Four Seasons 37640 HVAC Blower Control Switch - Front

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Selector Switch

Four Seasons 37640 HVAC Blower Control Switch - Front

Brand	Four Seasons BD8860
ABS Tone Ring Included	No
Bolt Circle Diameter	4.5
Bolt Circle Diameter	114.3
Bolt Hole Diameter	0.65
Bolt Hole Diameter	16.4
Bolt Hole Quantity	5
Brake Surface Width	2.93
Brake Surface Width	74.4
Center Hole Diameter	2.83
Center Hole Diameter	72
Construction	Composite
Material	Cast Iron / Steel Top
Maximum Brake Diameter (Discard)	11.09
Maximum Brake Diameter (Discard)	281.69
Nominal Drum Diameter	11
Nominal Drum Diameter	279.4
Outer Cooling Fins	Yes
Outside Diameter	13.56
Outside Diameter	344.4
Overall Height	4.44
Overall Height	112.8
Rust Resistant Coating	No
Product line	Selector Switch
Fits	—100 vehicles

Selector switch. Controls blower speed with a round male connector.

HVAC blower control switch for straightforward replacement.

Four Seasons Selector Switch line for dependable HVAC control.

Cross-references Four Seasons 37640, 1S1412 and 1572226 for the same application. See all 6.

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HVAC Blower Control Switch for Front Climate Control

Four Seasons 37640 is a selector-style HVAC blower control switch for front climate control systems. It uses a male round connector with a single terminal and is specified as a blower switch for direct replacement in supported vehicles.

Compatible With Chevrolet Astro and GMC Safari front HVAC systems, this switch also serves select Chevrolet Express, GMC Savana, Chevrolet G30, and GMC G3500 applications. Four Seasons 37640 is built for vehicles that need a front blower selector switch replacement with the correct connector style and terminal layout.

Key Features

Four Seasons Selector Switch line
Part number 37640
HVAC blower control switch / selector switch
Male connector with round shape
Single-terminal design
Front position application
Direct-fit replacement for listed Chevrolet and GMC vehicles

Detailed Description

Four Seasons 37640 is an HVAC blower control switch used to select fan speeds in the front climate control panel. The selector switch design and connector configuration are matched to the listed applications, including Chevrolet Astro, GMC Safari, Chevrolet Express van models, GMC Savana van models, Chevrolet G30, and GMC G3500. If you are replacing a worn or intermittent front blower switch, this part number 37640 provides the correct fitment profile for the specified vehicles.

This part cross-references A10240 and SW1463 for the same application.

What It Helps Fix

Blower fan speeds that do not respond correctly
Intermittent HVAC fan operation at the dash control
Selector knob positions that fail to activate the blower
Worn electrical contacts in the front climate control switch
Loss of proper blower control in supported Chevrolet and GMC vans

Installation Notes and Tips

Verify the vehicle year, make, model, and front HVAC configuration before ordering. Fitment includes 1996-2004 Chevrolet Astro and GMC Safari, plus select 1996-2000 Chevrolet Express and GMC Savana vans, and 1996 Chevrolet G30 and GMC G3500 applications. Rear A/C is not included in the listed van assemblies where noted, so confirm the vehicle’s HVAC setup and connector match before installation.

Quality Assurance

Four Seasons is the brand behind the Selector Switch line, and this HVAC blower control switch is cataloged for the specified OE-style replacement applications. Use the part number 37640 to confirm the correct selector switch for your vehicle before purchase.

This part fits 100 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Position	Notes
2004	Chevrolet	Astro	Front	Selector Switch
2004	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2004	GMC	Safari	Front	Selector Switch
2004	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	Chevrolet	Astro	Front	Selector Switch
2003	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003	GMC	Safari	Front	Selector Switch
2003	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	Chevrolet	Astro	Front	Selector Switch
2002	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002	GMC	Safari	Front	Selector Switch
2002	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	Chevrolet	Astro	Front	Selector Switch
2001	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001	GMC	Safari	Front	Selector Switch
2001	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Chevrolet	Astro	Front	Selector Switch
2000	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	Chevrolet	Express 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	Chevrolet	Express 1500	Front	Rear A/C not included in this assembly.; Selector Switch
2000	Chevrolet	Express 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	Chevrolet	Express 2500	Front	Rear A/C not included in this assembly.; Selector Switch
2000	Chevrolet	Express 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	Chevrolet	Express 3500	Front	Rear A/C not included in this assembly.; Selector Switch
2000	GMC	Safari	Front	Selector Switch
2000	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000	GMC	Savana 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	GMC	Savana 1500	Front	Rear A/C not included in this assembly.; Selector Switch
2000	GMC	Savana 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	GMC	Savana 2500	Front	Rear A/C not included in this assembly.; Selector Switch
2000	GMC	Savana 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
2000	GMC	Savana 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	Chevrolet	Astro	Front	Selector Switch
1999	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	Chevrolet	Express 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	Chevrolet	Express 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	Chevrolet	Express 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	Chevrolet	Express 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	Chevrolet	Express 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	Chevrolet	Express 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	GMC	Safari	Front	Selector Switch
1999	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999	GMC	Savana 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	GMC	Savana 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	GMC	Savana 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	GMC	Savana 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1999	GMC	Savana 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1999	GMC	Savana 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	Chevrolet	Astro	Front	Selector Switch
1998	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	Chevrolet	Express 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	Chevrolet	Express 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	Chevrolet	Express 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	Chevrolet	Express 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	Chevrolet	Express 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	Chevrolet	Express 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	GMC	Safari	Front	Selector Switch
1998	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998	GMC	Savana 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	GMC	Savana 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	GMC	Savana 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	GMC	Savana 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1998	GMC	Savana 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1998	GMC	Savana 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	Chevrolet	Astro	Front	Selector Switch
1997	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997	Chevrolet	Express 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	Chevrolet	Express 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	Chevrolet	Express 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	Chevrolet	Express 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	Chevrolet	Express 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	Chevrolet	Express 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	GMC	Safari	Front	Selector Switch
1997	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997	GMC	Savana 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	GMC	Savana 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	GMC	Savana 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	GMC	Savana 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1997	GMC	Savana 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1997	GMC	Savana 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	Chevrolet	Astro	Front	Selector Switch
1996	Chevrolet	Astro	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1996	Chevrolet	Express 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	Chevrolet	Express 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	Chevrolet	Express 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	Chevrolet	Express 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	Chevrolet	Express 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	Chevrolet	Express 3500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	Chevrolet	G30	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	Chevrolet	G30	Front	Rear A/C not included in this assembly.; Selector Switch
1996	GMC	G3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	GMC	G3500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	GMC	Safari	Front	Selector Switch
1996	GMC	Safari	Front	Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1996	GMC	Savana 1500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	GMC	Savana 1500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	GMC	Savana 2500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	GMC	Savana 2500	Front	Rear A/C not included in this assembly.; Selector Switch
1996	GMC	Savana 3500	Front	Blower Motor Switch; w/o Rear AC; Selector Switch
1996	GMC	Savana 3500	Front	Rear A/C not included in this assembly.; Selector Switch
No rows match your filter.

Directly replaces or cross-references 6 part numbers

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Four Seasons — 376401S1412157222616202941A10240SW1463