Question about 2007 Chevrolet Silverado 2500HD

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07 gmc diesel pickup with the "service trailer Brakes"

I have issues with the trailer brakes.. when the light comes on the truck the brakes do not work.. I have takin to several shops and they have no idea whats wrong.. my quick fick for a while was pull the plug and dry it off then reinstall... but that doesn't work anymore.. I heard a rumor that if you level your truck out that it causes this problem also.. I would appreciate any input in solving the big mistery.. Thanx alot

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  • rhinostorm Apr 19, 2009

    Thanx for your help I am going to try your corrective actions.. I will keep you up dated on my process...



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Level the truck out? Not hardly...take contact cleaner and spray and clean the plug...check the fuses under the hood for your brake lights....then check the ground wire on each light...most of the time it's a bad ground...use a voltage tester to see if you're getting power on the other side of the plug (the trailer side of the plug...if you're getting power then trace it all the way back until you get to the lights...if you still have power all the way back to the lights, then your ground wire to each light is bad...if no power on the trailer side of your plug then check the truck side of the plug, if you get power on that side, then your trailer plug is bad and needs to be replaced....check the pins on the truck side of the plug, if no power, then you either have a bad fuse under the hood (which is common) or the truck side of your plug is bad and needs to be replaced...don't listen to anyone about leveling out the truck...it's electrical and has nothing to do with the level of the truck.

Posted on Apr 19, 2009

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