I need a wiring digram for a 2002 GMC Safari - 2002 GMC Safari

hope it helps ..this diagram is for a 2002 could be the same

I would check for broken wire/wires in the heavy rubber boot that flex's everytime you open and close the door. at frt. of door all the wires run through it to door from cowl. very common problem on both sides

its letting you know that something is wrong in the brake system, it could just need fluid, check that first , if that doesn't correct the light coming on, have the brakes checked by a shop

2002 Safari 4.3L engine, cam sensor, same as pick-up coil, sits in ignition distributor, will be the one with three wire connector, held on with two small bolt's in the distributor.

use a ratchet without any socket on the idler/tensioner pulley, this will loosen the tension on the belt to be able to remove it. after that, it's easier to remove the alternator with the braket still on, that bracket has a few long bolts 3-4 to remove, the, disconnect wires from alternator. installation is reverse procedure as always

before i read your entire post i was going to say a bad wire arc to ground but a bad cap can do the same thing. hope this helps good luck

probably a worn out hinge, needs to go to a bodyshop.

remove panel, if any, check for loose wires, clean and lubicate 

The wiring bundle in the right rear (jack) storage compartment contains the trailer wiring harness (if so equipped).
The color code is:
Brown- Running lights
Yellow- Left turn signal
Dk Green- Right turn signal
Lt Grn w/white stripe- GROUND
Lt. Green- back-up lights
White- CHM stop lamp
Orange-fused Aux
Blue- unfused Aux

as found on my 2002 Safari.

this is not an easy task if you dont know where the oil pump is you need a garage its in the bootom of the motor u have 2 remove oil pan