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...

PCM Reprogramming Services - PCM Programming service for your engine swap project or stock vehicle. I program all swap PCMs to remove anti-theft system that will cause a "start and die" condition. Sometimes this is referred to as VATS. I enable cooling fans for all swap applications, and change fan on and off temperatures.

Everything to know about using your Gen3 PCM to control A/C on your 99-07 Gen3 LS Engine Swap. Drive By Wire - Electric Throttle Control - Info explaining Drive By Wire and hooking up Cruise Control on Drive By Wire setups.

Here is some information for LT1, LS1, Vortec 4.8, 5.3, 6.0 wiring harnesses. There should be enough here to get you going in the right direction. Some of these I have pictures of completed harnesses I have modified for easy installation.

installed connectors to be able to seperate the 1998 from the Gen3 LS. Connectors for Cruise, Starter, and main harnesses and two pin factory 05 fans using a 1998 6.5L Diesel gas pedal.

These are the RED & BLUE PCM connector pinouts that will cover 1999 to 2002 4.8/5.3/6.0. Your harness MAY NOT have a pin in a location I have listed having a wire.

If you have a 4.3L, 4.8L, 5.3L, 6.0L, 6.2L out of a 2007-20013 Pickup or SUV, I can now reprogram this for your engine swap project. This programming is for swapping STOCK engine/trans into an older vehicle and is meant for stand …

This page will develop over time, just going to get some info up for now and rearrange and add as I go. PDF Files below contain pinouts for the ECM and Fuseblock connector, with highlights and notes on as much as I could.

I then would like to put the stock PCM and harness on the engine and install the 4L60E I have so I can drive my pickup more with the benefits of overdrive. So I'll probably end up at first putting the Megasquirt control in first, with the TH400, then later put the stock PCM and harness in and swap out transmissions.

Also, a tip on finding these. Any 4.3L V6 Pickup or S10-S10 Blazer/Jimmy will have the above computer, and can be programmed for the V8 Gen 3 LS engine. Okay. So there are some numbers to go off of. one final check to see if your PCM can support it, if its not listed here. Remove the cover of the PCM (4 torx screws).