horse Trailer And now I am terrified to use it!

NHTSA ID

11591954

Incident

May 26, 2024

Engine oil leaking from the lower engine oil cooler line from the radiator. Oil leaked from a small crack under the fitting.

NHTSA ID

11515084

Incident

Mar 20, 2023