1999-2006 GM Gen III 4.8/5.3/6.0L EFI Harness Extra Length - Mechanical TB
This harness is standalone and is not intended to replace the OEM engine wiring. Standalone harnesses are intended to run the designated engine and transmission only, generally when swapped into another vehicle.
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 4L60E, 4L65E, 4L70E, 4L80E, 4L85E,or manual 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 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
**Please note that this harness does not support Flex Fuel USCAR Injectors.**
We recommend checking the online manual for the full list of required mating parts prior to ordering.
Number of Circuits: 8 Fuses with Ignition, Fuel Pump and 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 and Air Pump Solenoid
- Canister Purge, Canister Vent, Transmission, and Park Neutral Position Switch
- Driver Side Injectors and Coils
- Dual 40 amp Ignition Relays
- Fuel Pump
- Heated O2 Sensors, Mass Airflow Sensor, and Brake Switch
- Pass Side Injectors and Coils
- ECM B+ and DLC B+
- 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
- Alternator
- 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
- Grounds
- Idle Air Control
- Ignition Coils
- Ignition Switch Signal
- Injectors
- Input Speed Sensor
- Knock Sensors
- Malfunction Indicator Lamp
- MAP Sensor
- Mass Airflow Sensor and Intake Air Temperature Sensor
- Output Speed Sensor
- Park/Neutral Switch
- ECM
- Reverse Lights
- Starter
- Starter Relay
- Tachometer
- Throttle Position Sensor
- Transmission
- VSS Output for Speedometer
For complete factory emissions control purchase optional PPP60323 emissions harness to connect Bank 1 and 2 Rear O2 and Fuel Tank Pressure Sensor.
Fitment:
- Engine: 4.8L, 5.3L, 6.0L w/ Mechanical Throttle Body
- Trans.: 4L60E, 4L65E, 4L70E, 4L80E, 4L85E, or manual
