Genuine GM LS1 LS2 LS3 LSA L76 L77 L98 V8 Harmonic Balancer Bolt 12557840

Genuine GM Harmonic Balancer / Crankshaft Pulley Retaining Bolt

Part Number: 12557840

Brand: Genuine GM

Condition: Brand New, Unused

Product Type: Harmonic Balancer / Crankshaft Pulley Bolt

Engine Family: GM LS Gen III / Gen IV V8

Quantity: 1 x Genuine GM Bolt

Engine Compatibility

Suitable for compatible GM LS V8 engines, including:

• LS1 5.7L V8

• LS2 6.0L V8

• LS3 6.2L V8

• L76 6.0L V8

• L77 6.0L V8

• L98 6.0L V8

• LSA 6.2L Supercharged V8

Australian Vehicle Applications

Holden Commodore / Calais

• VT / VX / VY / VZ – LS1, LS2 and compatible V8 applications

• VE – L76, L77, L98, LS3 and compatible V8 applications

• VF – L77, LS3 and compatible V8 applications

Holden Statesman / Caprice

• WH / WK / WL – LS1 and compatible V8 applications

• WM / WN – L76, L77, L98, LS3 and compatible V8 applications

Holden Monaro

• V2 / VZ – LS1 and compatible V8 applications

HSV Models

Selected HSV vehicles fitted with compatible LS1, LS2, LS3 and LSA V8 engines, including:

• Clubsport

• GTS

• Maloo

• Senator

• Grange

• Coupe

International Vehicle Applications

Chevrolet

• Corvette C5 – LS1 / LS6 V8

• Corvette C6 – LS2 / LS3 V8

• Camaro SS – LS3 6.2L V8

• Chevrolet SS Sedan – LS3 6.2L V8

• Selected Silverado, Tahoe, Suburban and Express V8 applications

Pontiac

• GTO – LS1 5.7L / LS2 6.0L V8

• G8 – Selected compatible V8 applications

Cadillac

• CTS-V – Selected LSA 6.2L Supercharged V8 applications

Product Information

• Genuine GM factory replacement component.

• Harmonic balancer / crankshaft pulley retaining bolt.

• Designed for compatible GM LS V8 engines.

• Torque-to-yield (TTY) bolt, intended for single-use installation.

• Genuine GM Part Number 12557840.

Important Fitment Information

Please confirm compatibility with your specific engine and original part number before purchasing.

Vehicle applications are provided as a guide only. Not all engine variants within the listed vehicle ranges use the same components.