2009 Chevrolet Silverado 2500 HD Questions

All 2009 Chevrolet Silverado 2500 HD Questions

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no code any help ihave had it to several dealers they say nothing wrong
The starter has already been replaced not sure what is causing it.
The first thing that happened was unintended acceleration, turned out to be the floor mat sticking under the accelerator. Then there is the turn signal switch will return after making a turn, however the blinker stays...
no codes,14,000miles,6.7miles per gallon when towing 9,000 pds.15.0 mpg not towing,3.73 gear ratio,4x4
GETTING ENGINE SURGE IN TOW MODE WHILE SLOWING DOWN TO A STOP. IS THIS NORMAL?
I GET A ENGINE SURGE WHEN SLOWING DOWN IN TOW MODE. IT GOES FROM 1500RPM TO 2500 TO 3000 RPMS. FOOT IS OFF THE GAS PEDAL, JUST SLOWING DOWN TO A STOP. IS THIS NORMAL