Dorman 600-101 4WD Actuator

Dorman 600-101 4WD Actuator for GM Trucks and SUVs

The Dorman 600-101 4WD actuator is a direct replacement for the original equipment unit on specific applications. It is reverse engineered to restore proper 4WD operation on vehicles such as Chevrolet Silverado, GMC Sierra, Tahoe, Yukon, and related GM platforms.

Key Features

• Direct replacement 4WD actuator for select GM driveline applications
• Reverse engineered to restore original functionality
• 5-terminal blade connection for supported vehicles
• Plastic housing construction
• Package includes the 4WD actuator assembly
• Wiring harness is not included

Detailed Description

Built for specific Chevrolet, GMC, Cadillac, and Isuzu applications, this Dorman 600-101 actuator is used to replace a failed factory 4WD actuator and return the transfer case or front axle engagement system to normal operation. It is a direct OE-style replacement for vehicles that use a five-pin square plug, including many Silverado and Sierra models, as well as Tahoe, Yukon, Suburban, Avalanche, Colorado, Canyon, and Escalade applications. This part cross-references Standard Ignition TCA-19 for the same application.

What It Helps Solve

• 4WD system that will not engage or disengage properly
• Intermittent front axle engagement
• Faults caused by a worn or failed factory actuator
• Loss of reliable transfer case-to-front axle command response
• Replacement needs on GM trucks and SUVs with a five-pin square plug

Installation Notes and Fitment

Fits 2015 Chevrolet Silverado 1500, N/A, w/Five Pin Square Plug. Fits 2014-2015 Chevrolet Silverado 2500, N/A, w/Five Pin Square Plug. Fits 2014-2015 Chevrolet Silverado 2500 HD, N/A, w/Five Pin Square Plug. Fits 2015 Chevrolet Silverado 3500, N/A, w/Five Pin Square Plug. Fits 2014-2015 Chevrolet Silverado 3500 HD, N/A, w/Five Pin Square Plug. Fits 2014-2015 GMC Sierra, N/A, w/Five Pin Square Plug. Fits 2015 GMC Sierra 1500, N/A, w/Five Pin Square Plug. Fits 2014-2015 GMC Sierra 2500 HD, N/A, w/Five Pin Square Plug. Fits 2014-2015 GMC Sierra 3500 HD, N/A, w/Five Pin Square Plug. Fits 2014-2015 GMC Yukon, N/A, w/Five Pin Square Plug. Fits 2014 Chevrolet Suburban 1500, N/A, w/Five Pin Square Plug. Fits 2014 GMC Yukon XL 1500, N/A, w/Five Pin Square Plug.

• Verify the vehicle uses a five-pin square plug before ordering
• Confirm the original actuator style matches the blade-terminal, 5-terminal design
• Inspect the connector and wiring condition during replacement
• Use the vehicle service procedure for proper installation and calibration checks

Quality Assurance

Dorman engineers this actuator as a direct OE replacement for specific applications, using reverse-engineered specifications to restore proper 4WD functionality. The plastic housing and OE-style terminal layout support a factory-like fit on the listed GM vehicles.