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  1. R

    GMT800 exhaust on a GMT400

    Is it possible to mount a GMT800 exhaust onto a GMT400? The reason I ask is I have noticed that stainless steel exhausts for GMT800's are quite a bit cheaper. I have a 1994 GMC K1500 extended cab with the 6 lug 14 bolt.
  2. R

    No brake with truck running.

    Having an issue with my 1994 Sierra K1500. The brake lights all work with the truck off. If I start the truck the lights in the bed stop working. Third brake light still works. I know the bulbs are good because the hazards and turn signals work. If the truck is running with the hazards on...
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