Dayco 15615 Accessory Drive Belt

Dayco 15615 Accessory Drive Belt

The Dayco 15615 accessory drive belt is a top-cog, synthetic rubber compound belt built for accessory drive systems that run the fan and air conditioning compressor. With a 61.50-inch effective length, 62.07-inch outside circumference, and .44-inch top width, it is sized for specific classic GM and Buick applications that require accurate belt fitment.

• Accessory drive belt for fan and air conditioning applications
• Synthetic rubber compound construction for dependable belt performance
• Top-cog design helps the belt flex around pulleys
• Black finish with a .44-inch top width
• 61.50-inch effective length and 62.07-inch outside circumference
• Built to SAE J636 and SAE J637 standards
• Operating temperature range: -35 to 175 degrees

Detailed Product Overview

Dayco 15615 is an accessory drive belt for vehicles that use a narrow, cogged belt profile in the accessory drive system. The 36-degree angle, synthetic rubber compound, and top-cog construction support consistent pulley engagement in applications such as 1967-1979 Buick LeSabre, 1968-1968 Chevrolet Impala, and 1977-1977 Oldsmobile Toronado. This Dayco 15615 belt is also listed for multiple Chevrolet C10, C20, K10, and K20 Suburban configurations with air conditioning.

This part cross-references Duralast 15615 and Motorcraft JB-622 for the same application.

What This Belt Helps Address

• Squealing or slipping accessory drive belt noise
• Loss of fan drive or air conditioning compressor drive
• Cracked, glazed, or worn belt surfaces
• Incorrect belt length on classic Buick, Chevrolet, and Oldsmobile applications
• Reduced accessory performance caused by belt wear

Installation Notes and Tips

Verify pulley diameter, accessory layout, and engine configuration before installation. This belt is listed for fan and air conditioning positions, including fan, air conditioning, and air pump on the 1977 Oldsmobile Toronado. Confirm the vehicle’s original belt length and pulley setup against the fitment notes, especially on applications marked with specific pulley sizes such as 5 1/2-inch and 5 7/8-inch pulleys.

• Fits 1978-1979 Buick LeSabre, Fan and Air Conditioning, w/o A.P., w/A.C., Axial Long Body Comp.
• Fits 1978 Buick Riviera, Fan and Air Conditioning, w/o A.P., w/A.C., Axial Long Body Comp.
• Fits 1974 Buick Century, Air Conditioning, 5 7/8 In. Pulley
• Fits 1973 Buick LeSabre, Fan and Air Conditioning, 5 7/8 In. Pulley
• Fits 1972 Buick Skylark, Air Conditioning, 5 1/2 In. Pulley
• Fits 1969-1970 Buick LeSabre, Fan and Air Conditioning
• Fits 1969 Chevrolet C10 Suburban, Air Conditioning
• Fits 1968 Chevrolet Camaro, Fan and Air Conditioning
• Fits 1968 Chevrolet Impala, Air Conditioning
• Fits 1967 Chevrolet Bel Air, Fan and Air Conditioning
• Fits 1977 Oldsmobile Toronado, Fan, Air Conditioning and Air Pump

Quality Assurance

Dayco manufactures this belt to SAE J636 and SAE J637 standards, supporting consistent dimensional and performance requirements for accessory drive service. The part number 15615 is also referenced across multiple OE and aftermarket listings for classic Buick, Chevrolet, Oldsmobile, Pontiac, and related applications.