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

Part Number: 3991431-OER

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

Part Number: 3991431-OER

Original price was: $81.99.Current price is: $80.95.

In Stock

( Inventory updated: 06/06/2026 )

Estimated ship date: 2-3 business days

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

Enhance the cooling efficiency of your classic GM vehicle with the OER¬Æ Authorized 1971-79 Buick, Chevy, Olds, Pontiac 7 Fan Blade Fan. Designed as a direct replacement for the original equipment, this high-quality fan is perfect for restoring the cooling system of your vintage ride. Engineered with precision and manufactured in durable stamped steel, this fan replicates the original design with a 19-1/2″ diameter and 7 blade configuration, ensuring optimal performance and functionality.

Key Features and Benefits

  • Authentic OER¬Æ Reproduction: Manufactured to replacement specifications for various 1971-79 GM models.
  • Durable Construction: Stamped steel design provides longevity and reliability under various driving conditions.
  • Easy Installation: Direct fit for your classic vehicle, making it simple to replace your worn-out fan.
  • Optimal Cooling: Designed to ensure efficient airflow and cooling performance for your engine.
  • Part Number: Replaces original GM part number # 3991431 for an assured fit.

Specifications

  • Dimensions: 2.5″ inside diameter, 4 x 3.25″ bolt pattern

Fitment Information

This fan is compatible with a wide range of models across Chevrolet, GMC, Pontiac, Buick, and Oldsmobile, including but not limited to:

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.)
  • 1973-1974 Chevrolet Nova (with Flex Fan)
  • 1976-1978 Chevrolet Monte Carlo (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)
  • 1977-1979 Pontiac Ventura (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)

Closing Statement

Revitalize your classic GM car with the exceptional 1971-79 Buick, Chevy, Olds, Pontiac 7 Fan Blade Fan. This crucial component not only maintains optimal engine temperatures but also honors the original design aesthetics of your vehicle. Don’t compromise on quality—choose this reliable fan for your restoration project today!

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OER

Original Equipment Reproduction - OER - is the leading manufacturer and distributor of quality classic automotive restoration parts and accessories. OER products are meticulously manufactured to replicate the OEM appearance, quality and fit that meets or exceeds the original factory specifications.

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