What 4.3's swap
 

Well I have a 2001 s10 4.3/4l60e extended cab zq8... My question is what newer year 4.3's will swap into the truck with no problem? I missed out on a good deal on a 12k mile 2009 4.3 because I couldnt find out any info... Thanks

your probably going to want to try asking a wrecking yard or an S-10 forum.

I am not sure what changes between engine codes. I don't see why the basic long block wouldn't swap over from a newer year but I don't know what changes were made.

This is about all I could find...

ASTRO 96-05
BLAZER S10/JIMMY S15 96-05 (6-262, 4.3L)
BRAVADA 96-01
CHEVROLET 1500 PICKUP 96-98 6-262 (4.3L)
CHEVROLET VAN 03-07 (6-262, 4.3L)
CHEVROLET VAN 96 Express, 6-262 (4.3L)
CHEVROLET VAN 97-02 6-262 (4.3L)
ENVOY 98-00 (4.3L)
GMC 1500 PICKUP 96-98 6-262 (4.3L)
GMC VAN 03-07 (6-262, 4.3L)
GMC VAN 96 Savana, 6-262 (4.3L)
GMC VAN 97-02 6-262 (4.3L)
ISUZU HOMBRE 97-00 (4.3L, 6 cyl)
S10/S15/SONOMA 96-04 (6-262, 4.3L)
SAFARI (GMC) 96-05
SIERRA 1500 PICKUP 99-06 (4.3L)
SILVERADO 1500 PICKUP 99-06 (4.3L)

any 4.3 and you are good to go. Just your oil pan and exhaust manifolds everything else is identical 96 up.