User's Manual

1.0 INTRODUCTION

We at Painless Performance Products believe you have purchased the most up-to-date and easiest to install

automotive fuel injection harness on the market. All components to this harness are new. All harnesses are tested

for faults before they leave the factory floor. This harness is designed for easy installation, even if you have no

electrical experience.

The 60506-7 harness is designed to be a complete wiring system for the fuel injection system on General Motors

1997-98 LS1 injected engines and to control the 4L60E automatic or T56 manual transmission using the 1998

computer Service #16238212. The 60508-9 harness is designed to be a complete wiring system for the fuel injection

system on a 1999-02 LS1 with a T56 manual or a 4L60E automatic transmission. Factory computers from 1999-02

Camaros or Firebirds, equipped with the LS1, may be used with this harness. These computers were service number

9354896 or 12200411. These harnesses include all wiring that is needed by the computer to run and control the fuel

injection system and transmission. A module has been included to bypass the vehicle anti theft system (VATS)

incorporated in the computer from the factory. This harness along with the VATS module included in the kit will get

the LS1 engine and transmission up and operating. It is recommended that you have the computer reprogrammed to

remove anything in the original factory programming that relates to a device or devices that are not being used in

your particular vehicle.

NOTE: Most likely the check engine light will come on and stay on when using a computer with the original factory

programming. This is normal and is why we recommend that the computer be reprogrammed.

NOTE: Most remanufactured computers come without any programming in them and must be programmed before

they can be used.

NOTE: The program in your computer must match the transmission that you plan on using. You cannot run a 4L60E

transmission with a computer programmed for a T56.

Usually, the computer, relays and fuse block can easily be mounted under the dash. Most of the wiring in the harness

has been pre-terminated to the proper connector and all wire has been GM color-coded. All wiring is TXL, 600 volt,

and 125 degree centigrade with cross-link insulation.

These fuel injection system harnesses have been divided into the following three major groups:

ENGINE GROUP Includes wiring for the fuel injectors, ignition system, and sensors.

DASH GROUP Includes ignition feed wire, assembly line diagnostic link (DLC) connector,

check engine light, computer connectors, brake switch wiring, gear shift indicator wiring,

tachometer wiring, VATS, fuse block, fuel pump relay connector

(These emission sections are not included in the 60508-9 harnesses) air pump, air bleed,

canister purge, canister vent, air pump and air solenoid relays.

TAIL GROUP Includes VSS wiring, transmission wiring and a power wire for the fuel pump

2.0 ABOUT THESE INSTRUCTIONS

These instructions provide information for the installation of the 60506, 60507, 60508 & 60509 LS1 fuel injection

harness kits. The contents of these instructions are divided into the following major sections:

1.0 INTRODUCTION

2.0 ABOUT THESE INSTRUCTIONS

3.0 TOOLS NEEDED

4.0 PRE-INSTALLATION AND HARNESS ROUTING GUIDELINES

5.0 GENERAL INSTALLATION INSTRUCTIONS

6.0 GM LS1 FUEL INJECTION HARNESS KIT

7.0 TROUBLE-SHOOTING INSTRUCTIONS AND TROUBLE CODES

Sections are further divided into Paragraphs and Steps. Throughout, the Figure numbers refer to illustrations and

the Table numbers refer to information in tables. These are located in or near the sections or paragraphs to which

they correspond. Always pay careful attention to any notes or any text labeled CAUTION.