Take back control of your heater and A/C fan with this Four Seasons switch, the front HVAC Blower Motor Resistor / Switch 20466, designed to regulate current to the blower motor so the fan can run at each selected speed. It fits many vehicles, among them the 1979-1996 GMC G3500, 1979-1995 GMC G1500 and 1979-1995 GMC G2500, as a direct-fit replacement for the listed applications. See the Buyer's Guide tab for the full list.
The catalog lists this part as a switch, and Four Seasons describes it as an HVAC blower motor resistor. Both names refer to the same part. Four Seasons engineers and tests the unit and draws on over 50 years of mobile A/C experience.
- Vehicle-specific applications: precision engineered for the listed applications.
- Quality contacts: designed to provide proper electrical conductivity.
- OE-style connectors: connect to the vehicle's wiring harness.
Signs this part may need replacing:
- The blower runs only on high.
- One or more fan speeds no longer work.
- The blower does not run at all.
The blower motor, the HVAC control, the wiring or a fuse can cause the same symptoms, so diagnose the circuit before replacing. If a failed resistor is the cause, the 20466 replaces it.
Interchange: 3929053 · A07056 · JA1616
This part cross-references / interchanges with the following part numbers:
3929053, 20466, A07056, JA1616
