This harness is designed to be a complete wiring harness for fuel injection system on GM 1997-2006 Vortec engines with Drive by cable throttle body and 4l60e transmissions
The wiring harness is designed to mount under the dash or in the kick panel on the right side of the vehicle.
Compatibility:

GM LS1 Vortec 1997-2006 4.8 5.3 6.0 engine with 4l60e

Package list:
1 x Engine Wiring Harness
1 x Instruction Manual
All Vortec engines require VATS to be removed from the PCM.
Vortec harness utilize two sensors on each side of the engine, one before and after the catalytic converter. The rear O2 sensors (after the catalytic converter) are NOT used.

When using 4L60E or 4L80E transmission you Must have a two-position brake switch. These are necessary to allow proper function of the TCC. The brake switch should be closed (not electronically connected) when brakes are not being applied and open (not electronically connected) when brakes are being applied. This is the opposite of a standard brake switch.