I have a '97 Blazer LT 4x4 with the 4.3L with 240,000 miles. I discovered today that the intake is leaking coolant down the engine block. They gave me a quote of about $500 to replace the intake gasket parts and labor. I was thinking it'd be a little more practical to just drop a younger 4.3 in seeing this one has 240K miles already. I was wondering

 

I was wondering which makes, models, and years of GM vehicles would have engines compatible with mine?

 

your pretty much stuck with Blazer , Jimmy ,s10 ,Astro and 1/2 ton P/U

If you google engine code
it should give you the knowledge to match from vin #

http://www.angelfire.com/ca/TORONTO/VIN/chevrolet.html

 

I have a 99 S10 Blazer that spun a rod bearing. I had a 4.3 out of 2006 Silverado installed.

The ONLY difference was the knock sensor BOSS (hole). The 2006 knock sensor boss must be tapped to accept the 1999 knock sensor threads.

Absolutely no other issues and or problems.

 

Wow a 2006 in a 99 that's the first time I ever heard of that compatibility as many times as this subject has been discussed.You didn't have to change the pcm?All the other info I have read says only up to 2000 would work with some minor mods and pcm change.

 

I used a 2006 long block (heads+short block) only. No need to swap PCMs whatsoever.

I simply had my intake and fuel injection setup installed on the 2006 long block. No biggie.

Like I stated before, only the knock sensor boss needed to be tapped out. Again, no big deal.

 

Heck, its only about $35 for a intake gasket kit.(without valve cover gaskets) id much rather spend a few hours changing a gasket than the whole weekend (or more) changing a entire engine....and on that note, i changed a engine on a '96 and shortly afterwards needed a intake gasket due to a coolant leak-go figure!

 

Were you able to use the new style fuel injectors or not?

 

We simply reused all the 99's FI and Intake setup on top of the 2006's long block. Nothing else.