Norm

Do a search here for 4200 - lot of info

nutshell

engine & trans >> trailblazer/envoy 2003 to 2009 - stay away from the 2002 unless its free.
Harness + pcm fix >>> lime-swap.com
rear sump oil pan fab or emtech motorsport
Home brew engine brackets

also vortec4200.com

Last edited by efi-diy; 08/01/12 03:48 AM.
51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them