Automatic Transmission Control Module problems of the 2010 Chevrolet Traverse

Door locks unlock/lock and then the car seems to go into neutral and the rpm goes to about 7,000. This has killed the engine twice. Gm has assigned a case number 8-423-8930914. Tcm, catalytic converter and neutral switch had been replaced and no change. Happens at various speeds - 75, 55,40,8mph and stopped. This has happened at least 30 times in the 34 days that we have owned it. It has been into the dealership four times.

June 2016, approx. 114,000 mi - felt a lurch in stop & go traffic; flashed "service stabilitrak," "service traction control," "backup alerts = off". The check engine light appeared. A few miles down the road when traffic sped up, I realized I only had one gear and could not accelerate above 60mph. A serious problem on the interstate! several hours later, the check engine light remained on, but the car drove normally -- straight to the repair shop, where it was deemed to need $2400 in transmission repair due to the following fault codes: p182e & c0561. They will replace the transmission mode shift sensor and the transmission control module. The mechanic also informed us that we will eventually need a $700 repair for the control arms in the rear suspension -- ge has corrected a known fault in the parts. All this is on top of a $3000 repair done in April 2015 at 92,500 mi. For known steering defects. In that case, as the Traverse warmed up, the power steering got hard to turn. Gm repaired part of the problem at no cost, replacing power steering pump and gear housing. Another mechanic completed the replacement of the rack and pinion assembly that was also part of the problem. These are both substantial defects and repairs needed in a vehicle that was expected to last much longer before needing more than routine maintenance.

Water pump replaced in March 2013, covered under warranty. Hvac actuator also replaced at this time. 2000 mile trip made after repair and upon return engine suffered catastrophic failure on April 2, 2013. Diagnosis catastrophic failure of the 3rd cylinder. Cause unknown. Occurred during morning commute on heavily trafficked highway. Children were in car when it stalled. Had to be pushed from center lane of traffic and then towed to dealer. One week after car returned from engine replacement, leak appeared in hvac. Leak repaired and car retrieved April 29, 2013. A week to the day of the car being repaired, service stabilitrak system light came on. Power steering seemed non existent and check engine light appeared. This problem required replacement of internal mode switch, reprogramming of electronic control module and transmission control module. Car retrieved may 7, 2013. Car returned but steering wheel still difficult to turn and squeaks when in use. Problem seems to worsen with increasing temperatures. Additionally, radio will not always shut off after driver door opened. Service stated they could not reproduce problem but happens frequently to driver. 4 serious service requirements in two months for a 2. 5 year old car with under 60k miles. Chevrolet certainly doesn't make a vehicle to last and this vehicle is certainly not a car to call safe or reliable.