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

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What does the cut-out do besides make it louder? Does it add power or better mileage or something?

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

Idriveaho

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I used a rag to clean the plate and around the bore. Cleaned all around that my fingers could reach inside. I used the sea foam spray since I didn’t have tb cleaner. That alone caused the idle to change before I even sprayed the sea foam in the engine. Had the wife try to keep the engine at 2k. She never touched the pedal the idle was so off.
 

Austinite

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What does the cut-out do besides make it louder? Does it add power or better mileage or something?

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

It pretty much just makes it louder. I just like it because I can go from loud to stock at the push of a button. Like when the wife is in the truck, I have it closed, but as soon as she's gone I open it up and it's like I'm back in highschool firing up my old 56 Chevy.
 

Idriveaho

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It pretty much just makes it louder. I just like it because I can go from loud to stock at the push of a button. Like when the wife is in the truck, I have it closed, but as soon as she's gone I open it up and it's like I'm back in highschool firing up my old 56 Chevy.

One thing I miss about my Silverado is the straight pipe v8 roar. I had a glasspack on it but the weld rusted off and I never fixed it. I do like having a quiet tahoe in a way for trips with the family so they sleep, but I’m getting tempted to atleast chop off the resonator.
 

07Burb

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This weekend I installed new MSD coils to replace my stock coils with 224k on them. The burb seems to idle smoother and runs good. She wasn't running poorly before but would idle a little rough on occasion. :)

Coils.jpg


I also gave her a good once over as I usually do about every 6 months. Brakes looks good, need an upper ball joint on the passenger side, she needs new tires ASAP #facepalm Overall, she's looking to be in good shape in preparation for summer vacations and such. Hopefully will get the time to do upper ball joints before summer.
 

Idriveaho

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Got the oil changed at my local Chevy dealer. 59.95 for 6 quarts of dexos approved full synthetic and tire rotate. I do my own work but if I don’t have to get dirty and store used oil and still pay the same price I’ll take advantage of it.

The idle is still a little high but not too much. I think some more driving it will eventually figure it out.
 

R3cord303

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One thing I miss about my Silverado is the straight pipe v8 roar. I had a glasspack on it but the weld rusted off and I never fixed it. I do like having a quiet tahoe in a way for trips with the family so they sleep, but I’m getting tempted to atleast chop off the resonator.
SLP resonator delete is perfect for that! Looks very nice with the tips too.
 

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