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Is This Normal

jsn0801

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jsn0801 Enthusiast

jsn0801

Posted
Posted

I noticed my break lights go off while I am still breaking. Initally they light up normal, but if I lift just a tiny bit(although still slowing rapidly)lights go out. I dont want to get my truck smashed due to this. Is it normal/out of adjustment. I have a 2007 gmt900 with under 5000mi. Any insight would be appreciated.

slomo007 Enthusiast

slomo007

Posted
Posted

Happens on all NBS trucks, unfortunately. There are other threads which talk about it here, try searching for NBS brake lights or something similar.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

I am assuming the brake light switch is still adjustable on these trucks. If so, it is a very simply adjustment and the switch should be located near the middle to top of the pedal rod. If it is like older models, you simply loosen a lock nut and then screw the switch in to bring it closer to the pedal rod.

 

You should not have to do this on a new truck, but from what you said, the light is going off while the pedal is still depressed. I would rather have my brake lights coming on a little too soon instead of a little too late. :)

asilverblazer Senior Enthusiast

asilverblazer

Posted
Posted

Mine are like that too. I try to adjust my braking distances accordingly, a firmer stop so the lights remain illuminated all the time. I suppose if we all start taking our trucks in reporting the problem we might see a TSB or fix sooner...

 

I've tried adjusting the switch on an older truck, and there is a sweet spot that any adjustment at all resulted in them not working at all correctly. Thats why I don't want to mess with adjusting it myself.

pm26 Senior Enthusiast

pm26

Posted
Posted

This may not be relevant to this issue, but Volkswagen had to replace thousands of faulty brake switches on their cars recently. I wonder if GM got greedy and bought their brake light switches from the same cheap source. Nothing like global economy, eh?

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