parrisw

I'm hunting for a aluminum block 5.3 and auto trans for a swap, due to price, sure I'd like a LS2-3, but people want a small fortune around here. What years did the aluminum 5.3 come and what vehicles? I've seen 2004, is that the only year? What vehicles am I looking for?

Thank you!

KCS

iTrader: (20)

The L33 and LC9 are the two aluminum 5.3L blocks that I'm aware of. If I'm not mistaken, the L33 is the Gen III design and the LC9 is the Gen IV design.

parrisw

Thanks. I'm wondering what years to look for.

Thanks.

1FastBrick

iTrader: (16)

There was also an LM4 5.3L for the 2003-2004 Years which would be found in SSR, Trailblazer EXT, Envoy XL, Ascender as well as the Buick Rainier.

This would also be a gen3 engine.

dewchugr

I bought one from an 06 Rainier Saturday, $250

parrisw

Thanks. :-(

dewchugr

lol, junkyard said it ran but was making noise. I'm hoping the block is good.

parrisw

Just hoping I can find one.

Modis500

2007 saw the SUVs and some trucks use the aluminum 5.3 engine... Horrendous oil usage when the rings start to go... See quite a few customers burn thru 2+quarts in under 2500 miles... Their low oil level light comes on... Only the '07s though.

parrisw

Thanks for the info.

mantleovmyg

I'm wondering what years to look for.

ussteel

iTrader: (8)

Good info

https://en.wikipedia.org/wiki/GM_small-block_engine

DietCoke

iTrader: (18)

All the hybrid trucks had the alum engine.