Proform 66509 6-3/4 In. Diameter for Select Checker Marathon, Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Pickup, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C20, Chevrolet C20

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Load image into Gallery viewer, Proform 66509 6-3/4 In. Diameter for Select Checker Marathon, Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Pickup, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C20, Chevrolet C20

Proform 66509 6-3/4 In. Diameter for Select Checker Marathon, Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Pickup, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C20, Chevrolet C20

Name: Proform 66509 6-3/4 In. Diameter for Select Checker Marathon, Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Pickup, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C20, Chevrolet C20
Brand: Proform
Price: 152.99 CAD
Availability: InStock

by Proform

• SKU: ds_BCHW_66509

• Product Type: Engine Harmonic Balancer

2 sold in last 8 days

$152.99

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Guaranteed Fitment

Always the correct part

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Performance matched parts

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Fits Chevy small and big block engines. These are brand-new OE replacement harmonic balancers. Affordable pricing eliminates the need to clean your old stock balancer. Enhance your balancer by adding the patented balancer covers.

100% New OEM Replacement Unit

Fits: 1968 Checker Marathon, 1968 Chevrolet Bel Air, 1968 Chevrolet Biscayne, 1987-1994 Chevrolet Blazer, 1984-1986 Chevrolet C10, 1968 Chevrolet C10 Pickup, 1968-1986 Chevrolet C10 Suburban, 1988-1995 Chevrolet C1500, 1992-1995 Chevrolet C1500 Suburban, 1984-1986 Chevrolet C20, 1968 Chevrolet C20 Pickup, 1984-1986 Chevrolet C20 Suburban, 1988-1995 Chevrolet C2500, 1992-1995 Chevrolet C2500 Suburban, 1984-1986 Chevrolet C30, 1968 Chevrolet C30 Pickup, 1988-1995 Chevrolet C3500, 1991-1995 Chevrolet C3500HD, 1968-1992 Chevrolet Camaro, 1968-1988 Chevrolet Caprice, 1965-1966 Chevrolet Chevy II, 1968-1991 Chevrolet Corvette, 1968 Chevrolet El Camino, 1984-1993 Chevrolet G10, 1984-1995 Chevrolet G20, 1984-1995 Chevrolet G30, 1993-1995 Chevrolet GP3500, 1964-1985 Chevrolet Impala, 1984-1986 Chevrolet K10, 1968 Chevrolet K10 Pickup, 1968-1986 Chevrolet K10 Suburban, 1988-1995 Chevrolet K1500, 1992-1995 Chevrolet K1500 Suburban, 1984-1986 Chevrolet K20, 1968 Chevrolet K20 Pickup, 1968-1986 Chevrolet K20 Suburban, 1988-1995 Chevrolet K2500, 1992-1995 Chevrolet K2500 Suburban, 1984-1986 Chevrolet K30, 1968 Chevrolet K30 Pickup, 1988-1995 Chevrolet K3500, 1984-1986 Chevrolet K5 Blazer, 1984-1989 Chevrolet P20, 1984-1995 Chevrolet P30, 1987 Chevrolet R10, 1987-1988 Chevrolet R10 Suburban, 1989-1991 Chevrolet R1500 Suburban, 1987-1988 Chevrolet R20, 1987-1988 Chevrolet R20 Suburban, 1989 Chevrolet R2500, 1989-1991 Chevrolet R2500 Suburban, 1987-1988 Chevrolet R30, 1989-1991 Chevrolet R3500, 1995 Chevrolet Tahoe, 1987 Chevrolet V10, 1987-1988 Chevrolet V10 Suburban, 1989-1991 Chevrolet V1500 Suburban, 1987 Chevrolet V20, 1987-1988 Chevrolet V20 Suburban, 1989-1991 Chevrolet V2500 Suburban, 1987-1988 Chevrolet V30, 1989-1991 Chevrolet V3500, 1993 Excalibur Limited, 1986-1989 Excalibur Phaeton, 1968 GMC C15/C1500 Pickup, 1968 GMC C15/C1500 Suburban, 1984-1995 GMC C1500, 1984-1995 GMC C1500 Suburban, 1968 GMC C25/C2500 Pickup, 1968 GMC C25/C2500 Suburban, 1984-1995 GMC C2500, 1984-1995 GMC C2500 Suburban, 1968 GMC C35/C3500 Pickup, 1984-1995 GMC C3500, 1991-1995 GMC C3500HD, 1967 GMC G15/G1500 Van, 1984-1993 GMC G1500, 1967 GMC G25/G2500 Van, 1984-1995 GMC G2500, 1984-1995 GMC G3500, 1984-1991 GMC Jimmy, 1968 GMC K15/K1500 Pickup, 1968 GMC K15/K1500 Suburban, 1984-1995 GMC K1500, 1984-1995 GMC K1500 Suburban, 1968 GMC K25/K2500 Pickup, 1968 GMC K25/K2500 Suburban, 1984-1995 GMC K2500, 1984-1995 GMC K2500 Suburban, 1968 GMC K35/K3500 Pickup, 1984-1995 GMC K3500, 1967 GMC P15/P1500 Van, 1967 GMC P25/P2500 Van, 1984-1989 GMC P2500, 1967 GMC P35/P3500 Van, 1984-1995 GMC P3500, 1987 GMC R1500, 1987-1991 GMC R1500 Suburban, 1987-1989 GMC R2500, 1987-1991 GMC R2500 Suburban, 1987-1991 GMC R3500, 1987 GMC V1500, 1987-1991 GMC V1500 Suburban, 1987 GMC V2500, 1987-1991 GMC V2500 Suburban, 1987-1991 GMC V3500, 1992-1995 GMC Yukon, 1987-1992 Pontiac Firebird

Please review Specifications and the detailed fitment table for notes and exceptions.

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Proform 66509 6-3/4 In. Diameter for Select Checker Marathon, Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet C10, Chevrolet C10 Pickup, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C1500 Suburban, Chevrolet C20, Chevrolet C20

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Do you offer wholesale or jobber pricing?

Yes. Wholesale pricing is available for legitimate businesses that provide a valid business number or equivalent proof. Ongoing purchase volume is required to maintain discount eligibility. One-time personal buyers aren’t eligible.

Will this part fit my vehicle?

If a product page clearly lists fitment for your vehicle and the description leaves no reasonable doubt, we’ll cover the cost of return if it doesn’t fit. Exclusions apply if prior modifications cause the issue. When browsing self-serve, you’re responsible for confirming compatibility by checking manufacturer fitment data and notes. If unsure, contact us before ordering and we’ll verify it for you.

Do you offer technical support or installation advice?

We help where possible on a case-by-case basis. Most manufacturers include detailed instructions and tech support contacts. Because our catalog spans hundreds of brands, we can’t provide every torque spec or procedure, but we’ll connect you with the manufacturer if needed.

Do you offer price matching?

We don’t guarantee price matching, but we’re happy to review a legitimate in-stock offer from another Canadian retailer. The comparison must include all costs such as product price, shipping, taxes, and fees, and the item must be identical and available for immediate purchase. We won’t lose money to match unsustainable or out-of-stock pricing.

Can I exchange an item?

Yes. In-store exchanges happen on the spot when stock is available. For shipped orders, the original item must be returned first. Once received and inspected, we can issue a store credit toward the correct part or replacement. We can’t send a second item while the first is still in your possession without payment for both.

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