longer then the truck if you take care of it and do the maint on it...
John

 

WAYYYY longer than the transmission if my case is any indication....

My 4.8L has 152K on it and was towing and hauling all its life and then I bought it and I beat on it every day . Has never failed to start up for me. Still runs smooth as hell too! I was driving my friends '03 Suburban and it only had like 30K on it and it barely felt "newer" if you know what I mean. These engines are phenomenal!

 

drove someone I knows 5.3 with 230,000 the other day. drove like it was new.

 

i used to service one guys truck, he didnt change the factory plugs until 280,000 miles..on 2 plugs the electrods were burnt off..this guy was hard on ****..he sold it at 350,000 miles

but mine went to heaven at 127,000 miles..got it at 106,000 but it had seen alot of street racing and over 90 bottles of nitrous

 

Anybody notice reduced life on an engine with the dreaded piston slap? Mine is quite noisy at start-up and only 100,000 on it.

 

my buddy pulled his 225k 4.8 for a 6.0 and it was still running strong when he pulled it!

 

254,000 here on my 99 5.3. Still runs like the day I got it. Fuel pump went out at 175k and trans at 203k but other than that the motor is great as far as I can tell. 120k aint nothin.

 

I want to see more info on the truck with 500k miles.

 

Yeah same here even if he got the truck in 2000 that's still over 70k miles a year. Possible but damn that's alot of miles makes my truck feel new.

 

my cousin has a 2000 tahoe with 275000 and nothing has gone wrong with it exept for the G80
mine is a 2001 and it has 102000 and its running fine as well. im just waiting on my G80 to go out at anytime !!