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Gen 4 58x Electronic Throttle
GMT400 (OBS) Integration Style Harnesses

All integration harnesses on this page will be for use with the 1988 - 1999 Chevrolet/GMC GMT4xx Series of vehicles. Also known as "OBS" or "Old Body Style", these vehicles are listed below.


                                                                         Source: Wikipedia

All integration harnesses currently require a factory harness from the exact Year/Make/Model of the vehicle being swapped. Harnesses that are different may cause integration issues due to changes in the wiring between years, options, and trim levels. If you do not have one available, LS Harness Connection may attempt to locate and purchase one for use.

Integration harnesses will use the factory fuse block and OEM PCM mounting location and will directly connect with your existing vehicle systems like ABS, HVAC, and dash/chassis wiring harnesses. This minimizes on vehicle wiring work that must be completed and offers a factory-style installation for your vehicle.

Electronic Automatic using T42 Transmission Controller (4L60E/4L65E/4L70E/4L80E)

Electronic Automatic using  T43 Transmission Controller (6L80E/6L90E)

Non - Electronic Auto / Manual Transmission

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