4 wheel drive
#1
09-21-07, 11:39 AM
4 wheel drive
I have a 1999 GMC Envoy, 4wd not working, and yes i tried changing the dash switch no difference. I try to go into 4 Hi and the light keeps flashing same for 4 Auto, but it does go into 4 Lo i can also hear the diff engage but it doesn't for the other modes .Any ideas?
#4
09-21-07, 03:15 PM
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If it's working in 4 lo, I suspect it might be a solenoid somewhere for the transfer case. You might want to pick up a repair manual and trace the electrical wiring.
#5
09-21-07, 08:57 PM
well you can pull codes with a scan tool on it also i have seen a bunch come thru where the t case module terminals get all corroded could check there first it is on the right side behind the panel on the side
check the terminals unplug it and look for green
check the terminals unplug it and look for green
