Keep your auxiliary battery circuit switching on command with the Standard Ignition Auxiliary Battery Relay, part number RY-1521. It is an electrically controlled switch that lets a low-current signal open and close the circuit feeding the auxiliary battery. It fits many vehicles, among them the 2002-2020 GMC Sierra 1500, 2002-2020 Chevrolet Tahoe and 2002-2020 GMC Yukon, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list and engine details.
This relay is cataloged as an auxiliary battery relay, a battery charge relay and an emergency vehicle light relay. If you're tracking down a 2002-2020 Chevrolet Tahoe relay for the auxiliary battery circuit, diagnose the cause first. If the original relay has failed, RY-1521 replaces it.
Signs this relay may need replacing include an auxiliary battery that is not charging, accessories on the auxiliary circuit that lose power, or a relay that does not click when commanded.
Interchange: R7026 · 20668 · AR7027 · 12135194 · 92257335
This part cross-references / interchanges with the following part numbers:
Is this the right Tahoe relay for my 2002-2020 Chevrolet Tahoe?
RY-1521 is listed for the 2002-2020 Chevrolet Tahoe, as well as the 2002-2020 GMC Sierra 1500 and 2002-2020 GMC Yukon. Check the Buyer's Guide tab to confirm your exact vehicle.
What does an auxiliary battery relay do?
It is an electrically controlled switch. A low-current control signal opens and closes the higher-current circuit to the auxiliary battery, connecting it only when commanded.
What are signs this relay may need replacing?
Signs include an auxiliary battery that won't charge, accessories on the auxiliary circuit that lose power, or a relay that doesn't click when commanded. Diagnose the cause before replacing the relay.
How is the Standard RY-1521 relay built?
It has a high-quality composite housing designed for harsh temperatures and demanding under-hood conditions. It is manufactured at TS16949 and ISO9001 certified facilities.
How do I install this relay?
Disconnect the negative battery cable, then remove the original relay and install RY-1521 in its place. Follow the vehicle service information for the relay location and the correct procedure.
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.
