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

[RobsFreeland]

Today I made sure oil filter was on, bolts on pan torqued.
Put on timing cover, harmonic bal, air con belt, lifters and their trays.
Replaced knock sensors and reinstalled valley cover. Headstomorrow for push rods measure. Before and after pics.

 

[Rocket Man]

Today I made sure oil filter was on, bolts on pan torqued.
Put on timing cover, harmonic bal, air con belt, lifters and their trays.
Replaced knock sensors and reinstalled valley cover. Headstomorrow for push rods measure. Before and after pics.

View attachment 266583 View attachment 266584

Why did you pull the heads?

 

[RobsFreeland]

New cam,springs and I’ll upgrade the trunnions.

 

[RobsFreeland]

Checking the ridge in the barrel. Cleaned up the carbon. Was making a decision on whether to go all out and flat top pistons bearings etc.

 

[Sam Harris]

I know I’m doing incandescent because on an 02 the circuits are a mess of polarities, making it confusing as f to try to solder in led bulbs. That’s why nobody does the 99-02’s. Otherwise I would have done blue leds long ago. I tried converting some extra hvac controls I had laying around and gave up, and I’m pretty good at that stuff. In 03 they changed and it’s easy to figure out.

Interesting. I didn’t realize there was such a difference. I had a few surprises with polarity on mine, but nothing difficult.

 

[Rocket Man]

New cam,springs and I’ll upgrade the trunnions.

I did both of mine -cams, dual springs, hardened pushrods, vitron valve seals- without pulling the heads. It’s not necessary unless you’re replacing the lifters. Is was especially easier to do it that way on the one that’s supercharged- no need to pull that damn blower.

 

[Rocket Man]

Interesting. I didn’t realize there was such a difference. I had a few surprises with polarity on mine, but nothing difficult.

Yeah everything electrical on the 03-06 is way different than the 99-02. Even things like the cluster are different and I have very little mod options there.

 

[Bombsquad85]

Swapped put the ****** old street shocks for some bilstein 4600s. Very happy over all. Also had to change the belts and tensioner assembly

 

[Dantheman1540]

Swapped put the ****** old street shocks for some bilstein 4600s. Very happy over all. Also had to change the belts and tensioner assembly

View attachment 266622 View attachment 266623

You lowered at all?

 

[Bombsquad85]

You lowered at all?

Yea 2/4 drop spindle kit. But I have the 1" spacer in the rear so 2/3