The wire in painless performance kits runs a little larger than the standard. Modifying a factory lq4 wiring harness.
1999 2003 Ls Vortec 4 8 5 3 6 0 Truck Engine Standalone
Lq4 wiring harness diagram. Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses. I have all the wiring diagrams on there somewhere mine was from a 2002 but i think it should. This includes the lt1 ls1 ls2 ls3 ls7 l99 l76 l77 l92 l98 lm7 lm4 lsa ls9 l83 and the new gen v lt1. Joined sep 2 2000 8897 posts. Lq4 wire harness the lq4 vin u 6000 engine is an awesome gm power plant similarly related by looks to the 48 lr4 53 lm7 but is massively in a class of it own. This engine is the foundation for a stroker motor and when you need more room the lq4 engine is the suburban of the ls blocks.
The lq4 mounts the ecu up front. Youll be able to build yourself a custom sized wiring harness for under a 100. The best advice i can give is to do things in. Youll need extra fusesrelays for the fuel pump and electric fans. My lq9 harness did not have enough wire length to reach the upper inside of the passenger fender. It seems for many people that the scariest part of the modern engine swap is the wiring harness.
We also specialize in ls and lt swap standalone harnesses. All psi harnesses are made in the usa. These harnesses include the gen ii lt1lt4 gen iii 24x ls1ls6 and vortec truck engines as well as gen iv 58x ls2 ls3 ls7 vortec and gen v lt ecotec3 engines. Psi sells standalone wiring harnesses for gm gen ii iii iv v lslt based engines and transmissions. Drive by wire electric throttle control info explaining drive by wire and hooking up cruise control on drive by wire setups. The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights.
It is really that simple with the factory fit harnesses from bp automotive. Info for 2004 chevy express van harness by request express van 60 wiring harness info. When you are doing a build with the ls family of gm engines the idea is to end up with a. Jump to latest follow 1 12 of 12 posts. The wiring for dbw cc is over at the lt1 site too. Tach wiring for 99 vortecls1 tach not working on youre vortecls1 engine answer may be here.
To get it working youll need a gm signal stalk. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. Discussion starter 1 apr 7 2009. I mounted mine on the firewall passenger side. I just picked up an lq4 from a 2001 yukon denali. Chris demartini registered.
We were able to snap a cheap wiring harness from a ls truck engine and combine it with a few off the shelf parts. Re wiring a stock gm truck wiring harness is intimidating if you are new to this kind of thing but it is relatively simple if you follow some steps.
Gallery of Lq4 Wiring Harness Diagram
