Turns out the stock brake light switch was going bad.
2011 silverado brake light switch.
Pt auto warehouse bls 450 stoplight brake light switch with fixed pedals.
Start at the fuse box under the hood and make sure the brake lights fuse is not blown that the terminals are free of corrosion and that the connections are tight.
How to replace a broke or worn out brake light switch on your 2011 gm truck.
This switch is usually the reason the cruse control stops working and is only ab.
If you think about it a light tap from the brake pedal disengages the cruise instantly.
Acdelco 15926102 gm original equipment trailer brake control switch assembly.
Then check the brake light switch on the bake pedal arm.
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Used 2011 chevrolet silverado 1500 lt with 4wd towing package preferred equipment package suspension package keyless entry fog lights trailer hitch trailer wiring trailer brake controller alloy wheels and 17 inch wheels.
This particular 2009 sierra has adjustable pedals so those without may be a different pr.
In many cases they actually experience a problem with the general motors brake light switch.
Back probe the switch terminals with a test light.
Had an issue in my 2011 gmc sierra where the traction control and abs warning lights would sporadically turn on.
Various forums said it was a fuse or a speed sensors or water in connection.
In the brake light switch failures i ve seen the defective switch sends a signal to the cruise that the brakes are applied.
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How to fix and not replace your brake switch nov 01 2017 5 08am should add to this burnish the contacts with a piece of regular bond paper till they are shiny and clean the old grease out with alcohol and re lube with silicone grease.
A quick video showing how to replace the brake switch on a gm truck.
Chevrolet 2011 silverado 1500 5 3l v8 electrical switch relay brake light switch.
Only one of the switch terminals should turn on the test light.