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

[CHOO CHOO]

Engines are plentiful and therefore relatively cheap. Source you one and reseal it and maybe even AFM delete it while it's out. The LS platform is easy to work on once you know a few key points so it makes a great "learner". Being intimately knowledgeable of the engine will be really handy for any future servicing. Consider yourself fortunate to have a decent head notice instead of suddenly having a blown motor and in a bind to jump on the first replacement you come across.

Did they specify why would it be losing compression? Maybe the valves are just cruddy and not sealing so set of refurb'ed heads would fix it. Like the others said- get a second or third opinion.

He said the seals are going bad most likely.

I think I might have my neighbor check it out. Being that I see him work on people's cars constantly and watching him build a old mustang from the ground up and his old hot rod, I'm sure he would be able to test the compression. And, I know I can pay him and trust him to put in an engine if I decide to get a new engine.

After having some time to think about it, I definitely will keep it and use it as a learning vehicle.

 

[avalonandl]

At 50% compression it has to be a valve seat or rings. Or a valve is not fully closing.

 

[the_tool_man]

He said the seals are going bad most likely.

I think I might have my neighbor check it out. Being that I see him work on people's cars constantly and watching him build a old mustang from the ground up and his old hot rod, I'm sure he would be able to test the compression. And, I know I can pay him and trust him to put in an engine if I decide to get a new engine.

After having some time to think about it, I definitely will keep it and use it as a learning vehicle.

I'm wondering if you've just got a stuck ring? If it's not a DD, you could let the offending cylinder soak with Seafoam or penetrating oil for a few days. Then drive the hound out of it and see what happens.

 

[CrashTestDummy]

He said the seals are going bad most likely.

I think I might have my neighbor check it out. Being that I see him work on people's cars constantly and watching him build a old mustang from the ground up and his old hot rod, I'm sure he would be able to test the compression. And, I know I can pay him and trust him to put in an engine if I decide to get a new engine.

After having some time to think about it, I definitely will keep it and use it as a learning vehicle.

'Seals' are not the problem. I find it odd that ALL the cylinders are at 50%. Definitely get another opinion.

 

[HiHoeSilver]

'Seals' are not the problem. I find it odd that ALL the cylinders are at 50%. Definitely get another opinion.

He said it's only #1.

 

[89Suburban]

@89Suburban, here you go.

Sent from my HD1905 using Tapatalk

Thank you so much sir.

 

[Idriveaho]

I didn't do it. Beyond my level of polishing... After this it gets ceramic coating.

View attachment 233387 View attachment 233388
View attachment 233389

mine needs this done badly.

 

[esoteric_ast]

Found out why so many people drive around in Tahoe’s with one DRL out. **** the accountant that designed this headlight setup. Threw my beer in the woods and walked away before I fire bombed my own truck.

 

[Sam Harris]

Found out why so many people drive around in Tahoe’s with one DRL out. **** the accountant that designed this headlight setup. Threw my beer in the woods and walked away before I fire bombed my own truck.

This is why LED’s... Those were the first replacement bulbs I bought for my Yukon. About 5 hours after I bought it. Then swapped all external bulbs to LED’s

 

[PPV12HOE]

This is why LED’s... Those were the first replacement bulbs I bought for my Yukon. About 5 hours after I bought it. Then swapped all external bulbs to LED’s

I did the same... replaced everything with LED's...