L92 in 07 Denali is toast is L92 only option

[Actifenpleinair]

Marky, answering your questions.

Having just put $5.6K in to a tranny I was hoping for another 185K given I recently (7k ago) did the tranny.

I said "Junk it" in the context of, if I had not just done the transmission, it would have been coming due for replacement and ethically I would not have felt right about selling it to someone who wants to rebuild the engine hoping to have a reliable truck. Junking in that scenario existed would have been selling it to a pick-n-pull or similar part salvage yard

I could still go that route but now I would pull the tranny first. And look for a similar truck at the 185k transmission interval and swap mine into it.

My truck has 310k on it and was running great until today when a heater core hose went, the temp shot up and after I pulled over, short circuited the heater core, filled with water and went to start it was clear something bigger had gone wrong and then it seized.

I am looking at options, which is why I asked the engine question. What would be the advantage in putting a 6.0 instead of another 6.2? Given California Smog laws would I not be inviting problems?

Hey Tahoe-Denali, my failure was scarily similar. '07 Yukon denali, solid rebuilt tranny, I was hammering up LCC to Snowbird when engine power dropped, I downshifted and couldn't keep revs up. Then I saw the steam. Turns out the engine has gone into protective mode, after a heater core tee broke off and emptied my motor of coolant. I reconnected a shortened hose, added cold water to upper radiator hose, made a hell of a racket as it hit the hot aluminum popped and flashed into steam. I used a little bit more water into it, maybe a gallon total, tried to restart to get to a safe spot. Spinny spinny, then a clunk every revolution, and then a final clunk. Looks to be locked up.
I found a caddy '07 L92 with 115k miles for $2300. Starting the swap today.
What have you done with yours? Did you find out what broke?
Lou

 

[Joseph Garcia]

Hey Tahoe-Denali, my failure was scarily similar. '07 Yukon denali, solid rebuilt tranny, I was hammering up LCC to Snowbird when engine power dropped, I downshifted and couldn't keep revs up. Then I saw the steam. Turns out the engine has gone into protective mode, after a heater core tee broke off and emptied my motor of coolant. I reconnected a shortened hose, added cold water to upper radiator hose, made a hell of a racket as it hit the hot aluminum popped and flashed into steam. I used a little bit more water into it, maybe a gallon total, tried to restart to get to a safe spot. Spinny spinny, then a clunk every revolution, and then a final clunk. Looks to be locked up.
I found a caddy '07 L92 with 115k miles for $2300. Starting the swap today.
What have you done with yours? Did you find out what broke?
Lou

Tough lesson to learn the hard way. But, I'm really glad that you found a replacement L92, as they are a fantastic motor. Smiles per mile all the way!