Home› Belts and Cooling > Accessory Drive Belt System Components› Dayco 15620 Accessory Drive Belt
Dayco 15620 Accessory Drive BeltOE Quality 60-Day Returns
Dayco 15620 Accessory Drive Belt - view 1
Dayco 15620 Accessory Drive Belt - view 2
Dayco 15620 Accessory Drive Belt - view 3
Dayco 15620 Accessory Drive Belt - view 4
Part #: 15620

Dayco 15620 Accessory Drive Belt

Fan and Alternator
⚙️ 124 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$21.95Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: International, Buick, Oldsmobile, Pontiac, Cadillac, and Plymouth, Scout II, Century, Regal, Skylark, Custom Cruiser, Cutlass, Cutlass Salon, Cutlass Supreme, Delta 88, Omega, Bonneville, Catalina, Grand Safari, Laurentian, Phoenix, Ventura, Electra, Estate Wagon, LeSabre, Riviera, Cutlass Tiara, Grand LeMans, LeMans, Apollo, Vista Cruiser, Centurion, GS 455, M1100, M1200, M800, M800 Post Office, MA1200, Scout, M800 Navy, 442, 98, Delmont 88, Gran Sport, Wildcat, Dynamic 88, F85, Grand Prix, GTO, Tempest, Jetstar 88, Super 88, DeVille, Eldorado, Series 60 Fleetwood, Series 62, Series 75 Fleetwood, Chieftain, Super Chief, 88, Belvedere, Fury, Plaza, and Savoy
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Accessory Drive Belt options

Overview of Dayco Accessory Drive Belt 15620

The Dayco 15620 accessory drive belt is engineered for reliable performance in select Buick, Cadillac, Oldsmobile, and Pontiac vehicles. Constructed from a durable synthetic rubber compound, this belt is designed to meet the demands of various classic and modern models, ensuring consistent operation under a range of temperatures.

  • Material: Synthetic rubber compound for durability and flexibility
  • Top width: 0.44 inches for precise fitment
  • Effective length: Approximately 62 inches (1574.80 mm)
  • Outside circumference: Approximately 62.57 inches (1589.28 mm)
  • Belt construction: Top cog design for improved grip and reduced slippage
  • Operating temperature range: -37.2°C to 79.4°C (-35°F to 175°F)
  • Complies with SAE J636 and SAE J637 standards
  • Color: Black
  • Angle: 36 degrees for optimal alignment

Detailed Product Description

The Dayco 15620 accessory drive belt is specifically designed to provide reliable power transmission for accessory components in a range of Buick, Cadillac, Oldsmobile, and Pontiac vehicles. Its synthetic rubber compound construction offers resistance to wear, heat, and environmental factors, maintaining belt integrity over time. The top cog belt construction enhances flexibility and grip on pulleys, reducing the risk of slippage and improving overall accessory drive efficiency. With an effective length of approximately 62 inches and a top width of 0.44 inches, this belt fits models such as the Buick Century, Cadillac DeVille, Oldsmobile Cutlass Supreme, and Pontiac Grand Prix, among others.

Compatible Vehicles and Applications

  • Buick models: Century, LeSabre, Skylark, Regal, and more
  • Cadillac models: DeVille, Eldorado, and others
  • Oldsmobile models: Cutlass, Cutlass Supreme, Delta 88, and more
  • Pontiac models: Bonneville, Grand Prix, GTO, and others

Common Issues Addressed by Dayco 15620 Belt

  • Accessory belt slippage causing loss of power to alternator or power steering
  • Wear and cracking due to heat exposure and age
  • Noise issues such as squealing or chirping belts
  • Improper belt tension leading to premature wear
  • Failure to meet OEM specifications affecting vehicle performance

Installation Notes and Tips

  • Ensure proper belt routing according to vehicle service manual
  • Check pulleys and tensioners for wear before installation
  • Use a belt tension gauge to achieve correct tension
  • Inspect belt for damage or defects prior to installation
  • Replace accessory drive belt as part of routine maintenance to avoid unexpected failures

Quality Assurance and Warranty

Dayco 15620 accessory drive belt meets SAE J636 and SAE J637 standards, ensuring compliance with industry requirements for performance and durability. Manufactured with quality materials and construction methods, this belt is backed by Dayco's commitment to reliability. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.

BrandDayco
Part Number15620
Angle36
Belt ConstructionTop Cog
ColorBlack
Effective Length62
Effective Length1574.80
MaterialSynthetic Rubber Compound
Maximum Operating Temperature79.4
Maximum Operating Temperature175
Minimum Operating Temperature-37.2
Minimum Operating Temperature-35
Outside Circumference62.57
Outside Circumference1589.28
StandardsSAE J636, SAE J637
Top Width.44

This part fits 124 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1977BuickCentury5.7LV8Fan and Air Conditioningw/o A.P.
1977BuickCentury6.6LV8Fan and Air Conditioningw/o A.P.
1977BuickRegal5.7LV8Fan and Air Conditioning
1977BuickSkylark5.7LV8Fan and Air Conditioningw/o A.P.
1977OldsmobileCustom Cruiser5.7LV8Fan and Air Conditioning
1977OldsmobileCustom Cruiser6.6LV8Fan and Air Conditioning
1977OldsmobileCutlass4.3LV8Fan and Air Conditioning
1977OldsmobileCutlass5.7LV8Fan and Air Conditioning
1977OldsmobileCutlass6.6LV8Fan and Air Conditioning
1977OldsmobileCutlass Salon4.3LV8Fan and Air Conditioning
1977OldsmobileCutlass Salon5.7LV8Fan and Air Conditioning
1977OldsmobileCutlass Salon6.6LV8Fan and Air Conditioning
1977OldsmobileCutlass Supreme4.3LV8Fan and Air Conditioning
1977OldsmobileCutlass Supreme5.7LV8Fan and Air Conditioning
1977OldsmobileCutlass Supreme6.6LV8Fan and Air Conditioning
1977OldsmobileDelta 884.3LV8Fan and Air Conditioning
1977OldsmobileDelta 885.7LV8Fan and Air Conditioning
1977OldsmobileDelta 886.6LV8Fan and Air Conditioning
1977OldsmobileOmega4.3LV8Fan and Air Conditioningw/o A.P.
1977OldsmobileOmega5.7LV8Fan and Air Conditioningw/o A.P.
1977PontiacBonneville5.7LV8Fan and Air Conditioningw/o A.P.
1977PontiacBonneville6.6LV8Fan and Air Conditioningw/o A.P.
1977PontiacCatalina5.7LV8Fan and Air Conditioningw/o A.P.
1977PontiacCatalina6.6LV8Fan and Air Conditioningw/o A.P.
1977PontiacLaurentian5.7LV8Fan and Air Conditioningw/o A.P.
1977PontiacPhoenix5.7LV8Fan and Air Conditioning
1976BuickLeSabre7.5LV8Fan and Air Conditioning
1976BuickRivieraFan and Air Conditioning
1976BuickSkylark4.3LV8Fan and Air Conditioning
1976OldsmobileCutlass4.3LV8Fan and Air Conditioning
1976OldsmobileCutlass5.7LV8Fan and Air Conditioning
1976OldsmobileCutlass Salon4.3LV8Fan and Air Conditioning
1976OldsmobileCutlass Salon5.7LV8Fan and Air Conditioning
1976OldsmobileCutlass Supreme4.3LV8Fan and Air Conditioning
1976OldsmobileCutlass Supreme5.7LV8Fan and Air Conditioning
1976OldsmobileDelta 885.7LV8Fan and Air Conditioning
1976OldsmobileOmega4.3LV8Fan and Air Conditioning
1976PontiacGrand LeMans4.3LV8Fan and Air Conditioning
1976PontiacLeMans4.3LV8Fan and Air Conditioning
1975BuickLeSabre7.5LV8Fan and Air Conditioning
1975BuickLeSabre6.6LV8Fan and Air Conditioning
1975BuickRivieraFan and Air Conditioning
1975BuickSkylark4.3LV8Fan and Air Conditioning
1975OldsmobileCutlass4.3LV8Fan and Air Conditioning
1975OldsmobileCutlass5.7LV8Fan and Air Conditioning
1975OldsmobileCutlass Salon4.3LV8Fan and Air Conditioning
1975OldsmobileCutlass Salon5.7LV8Fan and Air Conditioning
1975OldsmobileCutlass Supreme4.3LV8Fan and Air Conditioning
1975OldsmobileCutlass Supreme5.7LV8Fan and Air Conditioning
1975OldsmobileDelta 885.7LV8Fan and Air Conditioning
1975OldsmobileOmega4.3LV8Fan and Air Conditioning
1974BuickCentury7.5LV8Air Conditioning4 7/8 In. Pulley
1974BuickLeSabre7.5LV8Air Conditioning4 7/8 In. Pulley
1974BuickRegal7.5LV8Air Conditioning4 7/8 In. Pulley
1974BuickRiviera7.5LV8Air Conditioning4 7/8 In. Pulley
1974OldsmobileCutlass5.7LV8Air Conditioning
1974OldsmobileCutlass Supreme5.7LV8Air Conditioning
1974OldsmobileDelta 885.7LV8Air Conditioning
1974OldsmobileOmega5.7LV8Air Conditioning
1973BuickCentury7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1973BuickLeSabre7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1973BuickRegal7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1973BuickRiviera7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1973OldsmobileCutlass5.7LV8Fan and Air Conditioning
1973OldsmobileCutlass Supreme5.7LV8Fan and Air Conditioning
1973OldsmobileDelta 885.7LV8Fan and Air Conditioning
1973OldsmobileOmega5.7LV8Air Conditioning
1972BuickLeSabre7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1972BuickRiviera7.5LV8Fan and Air Conditioning4 7/8 In. Pulley
1971BuickLeSabre7.5LV8Air Conditioning4 7/8 In. Pulley
1971BuickRiviera7.5LV8Air Conditioning4 7/8 In. Pulley
1971BuickSkylark7.5LV8Air Conditioning4 7/8 In. Pulley
1967Oldsmobile98Fan and Power SteeringFits vehicles without air conditioning.
1967OldsmobileCutlass6.6LV8Power SteeringFits vehicles without air conditioning.
1967OldsmobileDelta 887.0LV8Fan and Power SteeringFits vehicles without air conditioning.
1966BuickRiviera7.0LV8Alternator and Air Conditioning
1966Oldsmobile98Power SteeringFits vehicles without air conditioning.
1966OldsmobileCutlass6.6LV8Power SteeringFits vehicles without air conditioning.
1966OldsmobileDelta 88Power SteeringFits vehicles without air conditioning.
1966PontiacBonneville6.4LV8Alternator and Air Pump
1966PontiacBonneville6.9LV8Alternator and Air Pump
1966PontiacCatalina6.4LV8Alternator and Air Pump
1966PontiacCatalina6.9LV8Alternator and Air Pump
1966PontiacGrand Prix6.4LV8Alternator and Air Pump
1966PontiacGrand Prix6.9LV8Alternator and Air Pump
1966PontiacGTOFan, Alternator and Air PumpSerpentine Belt compatible with vehicles equipped with power steering.
1966PontiacLeMans5.3LV8Fan, Alternator and Air PumpSerpentine Belt compatible with vehicles equipped with power steering.
1966PontiacTempest5.3LV8Fan, Alternator and Air PumpSerpentine Belt compatible with vehicles equipped with power steering.
1965BuickRiviera7.0LV8Fan, Alternator and Air Conditioning
1965BuickRiviera6.6LV8Fan, Alternator and Air Conditioning
1965BuickSkylark6.6LV8Fan, Alternator and Air Conditioning
1965Oldsmobile98Power SteeringFits vehicles without air conditioning.
1965OldsmobileCutlass6.6LV8Power Steeringw/o A.C., 62 In. Belt
1965OldsmobileCutlass5.4LV8Power Steeringw/o A.C., 62 In. Belt
1964BuickLeSabre6.6LV8Fan, Alternator and Air Conditioning
1964BuickLeSabre7.0LV8Fan, Alternator and Air Conditioning
1964BuickRiviera6.6LV8Fan, Alternator and Air Conditioning
1964BuickRiviera7.0LV8Fan, Alternator and Air Conditioning
1964Oldsmobile986.5LV8Power SteeringFits vehicles without air conditioning.
1963Oldsmobile986.5LV8Power SteeringFits vehicles without air conditioning.
1963PontiacBonneville6.4LV8Power SteeringCompatible with vehicles containing air conditioning.
1963PontiacBonneville6.9LV8Power SteeringCompatible with vehicles containing air conditioning.
1963PontiacCatalina6.4LV8Power SteeringCompatible with vehicles containing air conditioning.
1963PontiacCatalina6.9LV8Power SteeringCompatible with vehicles containing air conditioning.
1963PontiacGrand Prix6.4LV8Power SteeringCompatible with vehicles containing air conditioning.
1963PontiacGrand Prix6.9LV8Power SteeringCompatible with vehicles containing air conditioning.
1962CadillacDeVilleAir Conditioning
1962CadillacEldoradoAir Conditioning
1961CadillacDeVilleAir Conditioning
1961CadillacEldoradoAir Conditioning
1960CadillacDeVilleAir Conditioning62 In. Belt
1960CadillacEldorado6.4LV8Air Conditioning62 In. Belt
1959CadillacDeVilleAir Conditioning62 In. Belt
1959CadillacEldorado6.4LV8Air Conditioning62 In. Belt
1958Oldsmobile98Power Steeringw/A.R., w/o A.C.
1958PontiacBonnevilleAir Suspension Compressor
1957Oldsmobile88Power Steeringw/A.R., w/o A.C.
1956Oldsmobile885.3LV8Power Steeringw/A.R., w/o A.C.
1956Oldsmobile98Power Steeringw/A.R., w/o A.C.
1955Oldsmobile885.3LV8Power Steeringw/A.R., w/o A.C.
1955Oldsmobile98Power Steeringw/A.R., w/o A.C.
1954Oldsmobile88Power Steeringw/A.R., w/o A.C.
1954Oldsmobile98Power Steeringw/A.R., w/o A.C.
1953Oldsmobile98Power Steeringw/A.R., w/o A.C.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

15619

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

Related Articles