2018 Chevrolet Tahoe transmission problems

Filed Aug 28, 2026 · Engine, Transmission · GA

05/15/23 - AFM Lifter failure - Complete Top End Rebuild under extended warranty purchased when i bought the Tahoe - Preowned certified. Cost $2,000.00 Out Of Pocket ( Days Chevrolet Repaired 86,350 miles) 09/06/23 - Transmission failed - Warranty paid except $2,000.00 (94,000 Miles) 02/02/26 - Broken Driver Side Motor Mount Replaced $350.00 (159,000 Miles) 02/28/26 - Rear end Failure 03/20/26 - AFM Lifter Failure Again - Been in the shop since then. No warranty/ Pay out of Pocket (160,010 Miles)

Filed Jul 27, 2026 · Engine, Transmission · AK

Out of nowhere without any warning light all of a sudden couldn’t back up when geared into reverse to reverse. Turned the vehicle off and back on, then was able to reverse. Left parking lot and was on the road and vehicle started loosing speed, then put into park with hazard lights. When attempting to get off the road for safety reasons tried putting into drive and the car then drove in reverse. Local Fire department came and called in the local police dept for assistance and pushed vehicle off to the side and tow company came and took to the auto shop with information today of the transmission going out, and with that causing happening causing the Fluid to Smell Burnt and Full. The auto shop test Drove and made It 30 Feet and Would Not Move. Transmission Is Failing and Causing the Concern.

Filed Jul 2, 2026 · Acceleration, Transmission · NJ · crash

Unexpected acceleration

Filed Jun 9, 2026 · Transmission · FL

Transmission failure at 127,000 miles. Multiple flairs in transmission resulting in total rebuild

Filed Mar 12, 2026 · Engine, Transmission · WA

Transmission failed at 94,000 miles Misfire 80,000miles AFM/DOD issues $10,000 in repair bills still not fixed

Filed Feb 16, 2026 · Engine, Transmission · TX

Unknown, vehicle starts to jerk when shifting gears. Jerks when breaking and when accelerating. Check engine light on. I see there is a prior recall for the same issue on same year as mine

Filed Jul 2, 2025 · Transmission · IN

Transmission failure at 110,000 miles. No warning lights, no codes. The transmission was slipping during acceleration, random rpm bouncing at a steady speed, acting lost in gears, slow power up hills then takes off. Currently sitting at a chevy dealership.

Filed Apr 30, 2025 · Transmission · 80,000 miles · GA

The contact owns a 2018 Chevrolet Tahoe. The contact stated that while driving at an undisclosed speed, the vehicle began to shake excessively, prompting the contact to discontinue driving the vehicle. The check engine warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the transmission. The vehicle was repaired, but the failure reoccurred. The manufacturer was not notified of the failure. The failure mileage was 80,000. The VIN was not available.

Filed Apr 5, 2025 · Transmission · WI

Transmission is overheating and forcing the truck into limp mode

Filed Jan 18, 2025 · Engine, Suspension · CO

4100 Miles - Asked service dept. at dealership to check for noise coming from underside of vehicle. No service was completed. 4800 Miles - Asked service dept. at dealership to check again for noise on suspension. Service indicated it was a parking brake cable that was rubbing. 9800 Miles - Asked service dept. at dealership to check fluttering noise coming from engine. No service was completed. 15,000 Miles - Asked service dept. at dealership to check again for rattling noise coming from engine. Service indicated fluttering heard was exhaust pulsing through the manifold. No service was completed. 21,000 Miles- Service Dept at dealership provided multi point inspection and given clear inspection. No service was completed even though I stated there was still engine noises. 24,000- Asked service dept. at dealership to check hard shifting from transmission and poor performance. In addition, mentioned the noises again. No service was completed, service stated it was due to colder temperatures. 25,000- Asked service dept. at dealership to check hard shifting from transmission and poor performance. In addition, mentioned the noises again. Engine cooler lines were replaced. Scanned and verified clutch learn values all normal. Activated TCC and disabled TCC and found normal operation. No service completed. Now, after warranty has expired, service at dealership is telling me my camshaft and lifters need to be replaced, struts are leaking, transmission needs attention and should be flushed, and that I should NOT be driving my vehicle due to safety concerns. Although, I had taken the vehicle in multiple times during warranty period with complaints about these very items, no service was ever completed to correct them. Since then, I have read multiple articles documenting GM issues with L87 6.2L engines and transmissions. I'm filing a formal complaint with GM, as these issues should have been communicated to consumers or fixed through recalls.