Keep your four-wheel-drive controls responding with the Standard Ignition 4WD Switch TCA-45 — the electrical switch that carries the four-wheel-drive selection signal within your truck's 4WD control circuit. It drops in as a direct-fit replacement for the listed applications: the 2003-2004 Cadillac Escalade, Escalade ESV, and Escalade EXT, the 2003-2004 Chevrolet Tahoe, the 2003-2004 GMC Yukon, and the 2003-2005 GMC Yukon XL 1500.
Because a 4WD symptom can have several causes, diagnose the circuit before replacing to confirm the switch is the fault. This listing is for the switch as described.
Interchange: Manufacturer part number TCA-45 (also TCA45).
What is the Standard Ignition 4WD Switch TCA-45?
It is the electrical switch in the four-wheel-drive control circuit, opening or completing the path used to signal the 4WD system. This listing is for the switch as described.
What vehicles does the TCA-45 fit?
It is a direct-fit for the 2003-2004 Cadillac Escalade, Escalade ESV and Escalade EXT, the 2003-2004 Chevrolet Tahoe, the 2003-2004 GMC Yukon, and the 2003-2005 GMC Yukon XL 1500. See the "Vehicles it fits" section to confirm your vehicle.
What are signs my 4WD switch may need replacing?
Common signs include a 4WD indicator that behaves erratically or won't light, or difficulty engaging or disengaging four-wheel drive. If a failed switch is the cause, this part replaces it.
Should I diagnose before replacing the switch?
Yes. A four-wheel-drive fault can have several causes, so diagnose the circuit first to confirm the switch itself is at fault before replacing it.
Is the TCA-45 a direct-fit part?
Yes, it is a direct-fit replacement for the listed applications. Confirm your vehicle against the fitment list before ordering.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
