Dorman 600-600 4WD Actuator Wiring Harness

4WD Actuator Wiring Harness for Older GM Trucks

Restore cleaner 4WD actuator operation on select Chevrolet and GMC trucks and SUVs with this Dorman 4WD actuator wiring harness. It is used when upgrading from a thermal style axle actuator to an electric actuator for more direct engagement and improved 4WD function.

• Plug-in harness with pin terminals for straightforward electrical connection
• Plastic jacket material for routing protection in underhood and chassis environments
• Built for 4WD actuator conversion use with Dorman actuator 600-101
• Direct replacement-style harness for select GM full-size 4x4 applications
• Cross-references OE part number 12376316 for the same application

Application Details

Compatible with 1988-1996 Chevrolet K1500, 1992-1996 Chevrolet K1500 Suburban, 1994-1996 Chevrolet K2500, 1994-1996 Chevrolet K2500 Suburban, 1988-1996 Chevrolet K3500, 1995-1996 Chevrolet Tahoe, 1988-1996 GMC K1500, 1992-1996 GMC K1500 Suburban, 1994-1996 GMC K2500, 1994-1996 GMC K2500 Suburban, 1988-1996 GMC K3500, 1992-1996 GMC Yukon, 1992-1994 Chevrolet Blazer, plus 1988-1993 Chevrolet K2500 and GMC K2500, and 1992-1993 Chevrolet K2500 Suburban and GMC K2500 Suburban with the listed axle and GVW notes. For these Chevrolet K1500 and GMC K1500 4WD applications, the harness supports the electric actuator upgrade path used with Dorman 600-101.

What This Harness Helps Address

• Intermittent or unreliable 4WD engagement on older GM 4x4 systems
• Need to convert from a thermal axle actuator to an electric actuator setup
• Wiring mismatch during a 4WD actuator upgrade
• Connector issues when replacing aged actuator wiring on Chevrolet K1500 and GMC K1500 trucks
• Service repairs on select Chevrolet Blazer, Tahoe, Yukon, and K-series truck platforms

Installation Notes

Use this harness only with the specified actuator upgrade application and verify axle stamping or GVW notes before installation. The harness is plug-in style with pin terminals, so connector alignment and secure seating are important for proper operation. Confirm the vehicle’s 4WD actuator configuration matches the listed fitment before ordering.

Quality Assurance

Dorman supplies replacement components for repair and upgrade applications, and this harness is built to support the specified electric actuator conversion on compatible GM 4WD platforms. Part number 600-600 is the catalog reference for this wiring harness, and it cross-references OE number 12376316.