DSE Selecta-Speed Wiper Kit (1973 - 1974 Chevrolet / GMC C/K Trucks) - 121633
Bring modern windshield wiper performance to your classic GM Square Body with the Detroit Speed 121633 Selecta-Speed Wiper Kit. Engineered specifically for 1973 - 1974 Chevrolet and GMC C/K trucks, this system replaces limited original-style wiper operation with seven-speed control, including five intermittent delay settings plus dedicated low and high speeds. Whether you are dealing with a light mist, changing rain or a steady downpour, Selecta-Speed gives you the control and convenience expected from a modern wiper system in an application-specific package built for your classic truck.
Detroit Speed builds the 121633 around a compact, low-profile modern OE-style wiper motor that mounts cleanly at the firewall while providing additional clearance around components such as the brake booster and valve covers. A CNC aluminum mount connects the motor to the stock firewall bolt pattern, and the complete wiring harness plugs into the included under-dash wiper control module. The wiper motor connector is already installed on the harness, eliminating the need to pin the connector during installation. Push-button windshield washer functionality adds another modern touch, including automatic three-cycle wiper operation after the washer button is released.
Specifications
- Part Number: 121633
- Manufacturer: Detroit Speed
- Product Type: Selecta-Speed Windshield Wiper Kit
- Application: 1973 - 1974 Chevrolet / GMC C/K Trucks
- Wiper Speeds: Seven
- Delay Settings: Five
- Additional Speeds: Low and High
- Motor Design: Compact Modern OE-Style Wiper Motor
- Motor Mount: CNC Aluminum
- Motor Mounting: Stock Firewall Bolt Pattern
- Wiper Control Module: Included
- Wiring Harness: Included
- Wiper Motor Connector: Pre-Installed on Wiring Harness
- Control Type: Seven-Position Rotary Wiper Switch
- Windshield Washer Control: Push-Button Function
- Washer Pump Compatibility: Optional Detroit Speed 121102 Windshield Washer Pump
- Washer Pump Connection: Weather Pack Connector and Harness for Inline Washer Pump
- Emission Code: 4
Features
- Application-specific Selecta-Speed wiper upgrade for 1973 - 1974 Chevrolet and GMC C/K trucks
- Seven-speed wiper motor provides five intermittent delay settings plus dedicated low and high speeds
- Delivers the performance and convenience of a modern late-model windshield wiper system
- Multiple intermittent settings provide greater control during light and changing rain conditions
- Compact modern OE-style motor creates a clean appearance at the firewall
- Low-profile motor design provides additional clearance around the brake booster, valve covers and other underhood components
- CNC aluminum mount connects the wiper motor to the stock firewall bolt pattern
- Complete wiring harness is included for a streamlined installation
- Wiper motor connector comes pre-installed on the wiring harness, eliminating the need to pin the connector
- Wiper switch and wiring harness connect to the under-dash wiper control module
- Seven-position rotary switch provides convenient control over the available wiper settings
- Push-button windshield washer function works with the optional Detroit Speed 121102 washer pump
- Releasing the washer button automatically cycles the wipers three times
- Wipers then continue operating at the previously selected switch position
- Wiring harness includes a Weather Pack connector and harness for an inline windshield washer pump
Fitment
- 1973 Chevrolet C/K Truck
- 1973 GMC C/K Truck
- 1974 Chevrolet C/K Truck
- 1974 GMC C/K Truck
Fitment Notes
Detroit Speed notes that the current fitment information for the 121633 Selecta-Speed Wiper Kit is not applicable to kits manufactured before 2015.
FAQs
What trucks fit the DSE 121633 Selecta-Speed Wiper Kit?
Detroit Speed specifies part number 121633 for 1973 - 1974 GM Square Body trucks, with its current catalog listing the application as 1973 - 1974 Chevrolet and GMC C/K trucks.
How many wiper settings does the DSE 121633 provide?
The Selecta-Speed system provides seven-speed operation with five intermittent delay settings plus dedicated low and high speeds. This gives your classic GM truck much greater control over wiper operation in changing weather conditions.
Does the DSE 121633 include windshield washer functionality?
Yes. The system includes a push-button windshield washer function for use with an optional inline washer pump. When the washer button is released, the wipers cycle three times and then continue operating at the previously selected switch position.
Get Your Detroit Speed Components from Beefcake Racing
Upgrade your 1973 - 1974 Chevrolet or GMC C/K truck with modern windshield wiper control using the Detroit Speed 121633 Selecta-Speed Wiper Kit from Beefcake Racing. If you have questions about fitment, installation or other Detroit Speed components for your Square Body build, email sales@beefcakeracing.com or call 1-855-827-7223 for assistance.
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