Recurring electronic transmission shift control failure on a 2023 Chevrolet Bolt EV. The Electronic Transmission Shift Control Pushbutton Circuit Board (GM part designation K212) has failed twice within approximately 9,300 miles. First failure occurred at approximately 45,695 miles in July 2025. The dashboard displayed a malfunction indicator and a "Service Transmission" warning. Diagnostic trouble code U18D2 was set: Lost Communication with Transmission Range Selector Control Module on the Powertrain Sensor CAN Bus. The selling Chevrolet dealer replaced the K212 pushbutton circuit board and reprogrammed the HPCM2 module. Second failure occurred at approximately 54,969 miles in March 2026, only about 9,300 miles after the first repair. Same diagnostic code family, including the identical U18D2 code, plus U0076, U18C6, and U240E. The same dealer replaced the same K212 pushbutton circuit board a second time. The repair was processed under manufacturer warranty. Safety risk: when the failure occurs, communication with the transmission range selector is lost intermittently and without warning, leaving the vehicle unable to be reliably shifted into Drive, Reverse, or Park. This creates a clear hazard in traffic, parking lots, and on inclines. The failure mode is sudden and the warning lamps appear only after the malfunction has begun. The component is located beneath the center cup holder area. There is no visible waterproofing or moisture isolation around the circuit board, despite its location directly under a known liquid exposure zone. The failed component from the second repair was reportedly shipped back to GM by the dealer. The vehicle is available for inspection. The failure has been confirmed twice by an authorized Chevrolet dealer.

Source: NHTSA complaint ODI #11736684 · view all complaints for this vehicle at nhtsa.gov

The vehicle suffers from severe, unresolvable electrical failures causing recurring loss of propulsion, shifting lockouts ("No Driving Conditions" / stuck in Park), complete exterior lighting failures, and loss of communication with the Restraints Control Module (RCM) and airbag impact sensors. The primary failure involves short circuits, open circuits, poor terminal contact, and thermal damage with melted, charred wiring and exposed copper in the main harness[cite: 6]. On May 25, 2026, OnStar telematics issued a critical red alert for the Regenerative Braking System[cite: 7]. All damaged components and diagnostic reports are available for inspection upon request[cite: 6, 7]. Safety risks include sudden loss of propulsion at highway speeds, total headlight and tail light loss during night driving, and potential non-deployment or malfunction of airbag restraint systems during a collision. The issues have been repeatedly reproduced and confirmed by an authorized dealership through 7 repair attempts between Sept 2024 and Apr 2025. Diagnostic steps included opening GM TAC Case 9-13634782861, consulting GM engineers, and testing 33 ground points. On Oct 28, 2024, the dealer and an insurance adjuster officially confirmed the failures are covered under GM warranty and unrelated to any accident[cite: 8]. Symptoms first appeared on Sept 10, 2024 (at 5,144 miles) with a "Waiting initialization to shift" message, blown Fuse 58, and loss of power to the ECM. Warning signs prior to subsequent failures included "Service Trans" warnings, "Reduced Propulsion" alerts, dim headlights, Check Engine Lights, SRS/Airbag warning lights, and total shifting lockouts after hitting road bumps. Despite replacing Fuse 58 (multiple times), Fuse 64, IP Fuse 7, the underhood fuse block, ECM connector terminals, headlamp assemblies, the RCM module, and multiple airbag impact sensors, the underlying electrical instability remains unresolved.

Source: NHTSA complaint ODI #11754113 · view all complaints for this vehicle at nhtsa.gov

2023 Chevy bolt has a hand 'regenerative brake'. I was using it while driving in traffic. My speed was around 40 mph when the car in front of me abruptly stopped. The distance between us was approximately 30 ft. I immediately switched from hand brake to foot brake and the pedal felt soft and there was a delay in response to foot brake. I rear ended the vehicle in front of me causing damages to both vehicles. This had happened in August 2023. I called the manufacture to let them know what happened and they told that they will pass the information. I made a call to them in December of 2023. My vehicle was not inspected for this issue as I am not sure who can help me with this problem. There were no warning lights before the accident. Ever since the accident I have tested switching from 'hand brake' to foot brake and always feel a softer pedal and a slight delay in response. I believe this issue was a main factor for the accident as in my over 10 years of driving experience I have never had an accident before. I believe that the 'hand brake' is using electric motor while foot brake uses regular hydraulic system and they are not adjusted properly when are switched in between.

Source: NHTSA complaint ODI #11574601 · view all complaints for this vehicle at nhtsa.gov

known issue with " anti click washer on Bolt EV " and resulting damage to related components can cause loss of control acceleration, stopping and major damage and cost, no warning lights or TSB other than for previous gen but same design and same defect, inspected by dealer shows broken anti click washer and damage to other components https://gmauthority.com/blog/2022/07/heres-why-your-chevy-bolt-ev-may-have-a-clicking-sound/

Source: NHTSA complaint ODI #11757018 · view all complaints for this vehicle at nhtsa.gov

Both front wheel drive shaft anti-click washers on my 2023 Bolt EV fractured at 18,269 miles. The failure caused a repeatable click/clunk from the front of the vehicle on torque application — accelerating from a full stop, from a slow roll under 5 mph, or accelerating out of a coast at about 20 mph. A Chevrolet dealer confirmed both anti-click washers were cracked (Repair Order 652900). The repair required removing both front half-shafts, replacing the washers (GM P/N 42754282) and drive shaft nuts (GM P/N 13208079), and reinstalling the axles. The noise was eliminated. This is a safety issue because GM has documented in writing that this exact failure can damage the ABS wheel speed sensor, which sits directly in-line with the washer on the outboard joint of the half shaft. GM TSB 22-NA-089 (Bolt EV) and TSB 19-NA-103 (Volt) both state the fractured washer causes "possible collateral damage to the ABS wheel speed sensor," that ABS, Traction Control, and StabiliTrak lamps may illuminate intermittently, and that those systems "may be deactivated/shut off for that ignition cycle," setting DTCs P215B and C0035-C0051. Loss of anti-lock braking and stability control is a direct safety hazard. My core concern is scope. GM acknowledged this defect in 2019 (Volt, MY2016-2019) and 2022 (Bolt EV, MY2017-2019), but capped the bulletins at model years that exclude my vehicle. My 2023 Bolt EV suffered the identical failure of the identical part, fixed by GM's identical specified procedure and part numbers. Other owners report the same failure on 2020, 2022, and 2023 Bolts. I was charged $737.34 as customer-pay. The dealer submitted a warranty claim and GM rejected it, stating a BEV has no applicable powertrain coverage for this component. I request NHTSA review whether this defect extends to later model year Bolt EV/EUV vehicles and whether a recall is warranted.

Source: NHTSA complaint ODI #11764442 · view all complaints for this vehicle at nhtsa.gov