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5.3 engine life

137K views 179 replies 99 participants last post by  MH624 
#1 ·
Hi Guys
Im wondering how long my little 5.3 L engine will last, 103000 miles now on my 2002 LS, Hypertech and new pipe and muffler, pulls the RV much better, I do all the maintenance reqiured and drive it easy.
Im considering a Duramax around 2005 model year, looks like they will go much longer than a gas engine.
Anyway how are your 5.3 L engines doing and how many miles do you have on them now?
Thanks Ron
 
#2 ·
My parents have a 2006 Yukon with the 5.3, 180k miles, and it honestly runs like new. They have replaced plugs, air filters, and oil.... that's it. That is the whole reason I got my truck with the 5.3, I drive over 25k miles a year and needed a truck that would reach 200k miles without skipping a beat!
 
#7 ·
I cannot wait to see how far mine will go. This is my second 5.3l, but I traded the first (an Avalanche) waaay to soon.
 
#10 ·
I know these aren't 5.3L engines, but you get the idea that GM knows what they're doing:

My last truck had the 5.7, with about 300K miles
A friend of mine has the 5.7, with about 250K miles
I've got the 6.0, and it has 125K miles... runs like new.
 
#11 ·
The engine in my Trailblazer is untouched since it left the factory. Maintenance is done as per the owner's manual. I use regular petroleum oil in it, buy it when it is on sale for $12.99 for a 5L jug, and change it every 6000 miles. It just keeps running fine, just like when it was new. Gas mileage is the same as when it was new as well. Don't ask me how!
 
#12 ·
The 5.3 is a great engine. She will run for miles and miles if you take care of her. I have had 3 trucks with the 5.3 prior to my current one. A 1999 z71 I got brand new put 98,xxx miles on it in 2 years and it was still running like new when I traded. A 2004 purchased used in 2005 had 125,xxx when I got rid of it. Another 1999 z71 I got in June 2008. It had 240,xxx miles when I traded it for my current truck. I bought my current 2008 used on 4/26/11 with 68,xxx miles and it rolled 94,400 today. She is running just as strong as my friends brand new 2012 5.3
 
#14 ·
Yup, whole different animal. Inline 6 cyl. GREAT engine, but not applicable here. ;)
 
#20 ·
When I got rid of my 1998 Sierra, it had 355,000 miles on it. My uncle actually bought it and uses it for farm work with the original transmission and engine still running fine. Not sure of the miles now but I woul imagine it's 500,000 or better.

My dad's 1998 Sierra had 275,000 when he sold it. Also over 300,000 on 1991 S10 blazer and it's still running.
 
#23 ·
Three words... a LONG time. Just make sure to keep up with maintenance.
 
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