gonejesus

I have a 2007 classic Silverado(nbs cateye) swapped the 4.3 v6 to a 5.3 from a 2001 Tahoe, can’t get it to start, key in ignition, no crank no spark, anti theft light on, v6 fuse box. Where should I start ?

G Atsma

Check EVERY connection and EVERY GROUND.
Grounds are extremely important and sensitive in any LS installation.

gonejesus

Found the fuse boxes are different, the engine wiring harness connector that goes to it is different gonna look for a fuse box that fits if I can’t find one I could possibly rewire the connectors? Idk I’m really lost in this situation, if I can’t figure this out I’ll put my v6 back in