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Repair guides and support for C/K pickup trucks sold by General Motors under the GMC brand, including the GMC Sierra.

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Why dont my brake light/turn signals work on 1995 gmc sierra 1500?

My reverse lights, brake lightand turn signals do not work. Running lights do. My 3rd brake light(on the cab) does work though. Fuses are good, relay seems good, new tail light bulbs and circuit boards still no fix.

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Hi,

Just wondering if your hazard lights work at all?

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Id recommend checking the grounds. Did you switch to LED or stayed with bulbs?

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Stayed with regular bulbs and hazards do not work

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Id try the grounds remove and clean til u get bare metal even if they look ok. Try reinstall. Any recent work or damage to rear or bed of truck. Perhaps a nicked or overlooked connection.

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No wrecks or damage behind the front cap. Ive checked grounds and followed the wires to the brake petal switch aand everything looks good. I thought maybe the brake switch went bad but the. 3rd cab brake light still works so it doesnt make sense to me

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Check your ground wires by rear bulb sockets. Remove grounds clean contacts with light sanding replace. Try relay to. May seem good but is not. Swap relays around. Must be equivalent size ok ?

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