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OE Quality
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NGKPart #: 96355
Four Seasons 37639 HVAC Blower Control Switch
97 vehicles fit this part
Select your vehicle to confirm fitment
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Selector Switch
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Not what you need? See all HVAC Blower Control Switch options
HVAC Blower Control Switch for Classic GM Applications
Restore blower speed selection with this Four Seasons Selector Switch, part number 37639. This HVAC blower control switch uses a 5-terminal, male, square connector layout for direct replacement in supported vehicles, including Chevrolet Camaro, Pontiac Firebird, and other GM platforms listed below.
Key Features
- Four Seasons Selector Switch product line
- HVAC blower control switch / blower selector switch
- Male connector with square connector shape
- 5-terminal electrical design
- Direct-fit replacement for select GM HVAC controls
- Part number 37639 for ordering and cross-reference
Detailed Product Overview
Four Seasons 37639 is a blower selector switch used in HVAC control systems to route blower motor speed commands through the dash control assembly. It is specified as a blower-type switch with a male, square connector and five terminals, making it a practical replacement for worn or intermittent HVAC controls in compatible vehicles. This part cross-references A10239 and SW1456 for the same application. The Four Seasons Selector Switch line focuses on replacement HVAC electrical components for vehicles that need accurate control input at the dash.
Compatible With 1982-1992 Chevrolet Camaro, N/A; 1982-1992 Pontiac Firebird, N/A; 1989-1991 Oldsmobile Delta 88, N/A; 1988-1990 Chevrolet Caprice, N/A; 1988 Oldsmobile Cutlass Calais, N/A; 1986-1988 Pontiac Fiero, N/A; 1985-1987 Oldsmobile Calais, N/A; 1985 Chevrolet Citation II, N/A; 1982-1985 Chevrolet S10, N/A; 1983-1985 Chevrolet S10 Blazer, N/A; 1982-1985 GMC S15, N/A; 1983-1985 GMC S15 Jimmy, N/A.
Common Issues This Part Addresses
- Blower speeds that do not respond at the dash control
- Intermittent HVAC fan operation
- Worn or damaged selector switch contacts
- Loss of one or more blower speed settings
- Electrical connection problems at the HVAC control head
Installation Notes and Tips
Verify connector style, terminal count, and vehicle application before installation. This part uses a male, square 5-terminal configuration, so compare the existing switch and harness connector on the vehicle before purchase. For fitment-based searches, this part is commonly sought as a 1982-1992 Chevrolet Camaro blower control switch, a 1982-1992 Pontiac Firebird HVAC selector switch, and a Four Seasons 37639 replacement for select GM HVAC systems.
Quality Assurance
Four Seasons supplies HVAC replacement components for automotive repair applications, and this selector switch is cataloged for specific GM fitments to support accurate part matching. Confirm the vehicle year, make, model, and HVAC control configuration against the listed applications before ordering.
| Brand | NGK |
|---|---|
| Part Number | 96355 |
| Position | Selector Switch |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Ruthenium |
| Electrical Terminal Type | Non-Removable Nut |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Dual Fine Electrode - High Ignitability |
| Hex Size | 5/8 |
| Insulator Height | 50.50 |
| Manufacturer Heat Range | 5 |
| Part Number | LFR5AHX |
| Pre-Gap Size | .044 |
| Reach | 26.5 |
| Resistance | 5000 |
| Seat Type | Flat |
| Stock Number | 96355 |
| Thread Diameter | 14.00 |
This part fits 97 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1992 | Chevrolet | Camaro | N/A | Selector Switch |
| 1992 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1992 | Pontiac | Firebird | N/A | Selector Switch |
| 1992 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1991 | Chevrolet | Camaro | N/A | Selector Switch |
| 1991 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1991 | Oldsmobile | Delta 88 | N/A | Selector Switch |
| 1991 | Oldsmobile | Delta 88 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1991 | Pontiac | Firebird | N/A | Selector Switch |
| 1991 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1990 | Chevrolet | Camaro | N/A | Selector Switch |
| 1990 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1990 | Chevrolet | Caprice | N/A | Selector Switch |
| 1990 | Chevrolet | Caprice | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1990 | Oldsmobile | Delta 88 | N/A | Selector Switch |
| 1990 | Oldsmobile | Delta 88 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1990 | Pontiac | Firebird | N/A | Selector Switch |
| 1990 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1989 | Chevrolet | Camaro | N/A | Selector Switch |
| 1989 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1989 | Chevrolet | Caprice | N/A | Selector Switch |
| 1989 | Chevrolet | Caprice | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1989 | Oldsmobile | Delta 88 | N/A | Selector Switch |
| 1989 | Oldsmobile | Delta 88 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1989 | Pontiac | Firebird | N/A | Selector Switch |
| 1989 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1988 | Chevrolet | Camaro | N/A | Selector Switch |
| 1988 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1988 | Chevrolet | Caprice | N/A | Selector Switch |
| 1988 | Chevrolet | Caprice | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1988 | Oldsmobile | Cutlass Calais | N/A | Selector Switch |
| 1988 | Oldsmobile | Cutlass Calais | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1988 | Pontiac | Fiero | N/A | Selector Switch |
| 1988 | Pontiac | Fiero | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1988 | Pontiac | Firebird | N/A | Selector Switch |
| 1988 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1987 | Chevrolet | Camaro | N/A | Selector Switch |
| 1987 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1987 | Oldsmobile | Calais | N/A | Selector Switch |
| 1987 | Oldsmobile | Calais | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1987 | Pontiac | Fiero | N/A | Selector Switch |
| 1987 | Pontiac | Fiero | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1987 | Pontiac | Firebird | N/A | Selector Switch |
| 1987 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1986 | Chevrolet | Camaro | N/A | Selector Switch |
| 1986 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1986 | Oldsmobile | Calais | N/A | Selector Switch |
| 1986 | Oldsmobile | Calais | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1986 | Pontiac | Fiero | N/A | Selector Switch |
| 1986 | Pontiac | Fiero | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1986 | Pontiac | Firebird | N/A | Selector Switch |
| 1986 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | Chevrolet | Camaro | N/A | Selector Switch |
| 1985 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | Chevrolet | Citation II | N/A | Selector Switch |
| 1985 | Chevrolet | Citation II | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | Chevrolet | S10 | N/A | Selector Switch |
| 1985 | Chevrolet | S10 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | Chevrolet | S10 Blazer | N/A | Selector Switch |
| 1985 | Chevrolet | S10 Blazer | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | GMC | S15 | N/A | Selector Switch |
| 1985 | GMC | S15 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | GMC | S15 Jimmy | N/A | Blower Motor Switch; Selector Switch |
| 1985 | Oldsmobile | Calais | N/A | Selector Switch |
| 1985 | Oldsmobile | Calais | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1985 | Pontiac | Firebird | N/A | Selector Switch |
| 1985 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1984 | Chevrolet | Camaro | N/A | Selector Switch |
| 1984 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1984 | Chevrolet | S10 | N/A | Selector Switch |
| 1984 | Chevrolet | S10 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1984 | Chevrolet | S10 Blazer | N/A | Selector Switch |
| 1984 | Chevrolet | S10 Blazer | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1984 | GMC | S15 | N/A | Selector Switch |
| 1984 | GMC | S15 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1984 | GMC | S15 Jimmy | N/A | Blower Motor Switch; Selector Switch |
| 1984 | Pontiac | Firebird | N/A | Selector Switch |
| 1984 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1983 | Chevrolet | Camaro | N/A | Selector Switch |
| 1983 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1983 | Chevrolet | S10 | N/A | Selector Switch |
| 1983 | Chevrolet | S10 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1983 | Chevrolet | S10 Blazer | N/A | Selector Switch |
| 1983 | Chevrolet | S10 Blazer | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1983 | GMC | S15 | N/A | Selector Switch |
| 1983 | GMC | S15 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1983 | GMC | S15 Jimmy | N/A | Blower Motor Switch; Selector Switch |
| 1983 | Pontiac | Firebird | N/A | Selector Switch |
| 1983 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1982 | Chevrolet | Camaro | N/A | Selector Switch |
| 1982 | Chevrolet | Camaro | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1982 | Chevrolet | S10 | N/A | Selector Switch |
| 1982 | Chevrolet | S10 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1982 | GMC | S15 | N/A | Selector Switch |
| 1982 | GMC | S15 | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; Selector Switch |
| 1982 | Pontiac | Firebird | N/A | Selector Switch |
| 1982 | Pontiac | Firebird | N/A | Prior to purchase, ensure compatibility with vehicle's make, model, and year for HVAC Blower Control Switch.; 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:
96355
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.