Disconnect the neg cable from the battery for a moment or two. This will reset the light but it will come back on if the reason the light came on in the first place wasn't fixed.
How do you reset the oil light on gmc c7500
1988 gmc safari Steering column switches and ignition key lock cylinder replacement?
How do i reset a service engine light on a 2005 gmc c6500 cat engine
There is a fuel pump relay switch for your 1988 GMC Safari. You can find the fuel pump relay switch at most auto-parts stores.
The computer will reset itself after a few driving cycles. To reset the Check Engine light you can try this. Disconnect the positive battery cable for 20 minutes. If that does not work you will need an OBD2 scan tool to reset the light. Go to the place where you bought the O2 sensor and ask them to reset the light. Some will and some won't.
take it to a gmc dealer
how to reset abs warning light on 2000 gmc Yukon
Press the reset button
There isn't one.
GMC safari has twoconverters
in order to clear the codes on your 200 safari first you need to fix the problem in the awd system and should clear by it self. The only thing that can turn that light is speed sensors wrong, speed sensors are not the only thing that will turn the service AWD light on. Wheel speed sensors are related to the ABS light
Look either at the bottom of radiator or on the rear of the radiator bottom