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  • Part #: HY3647
  • Mfr #: 3647
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1975-1986 Chevrolet K20 Auxiliary Fan Control Unit - Hayden - Direct fit

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  • Manufacturer Info
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  • Fitment Info
HAYDEN ADJUSTABLE THERMOSTATIC FAN CONTROL KIT -- 160-210 degrees Fahrenheit adjustment range, dual fan, push-in probe sending unit style; Includes sending unit, relay, wiring harness, manual override switch, and air conditioning relay; Allows your electric fan to turn on and off at certain temperatures; Compatible with own fans and OE cooling fans.
  • Product Fit: Direct fit
  • Quantity Sold: Sold individually
  • Anticipated Ship Out Time: 1-2 business days
  • Warranty: 1-year or 12,000-mile Hayden limited warranty
This product fits the following Chevrolet K20 submodels
  • 1986-1986: Custom; 8 Cyl 5.7L;
  • 1982-1986: Custom; 8 Cyl 6.2L;
  • 1982-1986: Scottsdale; 8 Cyl 6.2L;
  • 1982-1986: Silverado; 8 Cyl 6.2L;
  • 1981-1986: Custom; 6 Cyl 4.8L;
  • 1975-1986: Scottsdale; 6 Cyl 4.8L;
  • 1975-1986: Scottsdale; 8 Cyl 5.7L;
  • 1975-1986: Silverado; 6 Cyl 4.8L;
  • 1975-1986: Silverado; 8 Cyl 5.7L;
  • 1985-1985: Custom; 6 Cyl 4.3L;
  • 1985-1985: Custom; 8 Cyl 5.0L;
  • 1985-1985: Scottsdale; 6 Cyl 4.3L;
  • 1985-1985: Silverado; 6 Cyl 4.3L;
  • 1981-1985: Custom; 8 Cyl 5.7L; "DIESEL"
  • 1981-1985: Custom; 8 Cyl 5.7L; "GAS"
  • 1980-1985: Scottsdale; 8 Cyl 5.7L; "DIESEL"
  • 1980-1985: Scottsdale; 8 Cyl 5.7L; "GAS"
  • 1980-1985: Silverado; 8 Cyl 5.7L; "DIESEL"
  • 1980-1985: Silverado; 8 Cyl 5.7L; "GAS"
  • 1977-1985: Scottsdale; 8 Cyl 5.0L;
  • 1977-1985: Silverado; 8 Cyl 5.0L;
  • 1981-1981: Deluxe; 6 Cyl 4.8L;
  • 1981-1981: Deluxe; 8 Cyl 5.7L; "DIESEL"
  • 1981-1981: Deluxe; 8 Cyl 5.7L; "GAS"
  • 1980-1980: Cheyenne; 8 Cyl 5.7L; "DIESEL"
  • 1980-1980: Cheyenne; 8 Cyl 5.7L; "GAS"
  • 1980-1980: Custom Deluxe; 8 Cyl 5.7L; "DIESEL"
  • 1980-1980: Custom Deluxe; 8 Cyl 5.7L; "GAS"
  • 1977-1980: Cheyenne; 8 Cyl 5.0L;
  • 1977-1980: Custom Deluxe; 8 Cyl 5.0L;
  • 1976-1980: Cheyenne; 8 Cyl 7.4L;
  • 1976-1980: Custom Deluxe; 8 Cyl 7.4L;
  • 1976-1980: Scottsdale; 8 Cyl 7.4L;
  • 1976-1980: Silverado; 8 Cyl 7.4L;
  • 1975-1980: Cheyenne; 6 Cyl 4.1L;
  • 1975-1980: Cheyenne; 6 Cyl 4.8L;
  • 1975-1980: Custom Deluxe; 6 Cyl 4.1L;
  • 1975-1980: Custom Deluxe; 6 Cyl 4.8L;
  • 1975-1980: Scottsdale; 6 Cyl 4.1L;
  • 1975-1980: Silverado; 6 Cyl 4.1L;
  • 1975-1979: Cheyenne; 8 Cyl 5.7L;
  • 1975-1979: Custom Deluxe; 8 Cyl 5.7L;