Chevy vortec engine wiring harness - info psi specializes in the design and manufacture of standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions here is some helpful information if you want to modify your stock truck wiring harness your self 1999 2007 this junction block is part of the main engine harness info psi specializes in the design and manufacture of standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions i got a few little extras miscellaneous parts that will be needed to do this based on input from brendan ok so the next step was to tear the split loom off the harness and then tear all of the electrical tape off of it to see what i am up against and what i have to work with built as the official current performance wiring shop truck this truck has an ls1 4l60e swap 5 3l lm4 engine transmission pull out 5 3l lm4 aluminum block engine 2004 chevy trailblazer.

2wd 4l60e auto trans engine pull out includes the following engine wiring harness p div class b factrow b twofr div class b vlist2col ul li div price 3 000 00 div li ul ul li div availability in stock div li ul div div div li website filled with info for swaping the popular gm lt1 ls1 vortec truck 4 8 5 3 6 0 engine and others into about anything pcm programming wiring harness help span class news dt jul 25 2013 span nbsp 0183 32 probably have to change the knock sensors under the manifold i had to do the same thing with my 05 very problamatic on the nbs trucks there are tons of how tos on this site and utube and if i remember right will cost you around 130 or so with the new wiring harness that you should replace and take around 3 4 hours at the most with basic handtools span class news dt sep 16 2013 span nbsp 0183 32 i am thinking about swaping my 4 8 vortec to a 6 0 vortec.

the swap will be into a 1999 single cab silverado 2wd short box i was wondering if anybody else has done this swap how hard would it