Dorman 600-490 4WD Actuator
4WD Actuator Upgrade for GM Trucks
Dorman 600-490 is a 4WD actuator upgrade kit for older Chevrolet and GMC trucks that use a thermal differential actuator. It replaces the slower wax-based design with an electric actuator setup for more responsive 4WD engagement on supported GM applications. This kit is built around the Dorman 600-101 electric actuator and 600-600 actuator harness for a direct update to the original thermal system.
- Upgrades older thermal differential actuator systems to electric operation
- Includes a 4WD electric actuator and matching wiring harness
- 3-terminal connector design with rectangular connector shape
- 98.5-inch wiring harness length
- Plastic housing construction
- Four Wheel on Demand conversion: Yes
How This 4WD Actuator Works
On many 1988-1996 Chevrolet K1500, K2500, and K3500 trucks, as well as 1992-1996 GMC K1500, K2500, and K3500 models, the original thermal actuator can become sluggish as the internal wax ages. Dorman 600-490 updates that system with an electric differential actuator for faster response and more consistent operation. It also fits select Chevrolet Blazer, K1500 Suburban, K2500 Suburban, Tahoe, and GMC Yukon applications listed below.
This part cross-references OE numbers 26013495 and 88959465 for the same application. Search terms such as 1988-1996 Chevrolet K1500 4WD actuator upgrade kit and 1992-1996 GMC Yukon electric actuator harness replacement match this application family.
Vehicle Fitment
- Fits 1988-1996 Chevrolet K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K3500, N/A, upgrade to electric type actuator
- Fits 1995-1996 Chevrolet Tahoe, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K3500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC Yukon, N/A, upgrade to electric type actuator
- Fits 1992-1994 Chevrolet Blazer, N/A, upgrade to electric type actuator
Installation Notes and Tips
Verify the vehicle uses the original thermal differential actuator before installation. Compare the connector style, terminal count, and harness routing to the existing setup on the transfer case area. The included harness is part of the conversion, so the original wiring should be checked for corrosion, damaged terminals, or prior repairs before final assembly.
Quality Assurance
Dorman designs this actuator upgrade kit to precise specifications for the listed GM truck and SUV applications. The kit updates an aging thermal system to an electric differential actuator arrangement for a more modern service solution on the specified Chevrolet and GMC platforms.
Dorman 600-490 4WD Actuator
4WD Actuator Upgrade for GM Trucks
Dorman 600-490 is a 4WD actuator upgrade kit for older Chevrolet and GMC trucks that use a thermal differential actuator. It replaces the slower wax-based design with an electric actuator setup for more responsive 4WD engagement on supported GM applications. This kit is built around the Dorman 600-101 electric actuator and 600-600 actuator harness for a direct update to the original thermal system.
- Upgrades older thermal differential actuator systems to electric operation
- Includes a 4WD electric actuator and matching wiring harness
- 3-terminal connector design with rectangular connector shape
- 98.5-inch wiring harness length
- Plastic housing construction
- Four Wheel on Demand conversion: Yes
How This 4WD Actuator Works
On many 1988-1996 Chevrolet K1500, K2500, and K3500 trucks, as well as 1992-1996 GMC K1500, K2500, and K3500 models, the original thermal actuator can become sluggish as the internal wax ages. Dorman 600-490 updates that system with an electric differential actuator for faster response and more consistent operation. It also fits select Chevrolet Blazer, K1500 Suburban, K2500 Suburban, Tahoe, and GMC Yukon applications listed below.
This part cross-references OE numbers 26013495 and 88959465 for the same application. Search terms such as 1988-1996 Chevrolet K1500 4WD actuator upgrade kit and 1992-1996 GMC Yukon electric actuator harness replacement match this application family.
Vehicle Fitment
- Fits 1988-1996 Chevrolet K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K3500, N/A, upgrade to electric type actuator
- Fits 1995-1996 Chevrolet Tahoe, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K3500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC Yukon, N/A, upgrade to electric type actuator
- Fits 1992-1994 Chevrolet Blazer, N/A, upgrade to electric type actuator
Installation Notes and Tips
Verify the vehicle uses the original thermal differential actuator before installation. Compare the connector style, terminal count, and harness routing to the existing setup on the transfer case area. The included harness is part of the conversion, so the original wiring should be checked for corrosion, damaged terminals, or prior repairs before final assembly.
Quality Assurance
Dorman designs this actuator upgrade kit to precise specifications for the listed GM truck and SUV applications. The kit updates an aging thermal system to an electric differential actuator arrangement for a more modern service solution on the specified Chevrolet and GMC platforms.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
4WD Actuator Upgrade for GM Trucks
Dorman 600-490 is a 4WD actuator upgrade kit for older Chevrolet and GMC trucks that use a thermal differential actuator. It replaces the slower wax-based design with an electric actuator setup for more responsive 4WD engagement on supported GM applications. This kit is built around the Dorman 600-101 electric actuator and 600-600 actuator harness for a direct update to the original thermal system.
- Upgrades older thermal differential actuator systems to electric operation
- Includes a 4WD electric actuator and matching wiring harness
- 3-terminal connector design with rectangular connector shape
- 98.5-inch wiring harness length
- Plastic housing construction
- Four Wheel on Demand conversion: Yes
How This 4WD Actuator Works
On many 1988-1996 Chevrolet K1500, K2500, and K3500 trucks, as well as 1992-1996 GMC K1500, K2500, and K3500 models, the original thermal actuator can become sluggish as the internal wax ages. Dorman 600-490 updates that system with an electric differential actuator for faster response and more consistent operation. It also fits select Chevrolet Blazer, K1500 Suburban, K2500 Suburban, Tahoe, and GMC Yukon applications listed below.
This part cross-references OE numbers 26013495 and 88959465 for the same application. Search terms such as 1988-1996 Chevrolet K1500 4WD actuator upgrade kit and 1992-1996 GMC Yukon electric actuator harness replacement match this application family.
Vehicle Fitment
- Fits 1988-1996 Chevrolet K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 Chevrolet K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 Chevrolet K3500, N/A, upgrade to electric type actuator
- Fits 1995-1996 Chevrolet Tahoe, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K1500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K1500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K2500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC K2500 Suburban, N/A, upgrade to electric type actuator
- Fits 1988-1996 GMC K3500, N/A, upgrade to electric type actuator
- Fits 1992-1996 GMC Yukon, N/A, upgrade to electric type actuator
- Fits 1992-1994 Chevrolet Blazer, N/A, upgrade to electric type actuator
Installation Notes and Tips
Verify the vehicle uses the original thermal differential actuator before installation. Compare the connector style, terminal count, and harness routing to the existing setup on the transfer case area. The included harness is part of the conversion, so the original wiring should be checked for corrosion, damaged terminals, or prior repairs before final assembly.
Quality Assurance
Dorman designs this actuator upgrade kit to precise specifications for the listed GM truck and SUV applications. The kit updates an aging thermal system to an electric differential actuator arrangement for a more modern service solution on the specified Chevrolet and GMC platforms.
