Standard Ignition TCA-26 4WD Indicator Light Switch

4WD Indicator Light Switch for GM Trucks and SUVs

The Standard Ignition TCA-26 is a direct-fit 4WD indicator light switch for select Chevrolet and GMC applications. It uses a white plastic body with a female connector and 2 bullet terminals for a straightforward OE-style replacement on transfer case-equipped vehicles.

• Direct-fit replacement for the four wheel drive indicator lamp switch
• White plastic finish with female connector and female terminals
• 2-terminal bullet connection for select 2-pin applications
• Built with materials suited for demanding underbody conditions
• Extensively tested for electrical reliability and consistent operation

Fitment and Application Details

Compatible with 1988-2000 Chevrolet K1500, 1988-2000 Chevrolet K2500, 1988-2000 Chevrolet K3500, 1999-2000 Chevrolet Silverado 1500, 1999-2000 Chevrolet Silverado 2500, 1992-1998 Chevrolet Suburban 1500, 1992-1998 Chevrolet K1500 Suburban, 1992-1998 Chevrolet K2500 Suburban, 1995-1998 Chevrolet Tahoe, 1988-1999 GMC K1500, 1988-2000 GMC K2500, 1988-1999 GMC K3500, 1992-1998 GMC K1500 Suburban, 1992-1998 GMC K2500 Suburban, 1994-1998 GMC K3500, 1992-1998 GMC Yukon, and 1992-1994 Chevrolet Blazer. This part number, TCA-26, is also listed for transfer case-mounted 2-pin applications on several GMC and Chevrolet models.

This part cross-references Dorman OE Solutions 600-506 for the same application.

What This Switch Helps Resolve

• Inoperative 4WD indicator lamp on the dash
• Incorrect or intermittent transfer case signal to the indicator circuit
• Broken, worn, or heat-damaged original switch housing
• Electrical connection issues at the transfer case switch
• Restoration of 4WD status indication on GM trucks and SUVs

Installation Notes and Tips

Verify the connector style, terminal count, and transfer case mounting location before installation. The TCA-26 is listed for 2-pin applications, including some vehicles with the switch mounted on the transfer case. Confirm the vehicle year, make, model, and notes against the fitment list before ordering.

Quality Assurance

Standard Ignition states that this 4WD indicator light switch is manufactured as an OE replacement and is tested for reliability. The brand also notes complete quality control throughout the manufacturing process.