1999-2006 Gen III DBC Standalone Harness with 4L80e and Multec Injectors – H305

Our harnesses are designed for installing these new GM EFI engines into your ride, whatever it may be. This harness is specific for 1999-2007 4.8, 5.3, and 6.0 Vortec engines with RPO Codes LR4, LM7, L59, LM4, LQ4, and LQ9 with a Drive by Cable (Mechanical) Throttle Body and Multec Injectors.

On 2003 and newer applications leave a note with your year and PCM service number (be sure to verify it is DBC capable or contact us) so we can install green retainers on the harness.

Why BP Automotive?

• Built by BP Automotive at our dedicated harness assembly facility.
• GM color-coded TXL wire to meet or exceed OEM standards
• OEM-grade ultrasonic welded splicing is used for power distribution
• OEM-Grade crimp quality control
• Computer tested before leaving to ensure you get a harness free of human error
• We only use OEM Aptiv (Formerly Delphi), Kostal, Bosch, Molex, and Yazaki connectors, seals, and terminals
• Connector Position Assurance Locks (CPA Locks)
• Sliding Delphi Grommet that can be positioned on the main harness line to seal your firewall
• 5 feet long from the rear passenger side of the intake
• Oxygen Sensor and Crankshaft Position circuits are routed to keep these circuits away from heat
• PCM can be mounted inside the passenger compartment or the engine bay
• OEM fuse block with all covers, labeling, and splash guards for a long-lasting weather-resistant installation

Additional Info

Our LS swap harnesses also require the removal of the VATS and emissions systems from the PCM. This harness also requires the use of a Red and Blue PCM service numbers 12200411 or 9354896, which can be purchased from BP Automotive. This application uses an Electronic Automatic Transmission applications which will also require a double pole brake switch for converter lock-up control. This can also be purchased from BP Automotive by selecting yes in the drop-down when purchasing your harness.

This harness is for pre-emissions vehicles or for off-road use only. This harness does not have provisions for EGR, AIR, EVAP, or Rear O2 Sensors. We can add these for an additional cost, however, in most cases, they are not needed. IF EMISSIONS ARE NEEDED YOUR HARNESS WILL INCUR A LEAD TIME. Please email for more information!

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