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

[Hi-psi]

Take car of the car with recommended oil changes, using the recommended oil, and you should be fine.

This, this, THIS. LOL

I think one of the big culprits with the whole OMG, AFM is the Devil! thing is the oil. The quality and the frequency of change. The oil life monitor in the DIC was/is designed to calculate the oil life using the factory weight and quality oil, as well as the factory filter. So, when you have someone that then uses a different weight, uses conventional or syn-blend, cheap brand, and/or extends their oil change intervals, then that's where/when you start having issues with the AFM lifters.

When I bought my Denali, I knew that since I would be buying it 2nd hand, I wouldn't know what kind of oil had been run in it for it's life, or how frequently it had been changed, so I specifically avoided the AFM years for the 6.2 in my search.

 

[Sam Harris]

It isn't pretty, but it works. Like I said, I didn't get the adjustment exactly like I would have preferred due to being in a rush because of a rain shower. The more I think about it, I'm not even sure I'll spend the time/money to paint or coat it since that doesn't impact the functionality. Isn't like anyone looks under the hood or I'm taking this thing to car shows. LOL As previously mentioned, it's definitely louder than the stock setup, not in a bad way though, and certainly seems in the 30 or so miles I've driven it so far that it takes a bit less pedal to moderately accelerate and cruise. More crisp/responsive throttle. I've got a full week of work commuting ahead and then a 800 mile round trip road trip this coming weekend, so I'll be able to tell soon what impact (if any) it has on fuel mileage in both scenarios.

Planning to still stay on the lookout for a smoking deal on an Airaid tube, but for now this works just fine.


View attachment 217319

Running stock, or upgraded/ high flow filter? Looks like a stock filter box, no additional holes, etc..?


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[Hi-psi]

Running stock, or upgraded/ high flow filter? Looks like a stock filter box, no additional holes, etc..?

Stock airbox, stock style filter (Purolator I think from Advance Auto), stock inner fender (no cutting to open it up).

Only thing I changed was the tube from the throttle body to the MAF sensor.

It definitely made a difference. Not like, let's go hunting Corvettes now, LOL, but a noticeable difference.

There's a small hill on the road I work off of that I hit about a 1/16th of a mile after pulling out of the parking lot. Typically I hit it going about 45-50, and if I don't give the throttle a little blip to force a downshift, by the time I crest the hill the grade has dragged the vehicle down to about 40 mph. Today when I headed out for lunch, same as always, hit the hill about 45-50, maintained that speed climbing the hill with no downshift required. Of course that isn't a back to back dyno charts definitive comparison, but the more I drive it after doing the tube, the more I notice that it did make an impact.

 

[Sam Harris]

Stock airbox, stock style filter (Purolator I think from Advance Auto), stock inner fender (no cutting to open it up).

Only thing I changed was the tube from the throttle body to the MAF sensor.

It definitely made a difference. Not like, let's go hunting Corvettes now, LOL, but a noticeable difference.

There's a small hill on the road I work off of that I hit about a 1/16th of a mile after pulling out of the parking lot. Typically I hit it going about 45-50, and if I don't give the throttle a little blip to force a downshift, by the time I crest the hill the grade has dragged the vehicle down to about 40 mph. Today when I headed out for lunch, same as always, hit the hill about 45-50, maintained that speed climbing the hill with no downshift required. Of course that isn't a back to back dyno charts definitive comparison, but the more I drive it after doing the tube, the more I notice that it did make an impact.

Very nice. Thanks for the update. I think I’ll have to try this out, until I can get a deal on my Airraid.. [emoji16] I’m ASSuming the 3” will work for NBS as well as NNBS.


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[Fosscore]

Went to Lone Star Throwdown. Played around in the mud... very nearly got stuck. The lifted monstrosities were scared to touch the stuff lol. Good timesView attachment 217366

Holy Mudboggin'!! Looks like some fun...gonna be a MF to clean.

 

[Mickey_7106]

Haven't done it yet, but for $15 I'll give these a try since my passenger light went out

 

[Hi-psi]

Very nice. Thanks for the update. I think I’ll have to try this out, until I can get a deal on my Airraid.. [emoji16] I’m ASSuming the 3” will work for NBS as well as NNBS.

Yeah, I see no reason why it wouldn't. There may be small differences in the length and arrangement.

For my '08 Denali it was:

Two 4in sections of 3in pipe (to join the elbows)
One 45 degree street elbow (connects to MAF)
One 60 degree regular elbow
One 90 degree street elbow (connects to throttle body)
Two 3in Fernco's w/clamps
One 3/8 barbed 90 degree threaded fitting
One foot of rubber 3/8 ID tubing


If I were going to build another one, I might try using a 60 degree street elbow in place of the 90 to connect to the throttle body. At least on my vehicle it kind of curls back a bit inside of the Fernco boot, making a not so smooth transition. The 90 degrees was a little too much. I think 60 would have been more ideal.

I drilled and tapped the barbed fitting into the backside of the 60 that connects to the line down near the top of the passenger side valve cover. Where the fitting goes into the 60, I used some liquid electrical tape to ensure I had an airtight seal. All of the unions are just glued with regular PVC cement.

 

[14rcsbOH]

Went to Lone Star Throwdown. Played around in the mud... very nearly got stuck. The lifted monstrosities were scared to touch the stuff lol. Good timesView attachment 217366

Did you see freddy?

 

[lowh07]

Holy Mudboggin'!! Looks like some fun...gonna be a MF to clean.

Hosed off the chunky stuff a few hours later before it had a chance to dry on there. Fully cleaned the next day. All good now

Did you see freddy?

Freddy?

 

[07Burb]

Hosed off the chunky stuff a few hours later before it had a chance to dry on there. Fully cleaned the next day. All good now



Freddy?

don't even act like you know who freddy is. sheesh.