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

[George B]

Ordered a negative battery cable from these guys.

Battery Cables - Custom Made Battery Cables

www.batterycablesusa.com

Got one made from 33” of 2GA with the ends on it already for 20 bucks. The small ground cable to the frame by the bumper is smashed and corroded so I plan to put an end on the old battery cable and run it from the block to the frame.

 

[cmatt]

Nice work. Looks pretty good in there.

It wasn’t too bad. Still a bit more sludge than I’d like. About 1/8 inch layer in the bottom of the pan. Maybe that’s normal at 150k. It’s been through four oil changes since I’ve had it. Each time I’ve substituted 1/2 quart of ATF in an attempt to provide some extra cleaning action since I don’t know the complete vehicle history. It has helped quiet down a noisy lifter.



Got it cleaned up and a new gasket riveted to the pan.

 

[cmatt]

i do not envy you on that one..there is ALOT of issh in the way of that pan

I wholeheartedly agree with this statement. Especially that pesky front axle.

 

[cmatt]

Oh and a 1/8 x 5/8 aluminum rivet works perfectly for the oil pan gasket.

 

[gooffeyguy]

Oh and a 1/8 x 5/8 aluminum rivet works perfectly for the oil pan gasket.

View attachment 359013

The gasket gets riveted on? In how many places?

Guess when changing out/replacing the pan gasket you have to drill out the rivets holding the previous one on there?

 

[Rocket Man]

The gasket gets riveted on? In how many places?

Guess when changing out/replacing the pan gasket you have to drill out the rivets holding the previous one on there?

Yes. 2 rivets iirc. It’s just to hold the gasket in place while you maneuver the pan into place. It’s a great idea IMO.

 

[gooffeyguy]

Yes. 2 rivets iirc. It’s just to hold the gasket in place while you maneuver the pan into place. It’s a great idea IMO.

I've seen better oil pan gasket install retention systems that don't require a rivet gun or drill to r/r

 

[cmatt]

Per the service manual, the rivets aren’t required to be replaced. But I’m OCD. It allowed me to get it perfectly centered and the gasket didn’t budge at all during installation which was nice. My guess is that, at the factory, the oil pan is prob put on with the engine upside down. So the gasket needs to be held securely to allow for higher production rates.

I’ve seen folks use zip ties which seem effective.

 

[Rocket Man]

I've seen better oil pan gasket install retention systems that don't require a rivet gun or drill to r/r

I mean, 2 pop rivets is pretty damn easy and effective. You don’t even need to use the rivets if you don’t want to. Gravity works every time I’ve tested it.

 

[Just Fishing]

I went with the no rivets on the oil pan install, wasn't hard to keep centered.
I also for some reason felt like the rivets could get in the way, but I'm sure it's away from the sealing surface anyways.