Three problems related to power train have been reported for the 2012 Chevrolet Silverado 2500. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Chevrolet Silverado 2500 based on all problems reported for the 2012 Silverado 2500.
Transmisión control module stopped working while driving on the highway. It went from going 70 miles per hour on the highway to 15 miles per hour. Very scary and dangerous.
The transmission control module failed causing the vehicle to loose power and operate only in "limp mode". General motors does not have a replacement module available, leaving the vehicle inoperable. Gm has no reliable information as to when a module will be available. I had to use a third party service to try and repair the module for a cost of over $1,200. This seems to be a common problem with the 2008-20015 gm duramax with the allison transmission.
Several problems. . Multiple failures of "glow plugs" (known gm problem) and nox exhaust sensors, high def use, unusual "buildup" in the exhaust filter requiring many dealer visits, downtime, repair costs and extremely poor fuel mileage. Glow plugs often fail at initial start when system is "cold". . Oat has been from about 45 to about 90 degrees fahrenheit. Altitude, about 20 to 1200 ft asl. Dealer serviced only. Vehicle has no mods!!!!.