6.9

fairly significant
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
9,000 miles

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problem #1

Mar 072015

Sierra 3500

  • 9,000 miles
1st incident veh didn't switch from 4 to 2wd, stop veh, work switch, went to 2wd. Same time driver seat went full forward, seat back full forward, brake pedal full towards driver. Able to readjust, onstar said various electrical - believe modules- problem. Was able to drive, took to dealer, unable to replicate. Few months later adjusted gain on electric trailer brake control - while in motion. Same proplem, seat and seat back full forward, brake pedal full towards driver. Luckily I knew what was happening and wasn't startled. 4WD control @ gain control above each other, left side of dash. No other trbl with veh. A 2015 GMC 3500 crew cab 4WD diesel long box, numerous options including heated-cooled leathe power seats & power adjust pedals. Both pedals moved together towards me. Mileage 1st time, less than 10,000 2nd time less than 13,000.

- Marine Cityy, MI, USA

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