Automatic Transmission Control Module Problems of Chevrolet Suburban

Transmission malfunction. This has appeared several times at highway speeds and low speeds. We have dad to limp along in the slow lane to exit ramp and take back roads to the nearest dealership. The current problem has been confirmed with error codes p0747. The dealership has scanned this vehicle and detected error codes in the past on two different occasions and found p176c in tcm on 08/01/23 and p17d6 on 10/24/24. Check engine light comes on with a screen prompt “reduced acceleration drive with care”. The transmission valve body has already been addressed once because of triggering limp mode.

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The contact owns a 2015 Chevrolet Suburban. The contact stated that while driving on two occasions, the vehicle did not accelerate as intended. The contact stated that when the vehicle reached 55 mph, the vehicle dead stopped, and she was thrust forward, and on the second occasion, she sustained a head injury from hitting her head on the steering wheel. Medical attention was not needed. Additionally, on the second occasion, the vehicle began overheating, and the check engine warning light illuminated. The vehicle was towed to an independent mechanic, where it was codes p0700, p0741, and p0796 populated, and the tcm, torque converter clutch circuit, pressure control solenoid c, and transmission needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was unknown.

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My gauges are doing all types of crazy things blinking on and off I replace my pcm and body control module and still having problems this GMC is not drive able and it should be a recall I have spent over $2000 in the shop.

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2003 Chevrolet Suburban with traction control. Control cuts in when making sharp turn from side road onto main highway. This causes vehicle to rapidly slow to almost a stop until transmission catches up and vehicle speed increases. Dealer says it is because of sensors in wheelbearing and the wheelbearings need to be replaced. This is a definite hazard when entering a high speed (55 mph or higher) highway from a side road. I complained to gm and they said there were no recalls about this. Dealer says they have had problem on several vehicles.

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: the contact stated while driving at speeds between 5 and 45 mph the vehicle stalled on 6 occasions. The vehicle would not restart and had to be towed to the dealer each time. This problem started in August 2005. On 5 occasions the dealer could not duplicate the problem however; adjustments were made to the vehicle. On the sixth occasion the dealer replaced the pcm module.

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Check engine light illuminated after 300 miles travel. Hard shift from first to second (felt like transmission dropped from vehicle. This first occurred six months after purchase of 2003 Chevrolet Suburban (new). Dealer re-programmed transmission control module. Same problem on return trip four days later, and six more times in the past 2 1/2 years. Four separate gm dealers, in two states, have attempted fix via: 1. Re-program tcm, 2. Replace transmission solenoid, 3. Replace transmission valve body and re-program tcm. Still not fixed.