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What did you do to your NBS GMT800 Tahoe/Yukon Today?
Changed oil and filter, differential and transfer case fluids. Put in led DRLs. Put on the winter wheels and tires finally. And a of course gave it a bath.- Mechahead
- Post #9,265
- Forum: General Discussion
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Something odd is up
Sounds like a bad pump(fuel pressure test) or a blocked cat(backpressure test). An easy way to check for a blocked cat is to take an upstream O2 sensor out and see if it runs any better. Its rather crude and CAN be dangerous, but it will give you an idea of whats up.- Mechahead
- Post #2
- Forum: Engine & Drivetrain
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What did you do to your NBS GMT800 Tahoe/Yukon Today?
Nice. I have been looking for a way to set up a different holster in my truck. I had one under the steering column but just didn't care for it. Plus it didn't hold any extra mags.- Mechahead
- Post #9,181
- Forum: General Discussion
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2009 Yukon XL - NO rear speakers working
As long as they work.- Mechahead
- Post #4
- Forum: Audio & Electronics
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2009 Yukon XL - NO rear speakers working
I have found ALOT of speaker problems on these years of trucks are simply bad speakers. I had a Avalanche come in not long ago that only the pillar tweeters were working. It was just the door speakers themselves. Had another garage call me last week for advise with a truck with the same...- Mechahead
- Post #2
- Forum: Audio & Electronics
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Computer re-flash, updating....dealer charge item?
Unless the vehicle is still under warranty or the flash is part of a recall, flashing is a customer pay item.- Mechahead
- Post #2
- Forum: Engine & Drivetrain
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What did you do to your NBS GMT800 Tahoe/Yukon Today?
Reprogrammed most of the modules to the latest calibrations, and reset my tire size in the ABS module again. I keep playing with tire sizes to balance out a full wheel arch and power/braking efficiency.- Mechahead
- Post #9,014
- Forum: General Discussion
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heated seat or button question
Mine does the exact same thing and by the resistance measurements my elements are shot. -
Bose headunit
I am still trying to find a connector pinout diagram.- Mechahead
- Post #4
- Forum: Audio & Electronics
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Extremely spongy brakes after gmt900 upgrade...
Yeah, you will need to cycle the ABS to finish the bleed procedure and get a good pedal. The gravel road trick will help, but the only way to be sure is with a scan tool. It doesn't HAVE to be a tech II, just a bi-directional tool with ABS capability. You should be able to talk a local garage...- Mechahead
- Post #4
- Forum: Engine & Drivetrain
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What did you do to your NBS GMT800 Tahoe/Yukon Today?
Finally got around to rebuilding and installing then programming the cluster I picked up with a trans temp gauge. Then took a look at the recently stationary drivers seat. Seems one of the forward/back drive cables destroyed itself. Not sure what happened, everything moves fine so its not like...- Mechahead
- Post #8,953
- Forum: General Discussion
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Pls help, signal won't stop clicking
I have had a few that were the multifunction switch. It was real common on other gm models.- Mechahead
- Post #5
- Forum: Audio & Electronics
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What did you do to your NBS GMT800 Tahoe/Yukon Today?
Finally put a coat of black on the core support bars behind the grill. Looks much better now that I can't see them.- Mechahead
- Post #8,594
- Forum: General Discussion
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