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91 gmc 3500 van brake light sensor comes one stops shifting right

Have a 91 GMC 3500 van. Brake light comes on (more dim than when brake is set)and van quits shifting right. Already replaced VSS. Ideas?

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  • GMC Master
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You need to know witch ABS code and PCM code first before any repair.
hope it helps

Posted on Mar 20, 2014

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Posted on Jan 02, 2017

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SOURCE: Brake lights quit working.

if all fuses and bulbs are ok get to the brake switch and see ifits stiff or stuck, if it just has two wires on it you could join themtogether to see if the brake lights come on though obviuosly dont leave them joined.Good luck davelee

Posted on Mar 23, 2009

  • 5 Answers

SOURCE: 1997 gmc 3500 box truck. no brake lights. changed

Check the fuse.

Posted on Sep 18, 2009

  • 12650 Answers

SOURCE: gmc yukon has the abs & parking brake light

you have to fix the problem with ur brakes- first check the wiring ,connectors and connection clips to the abs sensors and modulator if looks ok than have truck scanned some auto stores such as auto zone / advanced auto do it for free the code will give u a start point towards fixing ur problem--visual inspection of brakes doesnt always show problem

Posted on Nov 26, 2009

  • 77 Answers

SOURCE: replace brake light switch 99 gmc suburban

on brake pedal switch has a hair pin clip pull it un plug switch slide it off pedal etc.

Posted on Jul 25, 2010

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SOURCE: Brake lights won't come on

check for a bad brake light fuse! if not the fuse, the brake light switch operates brake lights and if bad you will not be able to shift it out of park, as well as the brake lights not coming on.! because you have to put foot on brake to do so. if bad switch, it wont let it out of park. it could be just out of adjustment also!! good-day !

Posted on Aug 28, 2011

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2 Answers

My 98 gmc jimmy will not shift out of park


possibly the neutral safety switch connected to the brake pedal is bad. when you apply foot to brake , shouls hear a click with key in run position, this would be the safety solenoid retracting itself from shift linkage, allowing shift lever to move. try pumping rapidly, but easily the brake pedal to see if you can hear click, and or shift from park.

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check for a bad brake light fuse! if not the fuse, the brake light switch operates brake lights and if bad you will not be able to shift it out of park, as well as the brake lights not coming on.! because you have to put foot on brake to do so. if bad switch, it wont let it out of park. it could be just out of adjustment also!! good-day !

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Van got hit on right side brakes were new after being hit van would not stop countinued to roll down hill until i turned van now van has no brake system now


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Does it have a trailer hitch and wiring? If so, check to make sure connector is not shorted out and double check your fuses and/or replace fuse. It may look good but I've seen some that were burned out of inspection view. You might also want to trace wiring back to brake lights, just in case snow or build up pull connectors apart.

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The SERVICE BRAKE SYSTEM light comes on when driving and stays on


i had a customer with a 2004 gmc sierra 2500hd 2wd that stated that the srevice brake system light came on while driving. the transmission would shift hard and erratic plus the speedometer was erratic. the check engine light came on with two codes p0502 and p0503(vehicle speed sensor A low input and vehicle speed sensor A intermittent/erratic. i replaced both vehicle speed sensors mounted on the driver's side of the transmission. both of the speed sensors were the same. test drove the truck after and all issue were solved.

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1997 GMC Savana 5.7 L conversion van. Cranks but wont start


look under the hood on the right side where your brake fluid is..There is a black box to the farest right of the brake fluid. take off the lid to this box were you will find fuses..Reach in and feel the fuses to see if any are loose.The largest fuses in the front, push down on those and then try to start it up..Take them out look at them make sure there ok if this dont work..they the one bad might need to be replaced..

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1997 gmc 3500 box truck. no brake lights. changed


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Jul 25, 2009 | 2000 GMC Savana

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2002 yukon denali abs problem


does the abs light come on ? there was one cause on the van that i owned (ford windstar) that can happen to any vehicle. the ring that the sensor reads from can become crack. that causes the teeth to not be aligned properly. just curious... have you had your brakes replaced recently ?

Feb 26, 2009 | 2001 GMC Yukon

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