What did you do to your NNBS GMT900 Tahoe/Yukon Today?

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Rocket Man

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I painted my hitch cover. I swear every time I order matching paint it comes out slightly different, but maybe it’s the way the light hits it. Also, in case anyone is interested in doing a retrofit I posted some sweet H1 projectors in the classifieds.
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89Suburban

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so it's the brake light switch on the pedal that makes cruise control finicky to set right?


It can be. You can remove it and inspect it. Could be full of dust or lint on the contacts. I cleaned mine up and slapped it back in it's been fine for 3 years or so.
 

Charlie207

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It can be. You can remove it and inspect it. Could be full of dust or lint on the contacts. I cleaned mine up and slapped it back in it's been fine for 3 years or so.
Does that switch kill the throttle? And, if it's sticky, would it cause a lag in throttle response after lifting off the brakes and hitting the gas?
 

Rocket Man

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Does that switch kill the throttle? And, if it's sticky, would it cause a lag in throttle response after lifting off the brakes and hitting the gas?
No. It’s just a brake light switch. The reason it disables the cruise control is because the CC relies on a signal from the brake light switch as one way to disengage the cruise and if the BCM sees a fault in that switch it wont engage the cruise for safety reasons, otherwise if the cruise was engaged and you hit the brakes it wouldn’t disengage and you’d have a run away vehicle unless you could not panic and turn it off manually.
 

Charlie207

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No. It’s just a brake light switch. The reason it disables the cruise control is because the CC relies on a signal from the brake light switch as one way to disengage the cruise and if the BCM sees a fault in that switch it wont engage the cruise for safety reasons, otherwise if the cruise was engaged and you hit the brakes it wouldn’t disengage and you’d have a run away vehicle unless you could not panic and turn it off manually.

I'm running through the logic tree of why there is a delay when I let off the brake and hit the gas, but the engine doesn't respond for .5-1.0 seconds. It's annoying, and not normal, no matter what anyone else says.

I ordered a new TPS today, so we'll see if the 2008 TPS is the culprit.
 

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