2003-2004 LB7 to LBZ conversion harness

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Convert your 03-04 LB7 to an 06-07 LBZ!



If you have a 2003-2004 LB7, and want to no-fuss easily upgrade to a 2006-2007 LBZ and 6-speed Allison, you are now in luck!
BT DieselWorks has developed a custom adapter harness that easily plugs inline with an LBZ engine harness and 2003-2004 body harness to make installation of an LBZ into your 2003-2004 truck a snap! No cutting, no splicing, no swapping pins around. This harness plugs in under the fuse block, and also includes the wires (with proper pins pre-crimped) to run to the OBD port, and to the shifter, so the LBZ-style "tap-shift" shifter is plug and play with the 2004-2005 truck as well.

NOTE: You will need the following items for the 2003-2004 to LBZ swap, in addition to this adapter harness. You must also send us your new 06-07 LBZ ECM for custom programming! Custom ECM programming in addition to this harness is required.

LBZ engine
LBZ 6-speed Allison transmission
LBZ 6-speed TCM
LBZ "on engine" wiring harness (the harness with the fuel injector connectors on it)
LBZ "underhood" wiring harness (the harness with the LBZ ECM/TCM connectors on it, as well as the long tail that goes down to the transmission)

Please click the "Installation Guides" link on the top menu bar to download installation instructions in PDF format.

All BT DieselWorks-manufactured products are fully-warrantied for 1 year. Products from other manufacturers may or may not have specific warranties. See individual product descriptions for details. -------- All sales are final. Returns will be given as full price in store credit, or money refund plus 40% restocking fee.

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