Question about 2002 GMC Sierra 2500HD
I have an 02 GMC 2500 HD with an allison trans,it just quit going into tow-haul mode......the trans works fine in reg mode
THERE HAVE BEEN ALOT OF PLOBLEMS WITH THE SHIFTER HANDLE/SWITCH. THE BEST WAY TO VERIFY CONCERN IS USE A DIAG. SCANNER & VIEW TRANSMISSION DATA DISPLAY WHILE ENGINE RUNNING. THE SWITCH IN THE SHIFTER IS FAULTY. IF YOU SEE NO INPUT CHANGE WHILE DEPRESSING SWITCH THIS IS YOUR CONCERN.
Posted on Nov 08, 2008
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Posted on Jan 02, 2017
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