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

[BG1988]

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

Mine has a massive auxiliary muffler where the spare tire goes
(objects are bigger then they appear in the photo it's about 2.5 feet by 5feet and 6-7inches high)
I want to remove it and put a spare tire thing instead (Free up my cargo space)

plus it will have the added benefit of louden it up
apparently if you remove the Aux muffler it sounds like a black hawk helicopter while in v4 mode


if I get pulled over just shift it into M4 (always runs V8 only also only runs v8 when idle or auto stop so it will be impossible to prove anything as technically and legally I only need one muffler)

it's pretty sloppy written the law it self it clearly states it has to be in neutral when the test is done . good thing AFM does not work in neutral gear..

 

[Rocket Man]

Mine has a massive auxiliary muffler where the spare tire goes
(objects are bigger then they appear in the photo it's about 2.5 feet by 5feet and 6-7inches high)
I want to remove it and put a spare tire thing instead (Free up my cargo space)

plus it will have the added benefit of louden it up
apparently if you remove the Aux muffler it sounds like a black hawk helicopter while in v4 mode


if I get pulled over just shift it into M4 (always runs V8 only also only runs v8 when idle or auto stop so it will be impossible to prove anything as technically and legally I only need one muffler)

it's pretty sloppy written the law it self it clearly states it has to be in neutral when the test is done . good thing AFM does not work in neutral gear..

View attachment 247537

Why do the hybrids have those auxiliary mufflers? Is it because they have auto stop so they want the sound to be unnoticeable when it restarts? I want to hear it in “Blackhawk mode”.

 

[Tonyrodz]

Mine has a massive auxiliary muffler where the spare tire goes
(objects are bigger then they appear in the photo it's about 2.5 feet by 5feet and 6-7inches high)
I want to remove it and put a spare tire thing instead (Free up my cargo space)

plus it will have the added benefit of louden it up
apparently if you remove the Aux muffler it sounds like a black hawk helicopter while in v4 mode


if I get pulled over just shift it into M4 (always runs V8 only also only runs v8 when idle or auto stop so it will be impossible to prove anything as technically and legally I only need one muffler)

it's pretty sloppy written the law it self it clearly states it has to be in neutral when the test is done . good thing AFM does not work in neutral gear..

View attachment 247537

Why do the hybrids have those auxiliary mufflers? Is it because they have auto stop so they want the sound to be unnoticeable when it restarts? I want to hear it in “Blackhawk mode”.

I think he needs to post a vid clip of it. "Blackhawk Mode".

 

[Geoffsfas10]

nope, I just found one that fit, I take it you don't have bucket of nuts-n-bolts laying around?

none of mine fit !!

 

[Geoffsfas10]

If eTrailer.com doesn't lie:
Note: GM does not supply the attaching nut required to secure the wires to the studs. These can be obtained locally. You will need (1) M6 x 1.0 nut and (1) M8 x 1.25 nut.

https://www.etrailer.com/faq-tb-0007-2007-2009-GM-Full-Size-Truck-Brake-Control.aspx

Sweet thanks!!!!! thats weird theres no nut on there even with the trailer package equipped

 

[sonic_the_hedgeh]

Fair enough. Thats the one thing that really bothers me about the interior of these trucks, the visors are flimsy and cheap feeling. The NBS ones are so much nicer and more quality feeling. Speaking of the LEDs, those are the only interior lights i havent changed yet

I changed my low beams no flicker. Changed my backup lights and brake lights to led. No problems. Just when you do turn signals you need a load equalizer for those.

Sent from my CLT-L04 using Tapatalk

 

[Kee Fuller]

Installed the gruven heater Tee connectors yesterday. Getting the old tees off was easier than putting the new ones on. Not a lot of room to work with while putting on those clamps. I also didnt know you have to cut the plastic quick connectors off the heater tubes, until i saw a post months back. Gotta clean ghe engine bay sometime next week

 

[Rocket Man]

Installed the gruven heater Tee connectors. Yesterday. Getting the old tees off was easier than putting the new ones on. Not a room to work with while putting on those clamps. I also didnt know you have to cut the plastic quick connectors off the heater tubes, until i saw a post months back. Gotta clean ghe engine bay sometime next week

View attachment 247630 View attachment 247631

That’s a good part of the reason GM uses quick connects there so you can just push them on. I’ll be going with the same OEM parts that came originally. They last for 10-15 years at least, all the problems come from people using the shit Dorman parts. Just replace them as maintenance items with OEM. Glad to hear you got all those clamps on.

 

[BG1988]

I think he needs to post a vid clip of it. "Blackhawk Mode".

it's what people said it sounded like. when it's removed


it's because of Deceleration cutoff v4 mode

 

[Leo1103]

Finally finished the drop. Had the front drivers side apart twice since I sheared the strut mount bolt the first go around.