Document Downloads


Due to unauthorized use of our download section, only Larry's Electric customers will have access to the ECM/PCM Pin out charts section.  Please call for a user account if you do not have one.

Installation instructions are still available without a user account.

You will need a pdf reader to view instructions & pin charts.  If you do not have one you can get on free from the link below.


TPI Harness installation instructions

TBI Harness Installation Instructions

LT1 Harness Installation instructions

               700 R4 lock up kit instructions

LS1 Harness Installation instructions

Fan relay, Brake switch, and SES light diagram

Universal Chassis harness instructions

12 fuse panel installation instructions

1993 LT1 Harness Installation Instructions

00-05 Vortec V6 installation instructions   8100 vortec harness instructions  

2003-2007 Vortec DBW cruise control instructions

Hyd brake switch relay

 E38 LS/Vortec harness instructions   


Larry's Electric harness Pin out charts (User account required)

Please contact for a user name and password.
User accounts are for current/past customers only.  Please include the date of purchase, invoice number, and desired password.

TPI Harness pin out

TBI Harness pin out

LT1 Harness pin out

LS1 Harness pin out

Vortec V6 Harness pin out

LS series DBW Harness pin out



Dyno services now available
Designed to test Sport Compacts, RWD Drag Cars, Diesel Trucks, and Motorcycles with a capacity of 2,000 HP at the wheels.





Car Image We now offer programming services for the E38, E67 pcm's, T42 and Allison TCM




Dave from Texas

"Excellent craftsmanship, easy to install.  When I had questions they were always happy to help"

Jason from California

"Made my swap a piece of cake, i will be purchasing more for future projects"