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service 4wheel drive [Archive] - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

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t-roy
08-12-2008, 10:22 PM
my service 4wheel light drive came now my selector switch does not seem to be working and will not go into 4wheel drive at all:confused:

bentcougar
08-12-2008, 10:26 PM
have you checked all of the fuses?

t-roy
08-12-2008, 10:30 PM
not yet is thier one for that

WOOLUF1952
08-13-2008, 12:09 AM
:yes: I've had that problem and the fuse was good. Must've been bad contact. I took the fuse out to check it, it was good, I put it back in and the selector lit up and all was good.:woohoo:

ThEx CoNvOy x07
08-13-2008, 12:50 AM
:yes: I've had that problem and the fuse was good. Must've been bad contact. I took the fuse out to check it, it was good, I put it back in and the selector lit up and all was good.:woohoo:

:iagree: Same with mine!

t-roy
08-13-2008, 04:08 PM
Pull and checked all the fuses and disconnected the battery and it still came back on.

petevw
08-13-2008, 04:15 PM
It's possible the TCM is shot...happened to mine, and I tried all the fuse pulling, battery disconnect, etc, but nothing worked.

Ended up going to the stealership...pretty expensive for what it is....I think the whole thing w/ labor was $375, but don't quote me on that.

You might be able to get a local repair shop to do it cheaper if they have the right tech testing tools to recalibrate it to the computer.

t-roy
08-13-2008, 05:02 PM
is safe to drive it without doing more damage:)

petevw
08-13-2008, 05:22 PM
Yes, i had the same question for the dealer, and as long as it's an electrical issue, no problem running the truck.

Mine happened in Sept. 2 yrs ago, and I waited until just before snow season (Middle of Dec.) before I got it done....had to save my pennies to get it done.:sadcry:

WOOLUF1952
08-13-2008, 05:24 PM
:m2: Should be ok. You just won't have 4x4. But I would get it checked when possible.

t-roy
08-13-2008, 07:31 PM
we just went to the autozone to see if they could read code i guess save up pennies and go to the dealer thanks for all your guys help:(