The lq4 and lq9 are gen. It seems for many people that the scariest part of the modern engine swap is the wiring harness.
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Lq4 wiring diagram. Youll need extra fusesrelays for the fuel pump and electric fans. This matco brand wire crimper pn tct1028 is a. Chris demartini registered. Drive by wire to cable throttle conversion use 03 harnesspcm to go back to cable throttle control. The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights. Discussion starter 1 apr 7 2009.
The lq4 served in anything from bread vans and boats to suvs between 1999 and 07. Intro to the lq4 and lq9 engines. I have all the wiring diagrams on there somewhere mine was from a 2002 but i think it should. The lq4 mounts the ecu up front. Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses. Also can use.
My lq9 harness did not have enough wire length to reach the upper inside of the passenger fender. Iron heads small cam and the old sbc crank rear flange thickness. 4l60e switches pc sol tft. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. When you are doing a build with the ls family of gm engines the idea is to end up with a. Tach wiring for 99 vortecls1 tach not working on youre vortecls1 engine answer may be here.
It started off life like any normal truck engine. The wire in painless performance kits runs a little larger than the standard. I mounted mine on the firewall passenger side. To get it working youll need a gm signal stalk. Joined sep 2 2000 8897 posts. 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.
4l60e soleonids stop sw. Pcm programming wire harness info active fuel management delete visit my facebook page for a lot of new pictures harness guides youtube channel for how to videos e mail. Iii 60l iron block truck engines. Jump to latest follow 1 12 of 12 posts. I just picked up an lq4 from a 2001 yukon denali. Modifying a factory lq4 wiring harness.
4l80e solenoids stop switch. This one is for the alternator and studying the wiring diagram we found that it was located on the red c2 pcm connector in slot 15. 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. Meet the weapon of choice for big boost. Drive by wire electric throttle control info explaining drive by wire and hooking up cruise control on drive by wire setups. The wiring for dbw cc is over at the lt1 site too.
Gallery of Lq4 Wiring Diagram
