Manufacturing Authentic Products For The Restoration Industry

3991431 - 1971-79 Buick, Chevy, Olds, Pontiac; 7 Fan Blade Fan; 19-1/2"; Black

3991431 - 1971-79 Buick, Chevy, Olds, Pontiac; 7 Fan Blade Fan; 19-1/2"; Black


$74.99 ea


WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

1971-79 Buick, Chevy, Olds, Pontiac; 7 Fan Blade Fan; 19-1/2"; Black

OER® Authorized reproduction of the original 7 blade fan designed for use with a variety of 1971-79 Buick, Chevrolet, Oldsmobile, and Pontiac models as listed. This fan is manufactured in stamped steel to original factory specifications replicating the original fan blade which was installed as original equipment on various GM models with 19-1/2" diameter, 7 blade fan. Replaces original GM part number # 3991431.

Additional Information
  • Note: Measurements: 2.5" inside diameter, 4 x 3.25" bolt pattern
Chevrolet Passenger Car Applications:
  • 1971-1971 Chevrolet Passenger (with 36 Amp Except Police/Taxi)
  • 1971-1974 Chevrolet Impala, Bel Air, Caprice (V8 with C.A.C.)
  • 1971-1974 Chevrolet Taxi/Police (V8 Except C.A.C.)
  • 1975-1975 Chevrolet Impala, Caprice (with 350, 400, 61 Amp Except 454, Police/Taxi)
  • 1975-1975 Chevrolet Chevelle (with 454)
  • 1975-1975 Chevrolet Police/Taxi (Except 61 Amp)
  • 1976-1976 Chevrolet Caprice (V8 with 61 Amp)
  • 1976-1978 Chevrolet Impala (V8 with 61 Amp)
  • 1973-1974 Chevrolet Nova (with Flex Fan)
  • 1975-1975 Chevrolet Nova (with Engine Fan Clutch)
  • 1973-1975 Chevrolet Nova (All with AC Drive)
  • 1976-1979 Chevrolet Nova (350l with AC)
  • 1971-1974 Chevrolet Chevelle (with 307, 350 63 Amp C.A.C.)
  • 1975-1975 Chevrolet Chevelle (with 350, 400, 61 Amp)
  • 1976-1978 Chevrolet Chevelle (V8 with 61 Amp)
  • 1973-1973 Chevrolet El Camino ((with 454 with C.A.C.)
  • 1976-1978 Chevrolet El Camino (V8 with 61 Amp)
  • 1976-1978 Chevrolet Monte Carlo (V8 with 61 Amp)
Chevrolet / GMC Truck Applications:
  • 1968-1970 Chevrolet Pickup C10-30 with AC, Heavy Duty Cooling, 396)
  • 1971-1972 Chevrolet PickupC30 D-D, with MHC 400)
  • 1971-1972 Chevrolet Pickup, Blazer, Suburban (with 400)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (2 WD 454 Except C.A.C.)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (4 WD 305, 307, 350 with C.A.C.)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban( 2 WD 305, 307, 350 with C.A.C.)
  • 1975-1978 Chevrolet (4 WD, K1 400 Except C.A.C.)
  • 1978-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (C1, Diesel)
  • 1975-1975 Chevrolet Van G2-3, (400 2nd Design)
  • 1975-1978 Chevrolet Van G1-2-3 (with A/T, with C.A.C HD400)
  • 1976-1978 Chevrolet Van G1-2-3, (400)
  • 1979-1979 Chevrolet Van G1-2-3,(250, 305 with A/T, HDC)
  • 1979-1979 Chevrolet Van G1-2-3, (400)
GMC Sprint Applications:
  • 1975-1977 GMC Sprint (V8 with 61 Amp)
Pontiac Applications:
  • 1976-1976 Pontiac A/B/G Models (350, 400, 455, with AC)
  • 1977-1977 Pontiac A Models (305, 350l, with AC)
  • 1977-1977 Pontiac A/G Models (301, 350, 400 with AC)
  • 1977-1979 Pontiac Ventura (305, 350l, with AC)
  • 1977-1979 Pontiac Phoenix (305, 350l, with AC)
Buick Applications:
  • 1977-1977 Buick A Bodies (305U, 350l with AC)
  • 1978-1979 Buick X Bodies (305, 350 with AC, HDC)
Oldsmobile Applications:
  • 1977-1979 Oldsmobile Omega (with 305, 350l with AC)

Product Specifications

Shipping Dimensions
  • Weight: 7 Lbs
  • Dimensions: L: 20" x W: 20" x H: 3"
  • Ship Type: Standard |
Additional Information
  • Note: Measurements: 2.5" inside diameter, 4 x 3.25" bolt pattern
Product Information
1971-79 Buick, Chevy, Olds, Pontiac; 7 Fan Blade Fan; 19-1/2"; Black

OER® Authorized reproduction of the original 7 blade fan designed for use with a variety of 1971-79 Buick, Chevrolet, Oldsmobile, and Pontiac models as listed. This fan is manufactured in stamped steel to original factory specifications replicating the original fan blade which was installed as original equipment on various GM models with 19-1/2" diameter, 7 blade fan. Replaces original GM part number # 3991431.

Additional Information
  • Note: Measurements: 2.5" inside diameter, 4 x 3.25" bolt pattern
Chevrolet Passenger Car Applications:
  • 1971-1971 Chevrolet Passenger (with 36 Amp Except Police/Taxi)
  • 1971-1974 Chevrolet Impala, Bel Air, Caprice (V8 with C.A.C.)
  • 1971-1974 Chevrolet Taxi/Police (V8 Except C.A.C.)
  • 1975-1975 Chevrolet Impala, Caprice (with 350, 400, 61 Amp Except 454, Police/Taxi)
  • 1975-1975 Chevrolet Chevelle (with 454)
  • 1975-1975 Chevrolet Police/Taxi (Except 61 Amp)
  • 1976-1976 Chevrolet Caprice (V8 with 61 Amp)
  • 1976-1978 Chevrolet Impala (V8 with 61 Amp)
  • 1973-1974 Chevrolet Nova (with Flex Fan)
  • 1975-1975 Chevrolet Nova (with Engine Fan Clutch)
  • 1973-1975 Chevrolet Nova (All with AC Drive)
  • 1976-1979 Chevrolet Nova (350l with AC)
  • 1971-1974 Chevrolet Chevelle (with 307, 350 63 Amp C.A.C.)
  • 1975-1975 Chevrolet Chevelle (with 350, 400, 61 Amp)
  • 1976-1978 Chevrolet Chevelle (V8 with 61 Amp)
  • 1973-1973 Chevrolet El Camino ((with 454 with C.A.C.)
  • 1976-1978 Chevrolet El Camino (V8 with 61 Amp)
  • 1976-1978 Chevrolet Monte Carlo (V8 with 61 Amp)
Chevrolet / GMC Truck Applications:
  • 1968-1970 Chevrolet Pickup C10-30 with AC, Heavy Duty Cooling, 396)
  • 1971-1972 Chevrolet PickupC30 D-D, with MHC 400)
  • 1971-1972 Chevrolet Pickup, Blazer, Suburban (with 400)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (2 WD 454 Except C.A.C.)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (4 WD 305, 307, 350 with C.A.C.)
  • 1973-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban( 2 WD 305, 307, 350 with C.A.C.)
  • 1975-1978 Chevrolet (4 WD, K1 400 Except C.A.C.)
  • 1978-1978 Chevrolet Pickup/Blazer/Jimmy/Suburban (C1, Diesel)
  • 1975-1975 Chevrolet Van G2-3, (400 2nd Design)
  • 1975-1978 Chevrolet Van G1-2-3 (with A/T, with C.A.C HD400)
  • 1976-1978 Chevrolet Van G1-2-3, (400)
  • 1979-1979 Chevrolet Van G1-2-3,(250, 305 with A/T, HDC)
  • 1979-1979 Chevrolet Van G1-2-3, (400)
GMC Sprint Applications:
  • 1975-1977 GMC Sprint (V8 with 61 Amp)
Pontiac Applications:
  • 1976-1976 Pontiac A/B/G Models (350, 400, 455, with AC)
  • 1977-1977 Pontiac A Models (305, 350l, with AC)
  • 1977-1977 Pontiac A/G Models (301, 350, 400 with AC)
  • 1977-1979 Pontiac Ventura (305, 350l, with AC)
  • 1977-1979 Pontiac Phoenix (305, 350l, with AC)
Buick Applications:
  • 1977-1977 Buick A Bodies (305U, 350l with AC)
  • 1978-1979 Buick X Bodies (305, 350 with AC, HDC)
Oldsmobile Applications:
  • 1977-1979 Oldsmobile Omega (with 305, 350l with AC)


  • Product #:
  • SHIP TYPE:
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

This product fits the following vehicle applications. Click to view individual years.

Shipping Dimensions