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  • Part #: HY3647
  • Mfr #: 3647
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1988-2000 GMC K2500 Auxiliary Fan Control Unit - Hayden - Direct fit

  • Product Details
  • 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 GMC K2500 submodels
  • 1995-2000: Sierra SL; 8 Cyl 5.7L; "CNG"
  • 1995-2000: Sierra SL; 8 Cyl 5.7L; "GAS"
  • 1995-2000: Sierra SLT; 8 Cyl 5.7L; "CNG"
  • 1995-2000: Sierra SLT; 8 Cyl 5.7L; "GAS"
  • 1994-2000: Sierra SL; 8 Cyl 6.5L;
  • 1994-2000: Sierra SLT; 8 Cyl 6.5L;
  • 1992-2000: Sierra SLE; 8 Cyl 5.7L; "CNG"
  • 1992-2000: Sierra SLE; 8 Cyl 5.7L; "GAS"
  • 1992-2000: Sierra SLE; 8 Cyl 6.5L;
  • 1994-1998: Sierra SL; 8 Cyl 5.0L;
  • 1994-1998: Sierra SLT; 8 Cyl 5.0L;
  • 1988-1998: Sierra SLE; 8 Cyl 5.0L;
  • 1994-1995: Sierra SL; 6 Cyl 4.3L;
  • 1988-1995: Sierra SLE; 6 Cyl 4.3L;
  • 1994-1994: Sierra SL; 8 Cyl 5.7L;
  • 1994-1994: Sierra SLT; 8 Cyl 5.7L;
  • 1988-1994: Sierra SLE; 8 Cyl 5.7L;
  • 1992-1993: Sierra SLX; 8 Cyl 5.7L; "CNG"
  • 1992-1993: Sierra SLX; 8 Cyl 5.7L; "GAS"
  • 1992-1993: Sierra SLX; 8 Cyl 6.5L;
  • 1992-1993: Sierra; 8 Cyl 5.7L; "CNG"
  • 1992-1993: Sierra; 8 Cyl 5.7L; "GAS"
  • 1992-1993: Sierra; 8 Cyl 6.5L;
  • 1988-1993: Sierra SLE; 8 Cyl 6.2L;
  • 1988-1993: Sierra SLX; 6 Cyl 4.3L;
  • 1988-1993: Sierra SLX; 8 Cyl 5.0L;
  • 1988-1993: Sierra SLX; 8 Cyl 6.2L;
  • 1988-1993: Sierra; 6 Cyl 4.3L;
  • 1988-1993: Sierra; 8 Cyl 5.0L;
  • 1988-1993: Sierra; 8 Cyl 6.2L;
  • 1988-1991: Sierra SLX; 8 Cyl 5.7L;
  • 1988-1991: Sierra; 8 Cyl 5.7L;
  • 1982-1986: Base; 8 Cyl 6.2L;
  • 1982-1986: High Sierra; 8 Cyl 6.2L;
  • 1982-1986: Sierra Classic; 8 Cyl 6.2L;
  • 1979-1986: Base; 8 Cyl 5.7L;
  • 1979-1986: High Sierra; 8 Cyl 5.7L;
  • 1979-1986: Sierra Classic; 8 Cyl 5.7L;
  • 1985-1985: Base; 6 Cyl 4.3L;
  • 1985-1985: High Sierra; 6 Cyl 4.3L;
  • 1985-1985: Sierra Classic; 6 Cyl 4.3L;
  • 1983-1984: Base; 6 Cyl 4.8L;
  • 1983-1984: High Sierra; 6 Cyl 4.8L;
  • 1983-1984: Sierra Classic; 6 Cyl 4.8L;
  • 1982-1982: Sierra Grande; 8 Cyl 6.2L;
  • 1979-1982: Sierra Grande; 8 Cyl 5.7L;
  • 1979-1980: Base; 8 Cyl 6.6L;
  • 1979-1980: High Sierra; 8 Cyl 6.6L;
  • 1979-1980: Sierra Classic; 8 Cyl 6.6L;
  • 1979-1980: Sierra Grande; 8 Cyl 6.6L;