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

[HiHoeSilver]

What is the free travel mod? I’ve searched but can’t seem an actual thread on it...

Cutting the bump stops for the rear to give more up travel.

Here's @iamdub post if it. Nice post.

https://www.tahoeyukonforum.com/threads/growing-up-doesnt-have-to-suck.93510/page-19#post-1320078

 

[R3cord303]

Cutting the bump stops for the rear to give more up travel.

Here's @iamdub post if it. Nice post.

https://www.tahoeyukonforum.com/threads/growing-up-doesnt-have-to-suck.93510/page-19#post-1320078

OH. You guys are just running without bump stops at all? Damn.

 

[Walkercraig01]

Huh? What did you say? Can't hear a thing with that Rustmaster! LOL



Nope, GMT800s do not use CAN bus. You can remove it or set to pass-thru on main menu.

rofl it sounds similar to the avy but it actually isn't near as loud and I think it is magnaflow its a shorty tho

 

[swathdiver]

which reminds me, on my 2012 I had cleared any saved codes on my bcm so when I scan it there cleared and gone, yet when I took it to the dealer last time and they scanned it all the previous codes I had cleared out came up on there printout. I thought that was kind of weird.

Yeah, never heard of that. Wonder if they still reside in the truck somewhere or were transmitted to GM?

 

[gooffeyguy]

Nope, GMT800s do not use CAN bus. You can remove it or set to pass-thru on main menu.

So I wonder why it can't communicate when trying to get data from "Body" modules like DIC, Dash, HVAC

I've tried it both with engine off and running. It will flash the data screen real quick then say no communication, check OBD plug and ignition on/off

 

[swathdiver]

So I wonder why it can't communicate when trying to get data from "Body" modules like DIC, Dash, HVAC

I've tried it both with engine off and running. It will flash the data screen real quick then say no communication, check OBD plug and ignition on/off

I've experienced this with our 2004 Pontiac Montana, never did figure it out. Weird.

 

[gooffeyguy]

I've experienced this with our 2004 Pontiac Montana, never did figure it out. Weird.

Damn, I was hoping to try to reset the HVAC actuators. The mode dial will click constantly when turned all the way to the left (counter clockwise) to the panel vent setting. If you turn it clockwise one click it stops. No big deal, it's just annoying though.

 

[Rocket Man]

OH. You guys are just running without bump stops at all? Damn.

Did you actually read the post? Bump stops are added back in, in a different location. BTW just do a google search, the info is there too.
Edit: I didn’t read the post lol. Didn’t realize @iamdub didn’t install the pancake bump stops which is part of the free travel mod. DJM suspension has a good how-to. https://djmsuspension.com/free-travel-2/

 

[Rocket Man]

So I wonder why it can't communicate when trying to get data from "Body" modules like DIC, Dash, HVAC

I've tried it both with engine off and running. It will flash the data screen real quick then say no communication, check OBD plug and ignition on/off

You’re probably in the wrong model or menu. Also keep in mind the NBS can’t access everything the NNBS do. But most of the time you get that message, you've either selected the wrong vehicle or that module isn’t in your vehicle, like trying to access the abs module on a non abs vehicle.

 

[Doubeleive]

So I wonder why it can't communicate when trying to get data from "Body" modules like DIC, Dash, HVAC

I've tried it both with engine off and running. It will flash the data screen real quick then say no communication, check OBD plug and ignition on/off

your using the wrong vin code, it's probably like mine is on the 03 it's one digit off, I had a similar problem

 

[Doubeleive]

Yeah, never heard of that. Wonder if they still reside in the truck somewhere or were transmitted to GM?

I don't know either I just went and double checked there are no stored codes in the bcm or ecu, but when I do a full system scan the ones I know are there from my own doing show up, but there scan showed old ones I know were cleared and do not show up presently, maybe i'm not looking in the right place, maybe it has a saved place somewhere

 

[Doubeleive]

Damn, I was hoping to try to reset the HVAC actuators. The mode dial will click constantly when turned all the way to the left (counter clockwise) to the panel vent setting. If you turn it clockwise one click it stops. No big deal, it's just annoying though.

probably a bad blend door actuator my ex's 04 suburban does the exact same thing, move it one notch it stops clicking

 

[gooffeyguy]

I'm using K on that one, which is the 5th digit. I also tried E which is the 4th, but that only showed the supplimental airbag restraint (or something like that) available. I've actually tried all production codes available on the screen.

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[Doubeleive]

I'm using K on that one, which is the 5th digit. I also tried E which is the 4th, but that only showed the supplimental airbag restraint (or something like that) available. I've actually tried all production codes available on the screen.

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

are you using ld trk,mpv,incomplete? mine came up under both c & k after choosing either code it gives me a choice of auto dual zone or manual dual zone, then you proceed to body after that then select hvac

 

[gooffeyguy]

probably a bad blend door actuator my ex's 04 suburban does the exact same thing, move it one notch it stops clicking

Yeah, it's the mode door actuator though which is in the dash behind the radio and hvac controls. I don't plan on digging into it to get to it and was hoping just an actuator relearn would take care of it.

It doesn't have Auto hvac controls or a fancy stereo, but does have like 6 speakers and the sub

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

 

[iamdub]

OH. You guys are just running without bump stops at all? Damn.

I don't believe I'll ever be in a situation where the suspension is compressed enough for the axle to contact the frame. The suspension won't be articulated on a trail nor do I do any heavy hauling. I won't be hucking my Tahoe off any ramps, dunes or whoops, either. Once it's lowered, I'll reassess the axle-to-frame clearance and will likely install thin poly bump stops just so there's no chance of metal-on-metal contact. Also, I have load bags that will be in the coils when it's lowered, so it'll never sag if loaded in the cargo hold or on the hitch.

 

[Doubeleive]

Yeah, it's the mode door actuator though which is in the dash behind the radio and hvac controls. I don't plan on digging into it to get to it and was hoping just an actuator relearn would take care of it.

It doesn't have Auto hvac controls or a fancy stereo, but does have like 6 speakers and the sub

2001 Yukon SLT
2012 Yukon Denali XL
2011 Yukon Denali RIP 5/20/18

if you cant figure it out try the next year up 2002 should be essentially the same for 00-02, these things for the most part use the same system with slight variances
you could even try 03 and just choose manual hvac
be sure you are choosing the correct radio if it ask's also

 

[avalonandl]

Dashskin is on and curing. Some observations- fits well except along the windshield. It has a lip that does not well at the front. If i had the right tools I would have trimmed it off. The driver side by the defroster vent, had to tape it down. Going to let it cure overnite. Put a moving blanket and weights, brick water bottles, etc.

 

[avalonandl]

My tires are 27th week of 2015. Probably got another 20k miles. Bridgestone Duelers Allenza. Same as OEM, 22".

 

[esoteric_ast]

Looks great! Surprising on the bump stops, mine was basically resting on them before cutting. I’m back up to 3” and free travel model and no more hitting.

I do have the ZW7 - PREMIUM RIDE SUSPENSION with Nivomat shocks. That may make a difference. These are the self leveling type.