What did you do to your NBS GMT800 Tahoe/Yukon Today?

[Bombsquad85]

Either the MAF is bad or there's an open circuit in the harness between it and the PCM. If you can find the pinouts for the plug(s) on the ECM, you can check for continuity. Do this before you replace the MAF. Or, if you know someone with a similar vehicle that will let you, swap the MAFs and see if you get a valid reading. You're currently running on a speed-density tune of sorts. I'm surprised you haven't noticed odd shifting in the trans.

Funny you mention that. My truck is very sluggish and is very slow to shift.

As far as an open in the circuit from what I've observed that isn't the issue. I've tested the wiring harness with a multimeter. When I went to test the signal I wasn't getting any wavelength change during different RPM ranges

 

[iamdub]

..As far as an open in the circuit from what I've observed that isn't the issue. I've tested the wiring harness with a multimeter. When I went to test the signal I wasn't getting any wavelength change during different RPM ranges

By that, git yo'self a new MAF!

 

[Bombsquad85]

By that, git yo'self a new MAF!

Already did. Got a replacement one from rockauto already shipped!

 

[Rocket Man]

Already did. Got a replacement one from rockauto already shipped!

Rock Auto FTW!

 

[Rocket Man]

Finished the trans install in a day, the old man still has what it takes.

 

[Sam Harris]

Finished the trans install in a day, the old man still has what it takes.

Awesome. Let’s hear the Beast!

 

[DIsney]

Stopped at AAP today and for no reason picked up the Meguiars headlight restoration kit. I tried it out, but it didn't do enough. So back to the store. Bought some 320, 600, 800, 1000, and 2000 grit sand papers. Did the process again and NOW i'm happy with it. Using the 320 (lightly) really cut through all the bad stuff. Then the steps to smooth it all out went pretty easy. Probably spent way too much time, but they look much much better now. Being as i'm kinda OCD i'll probably still buy some new GM lamps, but this will hold me over for a while.

 

[BADRIDES]

Stopped at AAP today and for no reason picked up the Meguiars headlight restoration kit. I tried it out, but it didn't do enough. So back to the store. Bought some 320, 600, 800, 1000, and 2000 grit sand papers. Did the process again and NOW i'm happy with it. Using the 320 (lightly) really cut through all the bad stuff. Then the steps to smooth it all out went pretty easy. Probably spent way too much time, but they look much much better now. Being as i'm kinda OCD i'll probably still buy some new GM lamps, but this will hold me over for a while.

That is a good way to get them smooth.

 

[BG1988]

I used to use incense sticks to find vacuum leaks in plumbing, never tried it on a motor vacuum issue. I’ve used starter fluid on motors, never tried brake fluid. Just have to be extremely careful since it’s so flammable.

don't use brake fluid lol or brake cleaner (it damages paint)

and goes everywhere that is why using body spray stuff is better as you can control where it goes better

 

[BG1988]

MAF sensors ahhh just got mine