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

RooTBeeRthe1st

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Finally put the lubelocker gasket on the 14bolt to replace the new and failed felpro I had on there.
Topped it off with amsoil.
No puddles under it this morning.

Needs a wash and check the oil level before I put a few hundred miles on it this weekend.
 

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Drwinlied

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Installed cabin air filter kit yes I needed it simple procedure.
This reminds me I need to help my stepdaughter replace hers in her mazda3. Fcker reeks and has since we bought it (very used )
 

Doubeleive

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Why do aftermarket header/bolts loosen but not factory?

Things that make you go hmmm
Because they have a smaller bolt head surface area so less contact to keep it in place, less metal coverage overall so more prone to heat/cold expansion, they make locking ones I have seen them or pictures of them anyway
 
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Because they have a smaller bolt head surface area so less contact to keep it in place, less metal coverage overall so more prone to heat/cold expansion, they make locking ones I have seen them or pictures of them anyway
I've used locking ones before with aftermarket headers, just didn't know why OE bolts didn't loosen. Them having bigger heads make sense.

I installed Stage8 one's that have a tab then a C clip that holds the tab into position, but they're really a pain in the ass and hope you don't lose the C clip.

I then switched to some Breslin Split Locks which I like and are easier. The threaded part is split and there is a set screw in the center of the head that spreads the split part slightly after installing. I think the patent is expired now and other brands make them, like Summit, Mr Gasket, and Percy's.
 
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Planning on changing out the front and rear differential fluid. Manual says they both take synthetic 75w90 gear oil. Says nothing about limited slip modifier so I was going to get the Mobil Delvac with no additive.

Also doesn't give me a capacity and researching online I've found 2.75qts rear and 1.8qts front. Is this about right, even for the Denali with AWD? I was going to buy 5qts. Will that be enough or way too much?
 

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