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

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,679
Reaction score
52,949
Location
Oregon
Trans guy checked out the Hoe today. No hard codes stored. Drove around with the scanner hooked up and everything is good to go. Shifted great. Guess I'll see what happens.
Sounds like what that thread was talking about- it's probably just a hassle due to the stall and tune. You could always carry an OBD reader with you so you can clear the codes in case it puts you in limp mode like what was happening to those guys. Good luck. If I was you, I'd probably get an Autocal from BlackBear. The help they've given me has saved me tons of diagnostic money and headaches. I can datalog, send it in, and they tell me what's going on. I'd bet they could tell you what's happening with your trans and maybe fix it, turn on your efan, etc. Plus tunes for life.
 

KReed450

Member
Joined
Sep 28, 2017
Posts
36
Reaction score
50
I installed some blue LED floor lights in the front and rear

IMG_0403.JPG IMG_0404.JPG
 

Tonyrodz

Resident Resident
Joined
Feb 16, 2012
Posts
33,199
Reaction score
51,441
Location
Central Jersey
Sounds like what that thread was talking about- it's probably just a hassle due to the stall and tune. You could always carry an OBD reader with you so you can clear the codes in case it puts you in limp mode like what was happening to those guys. Good luck. If I was you, I'd probably get an Autocal from BlackBear. The help they've given me has saved me tons of diagnostic money and headaches. I can datalog, send it in, and they tell me what's going on. I'd bet they could tell you what's happening with your trans and maybe fix it, turn on your efan, etc. Plus tunes for life.
I actually like that idea.
 

mmeachem

Member
Joined
Apr 12, 2010
Posts
1,031
Reaction score
96
Over the last couple of weeks I’ve washed her down, removed faded door edge guard, new battery, new tray, washer pump and lines, leds inside, reverse pods, led tails.

Began wiring in come led cobs under the hood but they don’t turn off when I close the hood, any suggestions?


Sent from my iPhone using Tapatalk
 

bottomline2000

Full Access Member
Joined
Oct 21, 2009
Posts
1,722
Reaction score
991
Location
Dallas, TX
I actually like that idea.
The autocal would make your problems ez to fix. Kill the code in the tune and u dont have to worry about it again I just ran my truck thru state inspections and no issues.

I've hit the tuning limits of Blackbear and efilive though and can't keep my converter locked with 0 throttle input so I may have it tuned with hptuners. I got some more changes to do first, but if I sell my autocal I'll let ya know..

Sent from my SAMSUNG-SM-T377A using Tapatalk
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,679
Reaction score
52,949
Location
Oregon
Over the last couple of weeks I’ve washed her down, removed faded door edge guard, new battery, new tray, washer pump and lines, leds inside, reverse pods, led tails.

Began wiring in come led cobs under the hood but they don’t turn off when I close the hood, any suggestions?


Sent from my iPhone using Tapatalk
What are they wired to? I ran mine off my stock underhood light that has a built-in gravity switch. If you don't have one you can add it.
 

05Single

afraid of the dark
Joined
Feb 26, 2015
Posts
8,244
Reaction score
11,646
Over the last couple of weeks I’ve washed her down, removed faded door edge guard, new battery, new tray, washer pump and lines, leds inside, reverse pods, led tails.

Began wiring in come led cobs under the hood but they don’t turn off when I close the hood, any suggestions?


Sent from my iPhone using Tapatalk
I used a negative cutoff switch. Works perfectly. Hood closed the negative separates from the body. Hood opens the spring pushed the negative against the body allowing the light to ground and turn on.
20171008_093430.jpg
20171008_093436.jpg
 

mmeachem

Member
Joined
Apr 12, 2010
Posts
1,031
Reaction score
96
What are they wired to? I ran mine off my stock underhood light that has a built-in gravity switch. If you don't have one you can add it.
I used a negative cutoff switch. Works perfectly. Hood closed the negative separates from the body. Hood opens the spring pushed the negative against the body allowing the light to ground and turn on.
View attachment 184351 View attachment 184352
Yes I do have the underhood light from the factory and when I connected it to it, the light stayed on but I know see the gravity switch is after where I connected and I’m not sure how to connect to there.

The negative switch may be the way to go. Unless I can figure out how to connect to the factory switch


Sent from my iPhone using Tapatalk
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,679
Reaction score
52,949
Location
Oregon
Yes I do have the underhood light from the factory and when I connected it to it, the light stayed on but I know see the gravity switch is after where I connected and I’m not sure how to connect to there.

The negative switch may be the way to go. Unless I can figure out how to connect to the factory switch


Sent from my iPhone using Tapatalk
Just open up the switch and solder wires to the brass contacts at each end of the stock bulb. Right where the bulb connects. I thing you need to drill a hole for the wire to exit through.
 

Tonyrodz

Resident Resident
Joined
Feb 16, 2012
Posts
33,199
Reaction score
51,441
Location
Central Jersey
Over the last couple of weeks I’ve washed her down, removed faded door edge guard, new battery, new tray, washer pump and lines, leds inside, reverse pods, led tails.

Began wiring in come led cobs under the hood but they don’t turn off when I close the hood, any suggestions?


Sent from my iPhone using Tapatalk
I'm having the exact same issue, I just disconnected them for now.
Wouldn't be hard....just a plastic wedge shape with the correct bolt pattern.....patent pending!
I think they'd only sell on the forum, lol! I don't think anyone else would even notice.
The autocal would make your problems ez to fix. Kill the code in the tune and u dont have to worry about it again I just ran my truck thru state inspections and no issues.

I've hit the tuning limits of Blackbear and efilive though and can't keep my converter locked with 0 throttle input so I may have it tuned with hptuners. I got some more changes to do first, but if I sell my autocal I'll let ya know..

Sent from my SAMSUNG-SM-T377A using Tapatalk
What's the autocal go for, and how does that work again? Thx for the first dibs offer too!
 

Rocket Man

Mark
Supporting Member
Joined
Dec 25, 2014
Posts
26,679
Reaction score
52,949
Location
Oregon
Yes I do have the underhood light from the factory and when I connected it to it, the light stayed on but I know see the gravity switch is after where I connected and I’m not sure how to connect to there.

The negative switch may be the way to go. Unless I can figure out how to connect to the factory switch


Sent from my iPhone using Tapatalk
Here's a couple pics of mine. I just soldered to the brass clip things that the bulb snaps into. If you take the back cover off there's easy access on the back side.
IMG_5999.JPG
IMG_6001.JPG
IMG_6005.JPG
 

mmeachem

Member
Joined
Apr 12, 2010
Posts
1,031
Reaction score
96
Just open up the switch and solder wires to the brass contacts at each end of the stock bulb. Right where the bulb connects. I thing you need to drill a hole for the wire to exit through.
Sounds like a plan, appreciate it. I’m doing one cob on the driverside now. And maybe one later on the pass towards the front.


Sent from my iPhone using Tapatalk
 
Last edited:

bottomline2000

Full Access Member
Joined
Oct 21, 2009
Posts
1,722
Reaction score
991
Location
Dallas, TX
I'm having the exact same issue, I just disconnected them for now.

I think they'd only sell on the forum, lol! I don't think anyone else would even notice.

What's the autocal go for, and how does that work again? Thx for the first dibs offer too!
Autocad sells for $600 with tune. I think it was $300 for me since I was already street tuned by Justin. Mine would be a lot less.

It plugs into the OBDII port and you can data log all the sensors so you can go back and see how the truck performed on a laptop. You can send data logs to Justin and he can send uodates tunes via email. Upload them to the Autocal using a laptop, disconnect from the laptop, go out to the truck and upload the revised tune.

Its a lot easier than pulling your pcm and sending it to him and having your truck be down and risk damaging the pcm during shipping or the pins each time u install the pcm. No crank relearns. You can also read and clear trouble codes.

It's neat and I don't want to switch but my circumstance warrants I look at other options and none are cheap..

Sent from my SAMSUNG-SM-T377A using Tapatalk
 

inmypassatlife

Full Access Member
Joined
Feb 21, 2017
Posts
979
Reaction score
672
Well, that was a bust. Security light never stops blinking. Does removing the TCB or TBC, I forget which order it's in, reset the BCM memory? Thinking I'll pull that overnight and see what the outcome is in the morning
well, seems like I can't win this weekend. replaced Ignition housing and the ignition cylinder. The damn truck never goes into the relearn procedure and the security light blinks nonstop. No 10 minute, 20 minute, or 30 minute window works the light just never stops flashing to even allow me into the first step of the relearn procedure. So, from research online and talking to a few 12volt installers I used to work with, we believe that maybe the BCM is on permanent lock out.

Anyone here ever deal with this? I ordered a BCM should be here Tuesday.
 

Forum statistics

Threads
137,782
Posts
1,992,157
Members
102,777
Latest member
wwiizz
Back
Top