2012 Silverado 2500HD Duramax 4X4 LTZ. Intermittent electrical issues

[Jon T]

Experiencing intermittent electrical issues.  From all normal driving to dash gauges quitting, door locks jumping up/down repeatedly, info warnings to Service Traction Control, Service Trailer Brake System, Service Stabilitrac System, dash chimes, hard transmission shift, momentary engine stalling out … have had truck in to dealer repeatedly to investigate.  Last time in the dealer replaced the Transmission Control Module.  This lasted about 8 months of casual driving, no trailering.  I have asked dealer to check and/or replace the negative battery cables, this seems like a “grounding” issue to me.  Truck has 100,012 miles.  At 82,000 it had the dreaded High Pressure Fuel a pump disintegrate and replaced all the fuel lines, pump, injectors, etc. associated with the pump failure.  All service work and all repairs have been done by the selling dealer.  I do not have any issues with the dealer, they have been great to work with and understanding my problem with the truck.  I am wondering if others with similar issues have found a common correction to this “intermittent” problem.  Thanks for any suggestions.

[Jsdirt]

You've got a bad connection, wire, or a dying module. You need someone that specialized in electrical troubleshooting and driveability issues. A GM dealer is NOT the place to go for this.

 

Like I say all the time, there are some very competent technicians employed at GM dealers all over the country. It's corporate that stifles their ability in the way that they pay. Nobody wants to work for free, so you can't expect much at a dealership.