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

[mwilson62000]

Thursday on way home from work, both front and rear ac blower motors stopped at same time and I smelled burning. Found a burnt and broke wires at the front blower resister.

PO didn’t splice very well when resister was replaced previously. Went ahead and replaced resistper and Re-spliced and front blower worked, but not rear. Replaced rear resister, now all good.
Cleaned Throttle Body and MAF sensor. Didn’t look like throttle body had ever been cleaned. Surprised I didn’t have performance issues with all the carbon I cleaned out.

 

[Rocket Man]

Thursday on way home from work, both front and rear ac blower motors stopped at same time and I smelled burning. Found a burnt and broke wires at the front blower resister.
View attachment 346375PO didn’t splice very well when resister was replaced previously. Went ahead and replaced resistper and Re-spliced and front blower worked, but not rear. Replaced rear resister, now all good.
Cleaned Throttle Body and MAF sensor. Didn’t look like throttle body had ever been cleaned. Surprised I didn’t have performance issues with all the carbon I cleaned out.
View attachment 346376

That never blew a fuse?

 

[Kman]

Long time no talk guys, it’s been a few years. My 2001 Tahoe has been sitting in my dads warehouse for a few years. My dad would take it once a month to get lunch but besides that it has sat for a couple of years.

Anyways I went and picked up the Tahoe, and did the following. Been driving it around for the first time in a couple of years, I forgot how awesome and comfy the GMT800 trucks are.

- Oil change
- Re-installed my catch can after getting it smogged
- Redline Fuel System Cleaner
- Full detail (waxed exterior, cleaned leather seats, vacuumed and used a Bissel Little Green thing to clean the carpets
- Ordered a few parts for the Tahoe (steering wheel cover, programmed new key fobs, 6 inch shorty antenna, installed a new transmission access door on the bell housing, new bump stops in all four corners)

Here are a few pics, not bad for a 2001 model that was one of the first couple hundred produced in 2000. Mine was of of the early 2001 Tahoes given to Chevy GM’s to drive around. It was sold to my moms best friend with 800 miles on it and then to me in 2009 with 121,000 miles on it. The Tahoe currently has 210,000 miles.

 

[mwilson62000]

That never blew a fuse?

No. Surprised me when I tested all hvac/blower fuses.

 

[Doubeleive]

Got stopped last night, and was told I had a brake light out..

So I put some new bulbs in the back.. Thinking about going with the LED variants later.. But for now, gotta watch my budget.

I wish they would pull the dam people over around here that drive around with NO LIGHTS at all!, once they are in a blind spot they are risking there life and mine, I swear 2-3 a week.

 

[Rocket Man]

Long time no talk guys, it’s been a few years. My 2001 Tahoe has been sitting in my dads warehouse for a few years. My dad would take it once a month to get lunch but besides that it has sat for a couple of years.

Anyways I went and picked up the Tahoe, and did the following. Been driving it around for the first time in a couple of years, I forgot how awesome and comfy the GMT800 trucks are.

- Oil change
- Re-installed my catch can after getting it smogged
- Redline Fuel System Cleaner
- Full detail (waxed exterior, cleaned leather seats, vacuumed and used a Bissel Little Green thing to clean the carpets
- Ordered a few parts for the Tahoe (steering wheel cover, programmed new key fobs, 6 inch shorty antenna, installed a new transmission access door on the bell housing, new bump stops in all four corners)

Here are a few pics, not bad for a 2001 model that was one of the first couple hundred produced in 2000. Mine was of of the early 2001 Tahoes given to Chevy GM’s to drive around. It was sold to my moms best friend with 800 miles on it and then to me in 2009 with 121,000 miles on it. The Tahoe currently has 210,000 miles.

Access door on the bell housing? Pics and an explanation please!

 

[Tonyrodz]

Access door on the bell housing? Pics and an explanation please!

I was thinking he might've replaced that inspection window/door on the lower bell housing. Mine is missing.

 

[Rocket Man]

I was thinking he might've replaced that inspection window/door on the lower bell housing. Mine is missing.

Ahh. That’s not as exciting as I was hoping. I don’t look at that as an access door unless I was a tiny mouse.

 

[Kman]

I was thinking he might've replaced that inspection window/door on the lower bell housing. Mine is missing.

Yes, correct. Years ago I had a major service done on my Tahoe by having the rear main seal and oil pan gasket replaced. When I got the truck back that little piece of metal was missing. It always bothered me and I saw the GM part was on Amazon for $8 so I picked one up.

 

[Rocket Man]

I’m almost afraid to jinx myself but I think I fixed my trans without touching a wrench. Many of you might know it’s been going into limp mode for the last 6 weeks or more and throwing DTC P0785 for the 3-2 downshift solenoid. I have been trying everything I could think of including replacing that solenoid and a bunch of other stuff. I have the internal wiring harness and all the internal electronics ready to install. My trans builder told me they’d like to see what happens if I disable that code- and told me their builds don’t even use that solenoid. I think they told me it might be setting the code because of my high stall. I bought HP Tuners and figured out how to set that code to not report (thanks @randeez and @Dantheman1540 ) and flashed that tune, and I just finished a long drive- it’s still shifting fine. I will have to do more testing but it looks like that code was causing the PCM to put the trans in limp mode. Wish me luck tomorrow.

 

[ivin74]

I’m almost afraid to jinx myself but I think I fixed my trans without touching a wrench. Many of you might know it’s been going into limp mode for the last 6 weeks or more and throwing DTC P0785 for the 3-2 downshift solenoid. I have been trying everything I could think of including replacing that solenoid and a bunch of other stuff. I have the internal wiring harness and all the internal electronics ready to install. My trans builder told me they’d like to see what happens if I disable that code- and told me their builds don’t even use that solenoid. I think they told me it might be setting the code because of my high stall. I bought HP Tuners and figured out how to set that code to not report (thanks @randeez and @Dantheman1540 ) and flashed that tune, and I just finished a long drive- it’s still shifting fine. I will have to do more testing but it looks like that code was causing the PCM to put the trans in limp mode. Wish me luck tomorrow.

That's great news, I bet you are glad that nightmare is over.

 

[Bigkevschopshop]

I’m almost afraid to jinx myself but I think I fixed my trans without touching a wrench. Many of you might know it’s been going into limp mode for the last 6 weeks or more and throwing DTC P0785 for the 3-2 downshift solenoid. I have been trying everything I could think of including replacing that solenoid and a bunch of other stuff. I have the internal wiring harness and all the internal electronics ready to install. My trans builder told me they’d like to see what happens if I disable that code- and told me their builds don’t even use that solenoid. I think they told me it might be setting the code because of my high stall. I bought HP Tuners and figured out how to set that code to not report (thanks @randeez and @Dantheman1540 ) and flashed that tune, and I just finished a long drive- it’s still shifting fine. I will have to do more testing but it looks like that code was causing the PCM to put the trans in limp mode. Wish me luck tomorrow.

Fingers crossed for you man.

 

[Dantheman1540]

I’m almost afraid to jinx myself but I think I fixed my trans without touching a wrench. Many of you might know it’s been going into limp mode for the last 6 weeks or more and throwing DTC P0785 for the 3-2 downshift solenoid. I have been trying everything I could think of including replacing that solenoid and a bunch of other stuff. I have the internal wiring harness and all the internal electronics ready to install. My trans builder told me they’d like to see what happens if I disable that code- and told me their builds don’t even use that solenoid. I think they told me it might be setting the code because of my high stall. I bought HP Tuners and figured out how to set that code to not report (thanks @randeez and @Dantheman1540 ) and flashed that tune, and I just finished a long drive- it’s still shifting fine. I will have to do more testing but it looks like that code was causing the PCM to put the trans in limp mode. Wish me luck tomorrow.

That's awesome! Long live the Beast

 

[iamdub]

I’m almost afraid to jinx myself but I think I fixed my trans without touching a wrench. Many of you might know it’s been going into limp mode for the last 6 weeks or more and throwing DTC P0785 for the 3-2 downshift solenoid. I have been trying everything I could think of including replacing that solenoid and a bunch of other stuff. I have the internal wiring harness and all the internal electronics ready to install. My trans builder told me they’d like to see what happens if I disable that code- and told me their builds don’t even use that solenoid. I think they told me it might be setting the code because of my high stall. I bought HP Tuners and figured out how to set that code to not report (thanks @randeez and @Dantheman1540 ) and flashed that tune, and I just finished a long drive- it’s still shifting fine. I will have to do more testing but it looks like that code was causing the PCM to put the trans in limp mode. Wish me luck tomorrow.

You could've just had Black Bear turn off that code and saved the $600 on the MPVI and HPT credits.

 

[Tonyrodz]

You could've just had Black Bear turn off that code and saved the $600 on the MPVI and HPT credits.


View attachment 346466

Damn!! Either way, I hope you got it fixed. Good luck!

 

[Rocket Man]

You could've just had Black Bear turn off that code and saved the $600 on the MPVI and HPT credits.


View attachment 346466

Damn!! Either way, I hope you got it fixed. Good luck!

Uh-huh. And wait another 2 weeks to see if that fixed it. I asked Justin to look at my log file and tell me what was going on and he told me the PCM was commanding shifts normally, nothing to see here, it's not the problem. That took a MONTH. 2 weeks for the first log file to sit there waiting for him to look at it, and he says my tune doesn't record trans data so here's a new tune. I installed it the same day, datalogged the same day, and waited another 2 weeks for him to say the PCM isn't the problem. He told me it must be the wiring or something else. At that point I decided it was time for me to look at my own damn data. I was prepared to log and see what was going on but decided to try this first. And now I'll start tuning my vehicles myself which I've always wanted to do anyway. Self-sufficiency has always been my thing. There's a few things I still have to pay others to do but I'm narrowing the list. It's sooo worth the money for the HPT to be able to do it myself. I was about to go all cray cray on BBP. I absolutely HATE waiting.

 

[Rocket Man]

Oh, BTW....It's fixed! I drove around for about an hour this morning all over and it's still shifting fine. I even got into some road rallying with a WRX for awhile. The Beast is back!

 

[Tonyrodz]

Oh, BTW....It's fixed! I drove around for about an hour this morning all over and it's still shifting fine. I even got into some road rallying with a WRX for awhile. The Beast is back!

So who won??

 

[Rocket Man]

So who won??

He got me a couple times, I got him a couple times. I got a big thumbs up. I think he was surprised.

 

[iamdub]

Damn!! Either way, I hope you got it fixed. Good luck!

Uh-huh. And wait another 2 weeks to see if that fixed it. I asked Justin to look at my log file and tell me what was going on and he told me the PCM was commanding shifts normally, nothing to see here, it's not the problem. That took a MONTH. 2 weeks for the first log file to sit there waiting for him to look at it, and he says my tune doesn't record trans data so here's a new tune. I installed it the same day, datalogged the same day, and waited another 2 weeks for him to say the PCM isn't the problem. He told me it must be the wiring or something else. At that point I decided it was time for me to look at my own damn data. I was prepared to log and see what was going on but decided to try this first. And now I'll start tuning my vehicles myself which I've always wanted to do anyway. Self-sufficiency has always been my thing. There's a few things I still have to pay others to do but I'm narrowing the list. It's sooo worth the money for the HPT to be able to do it myself. I was about to go all cray cray on BBP. I absolutely HATE waiting.

Facetiously speaking, I was.

I feel you on waiting. That's why I chose to have mine tuned locally even though I already had the AutoCal. Hell, I'm having to spend my weekend in this Hellish heat swapping a transmission in a FWD go-cart simply because I ran out of waiting time for people to respond.