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If your saying the starter motor won't crank? Make sure the battery has a full charge and battery connections are all good. Then check the wiring circuits at the starter for voltage and ground. When testing at the starter make sure tranny is in park or neutral and the parking brake is set.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure, also check fuel injector pulse. Can you check applicable trouble codes? How long since a tune-up?
WITH A GOOD FUSE TESTER, TEST ALL THE FUSES FUSEBOX UNDER THE HOOD & INSIDE THE VEHICLE. IF THE FUSES ARE ALL GOOD WITH THE TESTER YOU MUST HAVE A BAD BRAKE LIGHT SWITCH OR A BAD TURN SIGNAL SWITCH. THE BRAKE LIGHT CIRCUIT GOES UP THROUGH THE TURN SIGNAL SWITCH & THEN TO THE BRAKE LIGHTS. FIRST OF ALL IS THE BRAKE LIGHT SWITCH GOOD ? THE ORANGE WIRE FEEDS THE BRAKE LIGHT SWITCH, THE WHITE WIRE PUTS POWER TO THE TURN SIGNAL SWITCH, SO THE LIGHTS CAN BE USED AS TURN LIGHTS OR BRAKE LIGHTS. , PUT A TESTER IN THE WHITE WIRE & PRESS ON THE BRAKE PEDAL. IF THE TEST LIGHT LIGHTS UP, BRAKE LIGHT SWITCH IS GOOD, BY THE WAY THE BRAKE LIGHT FUSE MAY BE LABELED" STOP", THE FUSE LABELED" BRAKE" IS FOR THE ABS SYSTEM. TO CHECK THE TURN SIGNAL SWITCH FOR BRAKE LIGHTS, REMOVE THE PLASTIC COVER FROM UNDER THE STEERING WHEEL, PRESS ON THE BRAKE PEDAL, PUT THE TESTER IN THE SMALL YELLOW WIRE, THEN THE SMALL GREEN WIRE. IF THERE IS NO POWER IN EITHER WIRE, THE TURN SIGNAL SWITCH IS BAD.
It is probably the curcuit board and needs to be replaced. This is the thing that you plug the lights in, as the terminals get corroded downin the socket. You can get this at you local parts store. You so not have to go to the dealer. Standard makes this.
Thats because the brake and turn signals run on the same wire. you should check you fuses, look for either marker lamp fuse or running lights or indicator lamps. That is most likely the problem. also turn on just the running lights and check and see if the front running lights come on or not. I hope this helps please rate this thank you
you may have to change the brake light switch at the top of the brake pedal stop by your local GM dealership in the parts department and they be able to print you off pictures and diagrams but check on the part at your local part store because it maybe cheaper wish you the best of luck Michigan Man.
the problen is probably the turn signal switch with a test light check for power at brake switch if no power check for power at turn signal switch the brake lights are incorperated through the turn signal switch