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Four Seasons 37640 HVAC Blower Control Switch - FrontOE Quality 60-Day Returns
Four Seasons 37640 HVAC Blower Control Switch - Front - view 1
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Four Seasons 37640 HVAC Blower Control Switch - Front - view 4
Four Seasons 37640 HVAC Blower Control Switch - Front - view 5
Part #: BD8860

Four Seasons 37640 HVAC Blower Control Switch - Front

Selector Switch
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Reliable HVAC Blower Control for Chevrolet and GMC Vehicles

The Four Seasons Selector Switch 37640 is designed to provide precise control over the HVAC blower system in select Chevrolet and GMC models. Engineered with a male, round connector and a single terminal, this blower control switch ensures consistent performance and compatibility with your vehicle's HVAC system.

  • Compatible with Chevrolet Astro, Express 1500/2500/3500, and GMC G30, Safari, Savana 1500/2500/3500 models
  • Part number 37640 for accurate identification and fitment
  • Male connector with a round shape for secure electrical connection
  • Single terminal design optimized for blower control applications
  • Part of the Four Seasons Selector Switch product line, focused on HVAC switch solutions

About the Four Seasons Selector Switch Product Line

The Selector Switch line by Four Seasons specializes in HVAC switches designed to regulate blower functions within vehicle climate control systems. This product line emphasizes compatibility and durability, providing reliable switch-selector and blower control components tailored for specific vehicle makes and models. The 37640 blower control switch is a precise fit for Chevrolet and GMC vans and trucks, ensuring seamless integration with existing HVAC systems.

Product Details and Specifications

The Four Seasons 37640 blower control switch features a male connector with a round shape, facilitating a secure and stable electrical connection. With a single terminal, this switch is engineered specifically for blower control functions, allowing drivers to adjust the HVAC blower speed effectively. Its design supports the electrical requirements of the HVAC system in Chevrolet Astro, Express series, and GMC G30, Safari, and Savana models, ensuring proper fit and function.

Common Applications and Problem Solving

  • Restores blower control functionality in Chevrolet Astro and GMC Savana HVAC systems
  • Replaces faulty or worn blower control switches causing inconsistent blower speeds
  • Addresses HVAC blower selector switch failures in Chevrolet Express and GMC Safari vans
  • Improves climate control responsiveness in vehicles with aging HVAC components
  • Ensures reliable blower operation for passenger comfort and system efficiency

Installation Notes and Tips

  • Verify vehicle compatibility with Chevrolet Astro, Express 1500/2500/3500, GMC G30, Safari, and Savana 1500/2500/3500 before installation
  • Ensure the male round connector aligns properly with the vehicle’s wiring harness
  • Disconnect the battery before replacing the blower control switch to prevent electrical shorts
  • Handle the switch carefully to avoid damage to the terminal and connector
  • Test blower operation after installation to confirm proper function

Quality Assurance and Warranty

Four Seasons maintains strict quality control standards for the Selector Switch product line, including part number 37640. Each switch undergoes testing to meet OEM specifications for fit and function. While specific warranty details may vary, Four Seasons typically offers coverage against manufacturing defects to ensure customer confidence in the product’s reliability and durability.

BrandDuraGo
Part NumberBD8860
PositionSelector Switch
ABS Tone Ring IncludedNo
Bolt Circle Diameter4.5
Bolt Circle Diameter114.3
Bolt Hole Diameter0.65
Bolt Hole Diameter16.4
Bolt Hole Quantity5
Brake Surface Width2.93
Brake Surface Width74.4
Center Hole Diameter2.83
Center Hole Diameter72
ConstructionComposite
MaterialCast Iron / Steel Top
Maximum Brake Diameter (Discard)11.09
Maximum Brake Diameter (Discard)281.69
Nominal Drum Diameter11
Nominal Drum Diameter279.4
Outer Cooling FinsYes
Outside Diameter13.56
Outside Diameter344.4
Overall Height4.44
Overall Height112.8
Rust Resistant CoatingNo

This part fits 100 vehicles. Search below:

YearMakeModelPositionNotes
2004ChevroletAstroFrontSelector Switch
2004ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2004GMCSafariFrontSelector Switch
2004GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003ChevroletAstroFrontSelector Switch
2003ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2003GMCSafariFrontSelector Switch
2003GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002ChevroletAstroFrontSelector Switch
2002ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2002GMCSafariFrontSelector Switch
2002GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001ChevroletAstroFrontSelector Switch
2001ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2001GMCSafariFrontSelector Switch
2001GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000ChevroletAstroFrontSelector Switch
2000ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000ChevroletExpress 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000ChevroletExpress 1500FrontRear A/C not included in this assembly.; Selector Switch
2000ChevroletExpress 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000ChevroletExpress 2500FrontRear A/C not included in this assembly.; Selector Switch
2000ChevroletExpress 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000ChevroletExpress 3500FrontRear A/C not included in this assembly.; Selector Switch
2000GMCSafariFrontSelector Switch
2000GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
2000GMCSavana 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000GMCSavana 1500FrontRear A/C not included in this assembly.; Selector Switch
2000GMCSavana 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000GMCSavana 2500FrontRear A/C not included in this assembly.; Selector Switch
2000GMCSavana 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
2000GMCSavana 3500FrontRear A/C not included in this assembly.; Selector Switch
1999ChevroletAstroFrontSelector Switch
1999ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999ChevroletExpress 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999ChevroletExpress 1500FrontRear A/C not included in this assembly.; Selector Switch
1999ChevroletExpress 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999ChevroletExpress 2500FrontRear A/C not included in this assembly.; Selector Switch
1999ChevroletExpress 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999ChevroletExpress 3500FrontRear A/C not included in this assembly.; Selector Switch
1999GMCSafariFrontSelector Switch
1999GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1999GMCSavana 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999GMCSavana 1500FrontRear A/C not included in this assembly.; Selector Switch
1999GMCSavana 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999GMCSavana 2500FrontRear A/C not included in this assembly.; Selector Switch
1999GMCSavana 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1999GMCSavana 3500FrontRear A/C not included in this assembly.; Selector Switch
1998ChevroletAstroFrontSelector Switch
1998ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998ChevroletExpress 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998ChevroletExpress 1500FrontRear A/C not included in this assembly.; Selector Switch
1998ChevroletExpress 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998ChevroletExpress 2500FrontRear A/C not included in this assembly.; Selector Switch
1998ChevroletExpress 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998ChevroletExpress 3500FrontRear A/C not included in this assembly.; Selector Switch
1998GMCSafariFrontSelector Switch
1998GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1998GMCSavana 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998GMCSavana 1500FrontRear A/C not included in this assembly.; Selector Switch
1998GMCSavana 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998GMCSavana 2500FrontRear A/C not included in this assembly.; Selector Switch
1998GMCSavana 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1998GMCSavana 3500FrontRear A/C not included in this assembly.; Selector Switch
1997ChevroletAstroFrontSelector Switch
1997ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997ChevroletExpress 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997ChevroletExpress 1500FrontRear A/C not included in this assembly.; Selector Switch
1997ChevroletExpress 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997ChevroletExpress 2500FrontRear A/C not included in this assembly.; Selector Switch
1997ChevroletExpress 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997ChevroletExpress 3500FrontRear A/C not included in this assembly.; Selector Switch
1997GMCSafariFrontSelector Switch
1997GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1997GMCSavana 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997GMCSavana 1500FrontRear A/C not included in this assembly.; Selector Switch
1997GMCSavana 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997GMCSavana 2500FrontRear A/C not included in this assembly.; Selector Switch
1997GMCSavana 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1997GMCSavana 3500FrontRear A/C not included in this assembly.; Selector Switch
1996ChevroletAstroFrontSelector Switch
1996ChevroletAstroFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1996ChevroletExpress 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996ChevroletExpress 1500FrontRear A/C not included in this assembly.; Selector Switch
1996ChevroletExpress 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996ChevroletExpress 2500FrontRear A/C not included in this assembly.; Selector Switch
1996ChevroletExpress 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996ChevroletExpress 3500FrontRear A/C not included in this assembly.; Selector Switch
1996ChevroletG30FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996ChevroletG30FrontRear A/C not included in this assembly.; Selector Switch
1996GMCG3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996GMCG3500FrontRear A/C not included in this assembly.; Selector Switch
1996GMCSafariFrontSelector Switch
1996GMCSafariFrontPrior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch
1996GMCSavana 1500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996GMCSavana 1500FrontRear A/C not included in this assembly.; Selector Switch
1996GMCSavana 2500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996GMCSavana 2500FrontRear A/C not included in this assembly.; Selector Switch
1996GMCSavana 3500FrontBlower Motor Switch; w/o Rear AC; Selector Switch
1996GMCSavana 3500FrontRear A/C not included in this assembly.; Selector Switch

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

This part directly replaces or is cross-referenced with the following part numbers:

123630162953601878860AX8860BD60187P2953PDR0365

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

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