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ACDELCO
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ACDELCO 12563266 Specifications
Bolt And Washer IncludedNo
Center Bore Diameter (IN)1.37in
Center Bore Diameter (MM)34.9mm
Depth (IN)3.68
Depth (MM)93.35
Drive Belt TypeSerpentine
Keyway TypeYes
Outside Diameter (IN)7
Outside Diameter (MM)177.73
Programming RequiredNo
GM Original Equipment
ACDelco GM Original Equipment Engine Harmonic Balancers help reduce torsional vibrations by connecting to the crankshaft of your vehicle's engine. They serve as pulleys for the engine accessory drive belts, and are GM-recommended replacements for your vehicle's original components. These original equipment harmonic balancers have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Features & Benefits:
  • Connects to the crankshaft of your vehicle's engine to help reduce vibration
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Offering the quality, reliability, and durability of GM OE
  • Manufactured to GM OE specification for fit, form, and function
ACDelco Quality

ACDelco breaks down their premium portfolio of Original Equipment and Aftermarket parts into two tiers: GM Original Equipment and ACDelco Gold.

GM ORIGINAL EQUIPMENT
GM Original Equipment parts are the true OE parts installed during production or validated by GM—designed, engineered, and tested to rigorous standards and backed by General Motors.
ACDELCO GOLD (PROFESSIONAL)
ACDelco Gold parts are the high-quality alternative to OE parts, manufactured to meet GM expectations for fit, form, and function and backed by General Motors.



Warranty Information:
24 Month / Unlimited Mile Limited Warranty
Warranty Details