How it replace the brake light switch on a 2008 avalanche

These were known for having faulty brake light switche that would cause that problem as well as cruise control inop. I would check that first. It operates the shift-lock solenoid which releases the shifter. There were also some problems with the ignition switches, but mostly on the gm cars.

Not sure on the throttle position sensor issue but the no cruise control issue can often be the brake switch. Very, very common. Switch is relatively cheap and it is easy to replace.

problem ground wire on the BCM is logical after the cluster replacement

if the brake light switch is faulty none of the brake lights will work.......cheers

There should be a brake light switch under the drivers side mounted on the brake pedal it may have broke or come out of adjustment in any case you could push the switch in by hand and tape it as to not drain your battery until you can get a replacement part for it if indeed it needs to be replaced otherwise it may just need to be adjusted.

the brake light switch is actually underneath the brake pedal itself, you just have to loosten and unplug it and, replace with a new one

It should be under the dash near the top of the brake pedal arm. You can adjust it so the button on the switch releases when you push the brake pedal. They used to screw in and out to adjust.

Good luck.

It is Possible that the Brake light SWITCH is STUCK or Missadjusted Check this it is Located ABOVE the Brake Pedal

probably the switch at the top of the pedal is already defective. that switch turns on the brake lights when you depress the pedal. you may have to just replace that switch.

get the lockpick. gen5. about $249. just google for your vehicle