Question about 2002 GMC Envoy

1 Answer

4x4 dont work

I ck all fuses and shifter motor and all are good .there os power at sw. but no lites on sw. can u help

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  • Anonymous Aug 26, 2008

    same problem

  • Anonymous Sep 06, 2008

    The light on the switch will flash when first started, I have to shift the transmission into neutral and then change the 4wd position to AWD and back to 2wd to get the light to stay on...

  • janko1121 Oct 08, 2008

    i have a 2002 gmc envoy my 4 wheel drive dont work and the light on the switch ony blinks when i turn the key to on position any solutions?



1 Answer

I had to have something replaced (about $400 if I remember correctly) so it would shift into 4-wheel. Maybe you are still covered.

Posted on Sep 01, 2008


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My car is losing power, and the fuel pump wont come on. it wont turn over. i replaced the ignition lock. what else could it be besides the alternator or my starter?

you are too vague in your questions, and I need answers in order to help you. . is the car totally dead? is the battery good? do the headlights work? what hapens when you turn the key on. the lights on the dash should light up, the ck engine light should lite up. you should hear the fuel pump come on for 2 seconds and then shut off. if the ck eng light does not come on, ck all fuses and the ecm relay. if you dont here the fuel pump come on, ck all fuses and the fuel pump inertia switch. you need to start somewhere. dont replace any parts until testing reveals them bad, or your going to spend a lot of money on parts you dont need. if you dont know how to test, fiind a good shop to take your car to. it will cost less than guessing and replacing parts.

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No 4x4

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4 wheel drive selector won't move to select 4x4

I am guessing the way you wrote this that the switch moves but 4H is not activating. If this is the case, then check the fuses/breakers as described in your fuse/relay section of the manual. If these are good, then check the connections to the 4x4 motor on the txfer case. Sometimes the connection there gets corroded or damaged while 4wheeling.

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1 Answer

Pulling the 4x4 shifter

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