NHTSA Complaint #11646624 — 2021 CHEVROLET TAHOE

Approximately 4/14/24 while I was driving home from being out of town with my child the check engine light came on with a message “Reduced acceleration drive with care.” The car was not shifting and I couldn’t go over 45 mph and the rpm’s were about 3000 at that speed. The light went off and the car seemed to be driving normally. While on the interstate traveling at approximately 70 mph the car did a hard shift and drastically slowed while the rpm’s spiked. I took it to the dealership who determined the valve body needed to be replaced. Approximately August 2024 it happened again but the light went off. December 2024 same issues with the check engine light, reduced acceleration and not shifting happened. Took the car back 12/9/24 where a wire was replaced. Picked the car up 12/12/24 and 12/18/24 while driving in the car rider line picking my child up the car had a hard shift, check engine light came on, reduced acceleration message and the car would not shift. Notified the dealership immediately and took it back 12/26/24 where they did a second valve body replacement. 1/28/25 on my way home from running errands and was stopped at a red light and the car shifted hard, check engine light came on, reduced acceleration message and engine would not shift causing me to drive slowly to get home (40 mph or less). Dealership was notified immediately and took in the following day. Dealership had a week and had me pick it up because they “couldn’t replicate the issue.” 2/15/25 after driving 2 hours we pulled in a parking lot and the car shifted hard hard, check engine light came on, reduced acceleration and would not go into reverse. The dealership picked the car up and have had it since trying to replicate it. It occurs without warning while driving and will drastically slows the car down putting us a risk of being rear ended due to the rapid and speed change. It also is a safety risk due to lack of warning that a power failure is about to occur while driving.