4WD Signal Wire (4-Low Shift Point Adjust) - Gen 3 LS Swap Add-On

Adds a 4WD signal wire to your Gen 3 LS/Vortec standalone harness so the PCM/TCU knows when the transfer case is in 4-Low, allowing shift points to adjust accordingly for proper transmission behavior off-road.

Designed to pair with our 99-07 Gen 3 LS/Vortec Engine Controller Kit (KIT-GEN3-DBC-AUTO) — note in your order comments if you'd like this added.

Sourced through PSI Conversion.