+ Reply to Thread
Results 1 to 10 of 21

Thread: What'd I get myself Into?! LS1 Into 4.3 Sierra

Hybrid View

  1. #1
    Dude just buy the harness off E-bay they all over there for about $120 and depending on what yr engine you use might have change INJ plugs and maybe a few other things.

  2. #2
    Join Date
    May 2009
    Location
    hot & windy
    Posts
    1,117
    v8 swaps in the 99NBSs are a little goofier than the rest of the NBSs. read all the way through the stickies (yes, they apply to LS1s as well), and read my build thread. mine's a 99 with an 01 5.3 swap.


    ps - the 03s had the same clutch fan & 28" radiator that the older ones used. the swap for half-tons was in 05
    00 FRC - just top end, exhaust, and a hot-air intake
    99 Sierra - 5.3 / 5spd
    ↓ click the pic for the build ↓

+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts