I have a 2004 Tahoe and it will not back up a 25% grade unless I put it in 4 low. I have the stabilitrac model, you can put the pedal to the floor and its like there is no power. just sits there like it has a stall convertor almost. My Brother had a Dodge Durango that did the same thing on the same hill (his Driveway) Any ideas??There was a trailer hooked to me, empty, weighs maybe 700 lbs, no surge brakes, no brakes at all on trailer. Was plugged into my lights, 4 way with an adapter. Once I put it in 4WD, shot right up the hill, no problem. im stumped.
Thanks
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