Painless Performance: GM 2003 - 2006 4.8L 5.3L 6.0L Non & Flex Fuel Injection Harness Std. Length

Year: 2003 - 2006
Make: General Motors
Model: C & K Truck/SUV
Engine: 4.8L, 5.3L, 6.0L w/ Throttle By Wire
Trans.: 4L60E, 4L80E

Transplant a Flex Fuel engine into your project hot rod!

For installations of 2003 - 2006, throttle by wire, Gen3 (4.8L - 5.3L - 6.0L) engines using V8 ECMs with Green and Blue TPAs. Engine codes supported are LR4, LM7, LM4, LQ4 and LQ9. Harness includes all connections for fuel injection operation: ECM, TAC module, Accelerator Pedal, IAC, CTS, IAT, MAF, MAP, Injectors (Non-flex and flex fuel connector pigtails included in kit), Fuel Composition Sensor, Coils, CMP, CKP, Knock, VSS, ISS, 4L60E & 4L80E Transmissions, Front Bank 1 & 2 O2 Sensors. Harness does not include any emission device connections. Harness incorporates its own 10 circuit/4 relay weather-proof fuseblock.

This standard length harness allows four 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 dash or in the glove box.

This kit includes:

All new fuel injection harness with OEM fitment connectors and harness breakouts
OBDII connector, mounting bracket and check engine light
Crimp-on terminals, 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.

Click here to identify which injector your engine is equipped with.

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2003 2004 2005 2006

Number of Circuits: 10 Fuses with 2 Ignition, 1 Cooling Fan & 1 Fuel Pump Relay
Harness Length: 4 Feet Between Engine and ECM
Fuse Type: Mini Blade
Firewall Passthrough: Grommet
Color Code Based: 2003 - 2006 C/K Truck
Connectors Included: ECM, TAC module, Accelerator Pedal, IAC, CTS, IAT, MAF, MAP, Injectors (Non-flex and flex fuel connector pigtails included in kit), Fuel Composition Sensor, Coils, CMP, CKP, Knock, VSS, ISS, 4L60E & 4L80E Transmissions, Front Bank 1 & 2 O2 Sensors
Circuit Designations: Printed Wire Tags on all Connectors and Open Ended Wires

Other Gen3 harnesses by Painless Performance™®:

60217- 1999-2005 Gen3; Mechanical throttle body; 4.8/5.3/6.0L; Non-Flex Fuel; Utilizes ECM with service #12200411; Standard length.

60218- 1999-2005 Gen3; Mechanical throttle body; 4.8/5.3/6.0L; Non-Flex Fuel; Utilizes ECM with service #12200411; Extra length.

60219- 2000-2002 Gen3; throttle by wire; 4.8/5.3/6.0L; Non-Flex Fuel; Utilizes ECM with service #12200411; Standard length.

60220- 2000-2002 Gen3; throttle by wire; 4.8/5.3/6.0L; Non-Flex Fuel; Utilizes ECM with service #12200411; Extra length.