Tow/haul not engaging

Asked by GuruF5WN4 Apr 15, 2020 at 09:26 PM

Question type: Maintenance & Repair

I have a 2010 gmc Sierra sle 4x4
crew cab. I lent it to my stepdad to
tow his drag car and it worked now it
doesnt light up nor change the shift
points any clues?my manual shifter
still works

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