Send power to your diesel's glow plugs for cold-start preheating with the Standard Diesel Glow Plug Relay RY-585. It is a direct-fit replacement for the listed applications: the 2001-2004 Chevrolet Silverado 2500 HD, 2001-2004 Chevrolet Silverado 3500, 2001-2004 GMC Sierra 2500 HD, and 2001-2004 GMC Sierra 3500. See the Buyer's Guide tab for engine details.
A glow plug relay is the switch that routes high current to the glow plugs during the preheat cycle. This helps warm the combustion chambers before and during cold cranking. This part is also listed as a diesel glow plug controller.
Signs this relay may need replacing: hard or extended cranking in cold weather, rough running or white smoke right after a cold start, or glow plugs that are not receiving power. Glow plugs, wiring, and the control circuit can cause the same symptoms, so diagnose the preheat system before replacing anything. If a failed relay is the cause, this replaces it.
Interchange: R6125 · 20022 · AR6125 · 97225608 · 97371491
This part cross-references / interchanges with the following part numbers:
What vehicles does the Standard RY-585 fit?
It fits the 2001-2004 Chevrolet Silverado 2500 HD and 3500 and the 2001-2004 GMC Sierra 2500 HD and 3500. See the Buyer's Guide tab for engine details.
What does a diesel glow plug relay do?
It acts as a switch that sends high current to the glow plugs during the preheat cycle. This helps warm the combustion chambers for cold starts.
What are signs the glow plug relay may be failing?
Signs include hard or long cranking when cold, white smoke after a cold start, or glow plugs not getting power. Glow plugs and wiring can cause the same symptoms, so diagnose the cause first.
Which part numbers does RY-585 interchange with?
It interchanges with R6125, 20022, AR6125, 97225608, and 97371491.
How is this relay built?
It has a composite housing designed to protect against harsh temperatures and demanding under-hood conditions. It is made at TS16949 and ISO9001 certified facilities.
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.
