2022 Chevrolet Silverado 1500

VEHICLE: 2022 Chevrolet Silverado 1500, VIN [XXX] DEFECT: Transmission suddenly, violently downshifts from a high gear to a much lower gear with no driver input, at highway speed. Causes RPM spike, violent jerking, Check Engine Light, loss of vehicle control. Occurred 5 times. Not fixed despite 4 dealer repairs, 61 days out of service. 5/12/26 - 1st failure, 70+ mph on I-5, stuck in low gear. 5/14-6/8/26 - Repair 1, Bud Clary Chevrolet: valve body solenoid replaced. 6/13/26 - 2nd failure days later, Hwy 12 (no cell service), spouse + [XXX] infant in vehicle, forced to keep driving to reach safety. 6/13-6/17/26 - Repair 2, Harvest Chevrolet: same fault codes; valve body connector found loose. 6/17/26 - 3rd failure, same day picked up, same [XXX] location. 6/19-6/26/26 - Repair 3, [XXX] Chevrolet Diagnosed by TSB#25-NA-301: wiring found chafed/pinched. Dealer's own paperwork says cause of fault codes could not be determined. I requested full internal transmission inspection; declined. 6/26/26 - 4th failure, same day picked up, ~100 mi later, [XXX] [XXX], family in vehicle. Dealer denied promised tow after 4-hr wait; transport arranged. 7/1-7/17/26 - Repair 4, [XXX]: GM's national Technical Assistance Center directed wiring circuit replacement (GMTAC Case #XXX). Again requested internal inspection; again declined. Service tech said GM engineering was dictating repairs and I'd "just need to drive it until it fails again." 7/20/26 - 5TH FAILURE: XXX near mile marker 24 (Kalama/Woodland, WA), ~75 mph, [XXX] in vehicle. Uncommanded downshift nearly forced my truck into an adjacent semi-truck. Same day picked up from Repair 4. SUMMARY: Code P0776 present at every repair; P0716/P0717 recur. 4 fixes attempted, none resolved it. Internal inspection requested twice, denied twice. Near-collisions XXX and XXX. Infant in vehicle for 2 incidents. 2nd owner; active GM powertrain warranty through XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vehicle experiences a sudden, violent drop into "limp mode" during active traffic acceleration. The internal Output Shaft Speed Sensor completely drops its signal, causing the vehicle to rapidly lose speed in active traffic lanes, creating an immediate and severe rear-end collision hazard.Diagnostic Evidence:Dealership (Crews Chevrolet) officially scanned the vehicle and documented history codes DTC P0722 (Output Shaft Speed Sensor Circuit No Signal) and DTC P0700. The dealership technician verified that the external wiring harness is fully intact, isolating the failure strictly to the internal transmission sensor.Manufacturer Actions:General Motors Corporate (Case thread::oxEmaLlrKKms4NDj0d9wJ0w::) is actively refusing to authorize the dealership to drop the transmission pan to replace this failing component under the active Bumper-to-Bumper Warranty. They are citing the "intermittent" nature of the safety hazard as a reason to deny diagnostics, forcing me to either operate an unsafe vehicle or leave it parked.

The internal transmission Output Shaft Speed Sensor (OSS) and its associated internal circuit/lead frame assembly failed. The vehicle is fully intact, operational, and available for inspection upon request. When the Output Shaft Speed Sensor intermittently loses its signal (dropping to 0 RPM while the vehicle is stopped at red lights or in traffic), it forces the vehicle into an immediate electronic "limp mode." Upon pressing the gas pedal to accelerate, the transmission violently slams into gear with massive mechanical force. This sudden, unpredictable jerking and hesitation while accelerating into active traffic creates an immediate risk of being rear-ended, losing traction, or losing control of the heavy vehicle in an intersection. The problem was officially confirmed via a diagnostic computer scan by an authorized GM dealership (Crews Chevrolet), which pulled and documented history codes P0722 (Output Shaft Speed Sensor Circuit No Signal) and P0700 (Transmission Control System Malfunction Warning). However, the dealership declined physical teardown or sensor replacement because the electronic failure is intermittent and could not be replicated during a brief technician test drive. Yes. The vehicle's external wiring harness was physically inspected by an authorized General Motors dealership technician, who confirmed the external wiring passed inspection. This officially isolates the intermittent electrical drop to an internal transmission component failure. It has not been inspected by police or insurance. Yes. The symptoms appeared suddenly without prior warning. The transmission began shifting erratically and violently, immediately followed by the illumination of the dashboard Check Engine Light (Malfunction Indicator Lamp). The onboard computer triggered diagnostic trouble codes P0722 and P0700.

An internal transmission Output Shaft Speed Sensor (OSS) failure causes the vehicle to enter "limp mode" and shift violently, creating a risk of rear-end collisions or loss of control, according to the report. A GM dealer confirmed diagnostic codes P0722 and P0700, isolating the issue to an internal component after an inspection of the external wiring harness.

Truck continues to shutter after having the torque converter replaced and the 2nd injector replaced. Been in the shop several times over the last few years, and still giving warnings on the dash saying, reduce acceleration drive safely. Feel like we just got a terrible vehicle. Almost paid off, and it’s just unreliable. Sadly we need this truck every single day, and the local dealerships have now pushed the problem out so far that we’re passed out 60k warranty period.

Truck stutters and idles terrible. Vehicle warning light keeps saying, reduce acceleration and drive safely. Two years ago an injector went bad, and it was fixed. 6 months ago, we had it in the shop, of course still under the 60k mile warranty. Said it was fixed, it wasn’t. Just had it back there, and they replaced the the torque converter. Shaking stopped for a month. Now it is even worse. Believe it is faulty injectors. Sadly, we’re not passed the 60k warranty period and feel unsafe driving our truck which we need every single day. Truck is nearly paid off and feel like we got jipped as this truck continues to have problems after problems

1)The truck experiences an intermittent but complete failure of the Crankshaft Position (CKP) Sensor circuit and multiple chaffing points of the vehicle wiring harness. This issue is a documented manufacturing and electrical defect covered under General Motors Technical Service Bulletin (TSB) #24-NA-012. Yes, the truck is available for inspection. 2)This issue has happened to me on five occasions where I was traveling over 50 MPH and the vehicle violently jerked with my wife and children in the truck with me. This defect poses an immediate, severe safety hazard due to unpredictable, sudden engine/transmission jerk while operating at highway speeds. My main priority is my family! This failure compromises my ability to safely maneuver, accelerate, or steer the heavy-duty vehicle out of active lanes of traffic, dramatically increasing the risk of a high-speed rear-end collision or crash. 3) The problem has been reproduced by Rick Hendrick Chevrolet Norfolk and R.K. Chevrolet Virginia Beach. There are service invoices confirming these reproducible jerks and subsequent engine codes thrown. 4) No, I brought this up to General Motors as a safety issue but they have brushed off my concerns. 5) The second time I had the violent jerk I had a message appear on my DTC that stated "174 mi Until 65 MPH Max Speed and Service Emission System See Owner's Manual" that was on 2/21/2026. Extra Note: The vehicle sat disabled at a dealership service center for 21 cumulative days during the initial attempt to repair this specific defect under TSB #24-NA-012. Merely 58 days after the repair, the identical crankshaft position sensor circuit/wiring failure reoccurred while driving, resulting in secondary engine failure and requiring a visit to an independent service facility for diagnostic verification and wiring replacement. Internal vehicle history confirms that prior to my truck ownership the crankshaft position sensor was replaced in December 2025 weeks before I purchased the truck.

On June 7th, 2026, I pulled into my driveway, and put the truck in park (did not set the parking brake, but left it running). I walked, approximately 25 feet up my driveway, towards my garage, to retrieve my garbage can, to bring it to the road. About the time i got to my garbage can, my truck proceded to roll towards me, as i walked back towards the road. I then noticed it rolling, let go of my garbage can, ran to the truck, jumped in it, hit the brakes, and i had to shift the truck back in gear, then back in park. By that time, it had already struck the support pole to my temporary car port, destroyed it, and caused a small amount of damage to the front fender of my truck (small dent, and some scratches in the front plastic). I know i did not leave it in drive, as i had to shift it into gear, then back into park, as well as the fact, that it stayed still, as i walked normally, 25 feet up the driveway. I tested the truck, after the fact. It starts rolling immediately after taking your foot off the brake, from the same spot. On a side note, my truck had just received an update download, 2 days prior to the incident. There were no warning lights. Luckily, my safety, was the only one at risk. I have not had it inspected, and it has not happened again, since. I did contact General Motors, immediately, but got no response to my email. I do have a short security video, starting when i retrieved my garbage can, to the moment the truck struck the pole.