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

[NoReverseYukon]

Gonna tackle the water pump tomorrow. Thinking about draining the block at the same time.

What can I expect difficulty-wise in getting them out? And Haynes says there are 2 while some DIYers claim 4. The engine has 330K with unknown service history. Will I find a lot of sediment?

Should I bother, or not?

Thanks.

 

[BaMaDuDe87]

Okay maybe not the right thread, but app is everyone using for OBD readers for iOS?


Sent from my iPhone using Tapatalk

 

[wjburken]

Okay maybe not the right thread, but app is everyone using for OBD readers for iOS?


Sent from my iPhone using Tapatalk

I’m using OBD Fusion

 

[Rocket Man]

Gonna tackle the water pump tomorrow. Thinking about draining the block at the same time.

What can I expect difficulty-wise in getting them out? And Haynes says there are 2 while some DIYers claim 4. The engine has 330K with unknown service history. Will I find a lot of sediment?

Should I bother, or not?

Thanks.

Depends on if you have rust or not I suppose. There’s 4 bolts. When I did mine at 150k it was super easy, no sediment just Dexcool. At 330k who knows.

 

[Fless]

Gonna tackle the water pump tomorrow. Thinking about draining the block at the same time.

What can I expect difficulty-wise in getting them out? And Haynes says there are 2 while some DIYers claim 4. The engine has 330K with unknown service history. Will I find a lot of sediment?

Should I bother, or not?

Thanks.

By "getting them out" do you mean the block drain plugs?

 

[Rocket Man]

By "getting them out" do you mean the block drain plugs?

Ah yes that’s probably it. I was just thinking water pump since he didn’t specify 4 what.

 

[NoReverseYukon]

By "getting them out" do you mean the block drain plugs?

Yes, the 17mm block plugs.

 

[Dantheman1540]

By adding that filter, wouldn't you have to change it every so often cause it'll clog up.

Yeah, I'm sure it will but it's just for temporary testing purposes. It's a glass cleanable filter like I typically put on my carburetted engines. I can run it for 1 tank of gas and inspect. If it's really bad I will add a different style mesh to the can and retest. It's very likely I'll never be able to catch all the oil just by changing mediums in the can but it's fun to test and doesn't cost anything.

 

[Fless]

Yes, the 17mm block plugs.

Cool, I wasn't clear on that. Haynes says one on each side of the block, and you may need to use a poker of some sort (book says Phillips screwdriver) to break a possible crust once you get the plug out. I think doing at least one of them would be worth it if they come out easily enough.

 

[Rocket Man]

Yes, the 17mm block plugs.

Alldatadiy also concurs, 1 block plug on either side. It says to remove the block heater if you have one too ( my Denali has one).