Question about 1991 GMC Sierra

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1991 GMC 2w 4.3L 4speed manual. The brake lights stay on all the time after the truck is started. I have to pull the fuse to get them to turn off. I have moved the switch on the brake pedal but it doesn't seem to affect the brake lights. The parking brake indicator in the dash is always on when the truck is running also. Any suggestions would be appreciated. Thank you, Terry

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I have the same problem with my daewoo because the switch underneath and on top of my brake pedal has a push in type plastic nail so this switch might need to be changed. You should also check all fuses to see if any blowned but if any are blowned that you should have a short somewhere that is making this fuse blowned.

Posted on May 27, 2011

  • tle9194 May 30, 2011

    I changed the brake switch and the lights stayed on until I got out my volt meter and started measuring the power coming thru the switch. I adjusted the contact on switch to the correct distance for the brake pedal and the problem was solved. Thank you.

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