Dorman 901-162 4WD Switch

Dorman 901-162 4WD Switch for GM Trucks

This Dorman 4WD switch is built for drivers who need a direct replacement for the dash-mounted transfer case switch on select Chevrolet and GMC trucks and SUVs. It matches the original switch’s appearance and function for a clean OE-style repair.

Designed for 2001-2002 Chevrolet Silverado 2500, Silverado 2500 HD, Silverado 3500, Suburban 2500, and GMC Sierra 2500, Sierra 2500 HD, Sierra 3500, plus 2002 Chevrolet Avalanche 2500 and GMC Yukon XL 2500 applications with NP1 electronic shift transfer case systems.

• Dash-mounted 4WD switch for electronic transfer case control
• Blade terminal type for the specified factory connection
• No attached lead wires
• No wiring harness included
• Engineered to match original switch appearance and function
• Built from quality materials for dependable operation and durability

Detailed Product Overview

Dorman 901-162 is a replacement 4WD switch for GM trucks and SUVs equipped with the 2-speed electronic shift transfer case and the correct connector configuration. It is intended for vehicles such as the Chevrolet Silverado 2500 HD and GMC Sierra 2500 HD, where the dash switch communicates with the transfer case system to select 4WD modes. This part cross-references Standard Ignition TCA-31 for the same application.

Common Problems This Switch Can Address

• Inoperative 4WD mode selection from the dash
• Intermittent transfer case switch response
• Worn, faded, or damaged factory switch face
• Electrical contact issues caused by an aging switch
• Restoring proper control of the electronic shift transfer case

Installation Notes and Fitment Tips

Fits 2002 Chevrolet Avalanche 2500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 Chevrolet Silverado 2500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 Chevrolet Silverado 2500 HD, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 Chevrolet Silverado 3500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 Chevrolet Suburban 2500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 GMC Sierra 2500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 GMC Sierra 2500 HD, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 GMC Sierra 3500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case). Fits 2001-2002 GMC Yukon XL 2500, dash; small connector is 6-way and large connector is 8-way; w/RPO Code NP1 (2 Speed, Electronic Shift, Transfer Case).

Verify the connector style and RPO code before ordering to confirm the correct GM 4WD switch for your vehicle. The dash location and blade terminal design help support a straightforward replacement on the specified Chevrolet Silverado, Suburban, Avalanche, Sierra, and Yukon XL applications.

Quality Assurance

Dorman designs this replacement switch to match original equipment appearance and function while using quality materials for reliable performance and durability.