1999 - 2006 GM Gen III 4.8, 5.3 & 6.0L Harness Extra Length Mechanical TB

Painless Performance 1999 - 2006 GM Gen III 4.8, 5.3 & 6.0L Harness Extra Length Mechanical TB Painless Performance 1999 - 2006 GM Gen III 4.8, 5.3 & 6.0L Harness Extra Length Mechanical TB
  • Year: 1999 - 2006
  • Make: GM
  • Model: C & K Truck
  • Engine: 4.8L, 5.3L, 6.0L w/ Mechanical Throttle Body
  • Trans: 4L60E, 4L80E

This harness is designed for the 1999-2006 4.8L, 5.3L, 6.0L mechanical throttle body engines using an LS1 / LS6 PCM with a 4L65E, 4L70E, 4L80E, or 4L85E transmission. 2003-2006 Engines will require a mechanical throttle body to be installed. 2003-2006 engines which were originally flex fuel will also require Delphi Multec 2 (factory truck style) injectors to be installed. Harnesses do not include connections for the rear O2 sensors or fuel tank pressure sensor but are available separate. Included with this harness is a 10 circuit weatherproof fuse block, detailed step-by-step manual, and GM color coded wires with labels for easy installation.

This extended length harness allows eight feet from the back of the intake manifold to where the fuseblock and ECM mount. Perfect for those that plan to mount these components under the seat or in the center console.

This kit includes:
All new fuel injection harness with OEM fitment connectors and harness breakouts
OBDII connector, mounting bracket, and check engine light
Rubber grommet
Mounting hardware
Installation manual

Purchase this harness today and qualify for Painless Performance®™ to flash your ECM for free. Click here for details.

**Please note that this harness does not support Flex Fuel USCAR Injectors.**

  • Number of Circuits: 8 Fuses with Ignition, Fuel Pump & Air Pump Relays
  • Harness Length: 8 Feet Between Engine and ECM
  • Fuse Type: Blade
  • Firewall Passthrough: Grommet
  • Color Code Based: 1999 C1500 Truck
  • Circuit Designations: Printed Wire Tags on all Connectors and Open Ended Wires

The Fuse Block Protects The Following Circuits:
Air Pump & Air Pump Solenoid
Canister Purge, Canister Vent, Transmission, & Park Neutral Position Switch
Driver Side Injectors and Coils
Dual 40 amp Ignition Relays
Fuel Pump
Heated O2 Sensors, Mass Airflow Sensor, & Brake Switch
Pass Side Injectors and Coils
ECM IGN and Malfunction Indicator Lamp

This harness includes connections for the following components:
A/C Request
Air Pump
Air Pump Relay
Air Pump Solenoid
Brake Switch
Cam Position Sensor
Canister Purge
Canister Vent
Crank Position Sensor
Data Link Connector
Driver/Pass Front O2 Sensors
EGR Valve
Engine Coolant Temperature
Fan #1 Relay Ground ECM Activation
Fan #2 Relay Ground ECM Activation
Fuel Pump
Fuel Pump Relay
Fuel Pump Test
Idle Air Control
Ignition Coils
Ignition Switch Signal
Input Speed Sensor
Knock Sensors
Malfunction Indicator Lamp
MAP Sensor
Mass Airflow Sensor & Intake Air Temperature Sensor
Output Speed Sensor
Park/Neutral Switch
Reverse Lights
Starter Relay
Throttle Position Sensor
VSS Output for Speedometer

For complete factory emissions control purchase optional 60323 emissions harness to connect Bank 1 & 2 Rear O2 and Fuel Tank Pressure Sensor.

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