ACDelco 12563084 Accessory Drive Belt Tensioner Assembly

Accessory Drive Belt Tensioner Assembly

Fits: 1987-1987 Oldsmobile Firenza, 1988-1996 Buick Regal, 1988-1997 Oldsmobile Cutlass Supreme, 1988-2003 Pontiac Grand Prix, 1990-1996 Chevrolet Beretta, 1990-1994 Chevrolet Cavalier, 1990-1990 Chevrolet Celebrity, 1990-1996 Chevrolet Corsica, 1990-2001 Chevrolet Lumina, 1990-1996 Chevrolet Lumina APV, 1990-1994 Oldsmobile Silhouette, 1990-1991 Pontiac 6000, 1990-1998 Pontiac Trans Sport, 1996-1998 Oldsmobile Silhouette, 1991-1994 Pontiac Sunbird, 1994-2005 Buick Century, 1994-1998 Buick Skylark, 1994-1998 Oldsmobile Achieva, 1994-1996 Oldsmobile Cutlass Ciera, 1994-1998 Pontiac Grand Am, 1995-2005 Chevrolet Monte Carlo, 1997-1998 Chevrolet Venture, 2000-2005 Chevrolet Impala

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Drive Belt Tensioner



  • Balance Shaft;Camshaft;Camshaft Phaser;Tensioner;Coolant Hose;Coolant Pipe;Crankcase;Crankshaft;Dipstick;Engine;Engine Mount;Engine Strut;Exhaust Manifold; Flywheel Gasket;Head Gasket;Intake Manifold;Oil Drain Plug;Oil Fill Tube;Oil Level Sensor;Oil Pan;Oil Separator;Oil Tank;Thermal Bypass Pipe;Timing;Valve Adjuster;Valve Cover;Valve Lifter;Variable Valve Timing (VVT) Solenoid


Degree Range Of Adjustment46
FAQ - A1Yes. If the drive belt is too tight, damage to other drive components may occur.
FAQ - Q1Can a drive belt be too tight?
Features & Benefits - B1Helps keep drive belt at correct tension to help maintain proper function
Features & Benefits - B2GM-recommended replacement part for your GM vehicle's original factory component
Features & Benefits - B3Offering the quality, reliability, and durability of GM OE
Features & Benefits - B4Manufactured to GM OE specification for fit, form, and function
Good Maintenance Practices - S1 B1Before purchasing and installing a drive belt tensioner assembly, make sure it is the correct size and fit for your vehicle.
Good Maintenance Practices - S1 B2Be sure to have the replacement tensioner properly aligned to the other drive component pulleys.
Good Maintenance Practices - S1 B3Have your vehicle inspected as soon as possible if the 'Service Engine Soon' light illuminates.
Good Maintenance Practices - S1 B4Have your vehicle inspected immediately if the 'Service Engine Soon' light flashes rapidly, as this could indicate an engine misfire condition which may damage your engine and/or engine emission components.
Good Maintenance Practices - S1 B5Regularly inspect assembly for signs of damage or wear, and replace them if signs of damage are found.
Marketing Statement - Product LineStay with the parts brand your General Motors vehicle came with and get the quality you know and trust with ACDelco GM Original Equipment Engine Components. ACDelco GM OE replacement parts, such as intake manifolds, engine oil cooler lines, tensioners, balancers, and pullets, give you the peace of mind that the fit, form, and function is up to the high standards and specifications of General Motors. ACDelco GM Original Equipment Engine Components are manufactured for many makes and models of GM car, light duty truck, and sport utility vehicle.
Mkt_State_Warranty_CA36 Months/60,000 KM (Parts Only). Please see for more details.
Mkt_State_Warranty_US24 Month / Unlimited Mile Limited Warranty (Parts Only). Please see for more details.
Product DescriptionACDelco GM Original Equipment Drive Belt Tensioner Assemblies are spring-loaded pulleys designed to draw tension on your vehicle's serpentine belt, and are GM-recommended replacements for your vehicle's original components. These original equipment drive belt tensioner assemblies have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
Programming RequiredNO
Signs of Wear & Troubleshooting - S1 B1Worn or cracked tensioner pulleys
Signs of Wear & Troubleshooting - S1 B2Drive belt squeal
Signs of Wear & Troubleshooting - S1 B3Tensioner misalignment
Signs of Wear & Troubleshooting - S1 HSigns of wear for drive belt tensioner assembly include but are not limited to:



  • 1988-1996 Buick Regal
  • 1997-1998 Chevrolet Venture
  • 1990-1994 Oldsmobile Silhouette
  • 1994-1998 Buick Skylark
  • 1988-2003 Pontiac Grand Prix
  • 1991-1991 Pontiac 6000
  • 1994-1998 Pontiac Grand Am
  • 1991-1994 Pontiac Sunbird
  • 1987-1987 Oldsmobile Firenza - Position: Accessory Drive
  • 1990-1996 Chevrolet Beretta
  • 1994-1998 Oldsmobile Achieva
  • 1990-1990 Chevrolet Celebrity - Position: Accessory Drive
  • 1990-1994 Chevrolet Cavalier
  • 1990-1996 Chevrolet Corsica
  • 1994-2005 Buick Century
  • 1990-1990 Pontiac 6000 - Position: Accessory Drive
  • 1996-1998 Oldsmobile Silhouette
  • 1990-1998 Pontiac Trans Sport
  • 1990-1996 Chevrolet Lumina APV
  • 1988-1997 Oldsmobile Cutlass Supreme
  • 1995-2005 Chevrolet Monte Carlo
  • 2000-2005 Chevrolet Impala
  • 1990-2001 Chevrolet Lumina
  • 1994-1996 Oldsmobile Cutlass Ciera
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