Four Seasons 35990 HVAC Blower Control Switch - Front

HVAC Blower Control Switch Overview

The Four Seasons Selector Switch 35990 is an HVAC blower control switch built for vehicles that use a manual lever-style blower selector or a compatible automatic A/C control setup. It features a male rectangular connector, 4 terminals, and meets or exceeds OEM requirements for direct replacement service.

Use this blower switch when the fan speed control no longer responds correctly in Chevrolet, GMC, Buick, Oldsmobile, and Pontiac applications. The Four Seasons Selector Switch line focuses on replacement HVAC electrical controls for older GM platforms, including truck, van, and passenger car fitments.

• Four Seasons Selector Switch part number 35990
• HVAC blower control switch / blower selector switch
• Male rectangular connector for straightforward electrical connection
• 4-terminal design
• Meets or exceeds OEM specifications
• Fits manual lever control and select A/C-equipped applications listed below

Detailed Product Description

Built as a direct-fit HVAC blower control switch, this Four Seasons 35990 replacement is used to restore blower speed selection in a wide range of GM vehicles. It is listed across 1983-1996 applications, including Chevrolet P30, Astro, G10, G20, G30, S10, Blazer, and GMC P3500, Safari, Jimmy, Sonoma, and related platforms. The part number 35990 also cross-references Gates 22764 for the same application.

For buyers searching for a Chevrolet S10 blower switch, GMC Safari heater control switch, or Oldsmobile Bravada HVAC selector switch, this part provides an OE-style electrical replacement for the original blower control function. The connector shape, terminal count, and switch type are the key match points for confirming application.

Common Problems This Part Can Solve

• Blower fan only works on certain speeds
• HVAC fan switch feels intermittent or unresponsive
• Heater or A/C blower will not change speed
• Worn internal contacts in the original selector switch
• Electrical connection issues at the blower control interface

Installation Notes and Fitment Tips

Fits 1984-1996 Chevrolet P30, N/A; Fits 1995-1996 GMC P3500, N/A; Fits 1992-1995 Chevrolet Astro, Front; Fits 1991-1995 Chevrolet G10, Front; Fits 1991-1995 Chevrolet G20, Front; Fits 1991-1995 Chevrolet G30, Front; Fits 1984-1995 GMC G1500, Front; Fits 1984-1995 GMC G2500, Front; Fits 1984-1995 GMC G3500, Front; Fits 1992-1995 GMC Safari, Front; Fits 1986-1994 Chevrolet S10, N/A; Fits 1986-1994 Chevrolet S10 Blazer, N/A; Fits 1992-1994 GMC Jimmy, N/A; Fits 1991-1994 GMC Sonoma, N/A; Fits 1991-1994 Oldsmobile Bravada, N/A.

Before ordering, verify the connector style, terminal count, and whether your vehicle uses manual HVAC controls or the listed A/C configuration. This part number 35990 is intended for the exact applications shown in the fitment data, including Chevrolet and GMC truck and van platforms.

Quality Assurance

Four Seasons lists this selector switch as meeting or exceeding OEM requirements, supporting a replacement that follows original equipment specifications for fit and function.