GM GENUINE PARTS harmonic balancer bolt 97329601 — OE crankshaft fastener, factory-fit replacement

The GM Genuine Parts 97329601 harmonic balancer bolt is the original-equipment fastener engineered to secure the crankshaft harmonic balancer on compatible GM engines.

When a harmonic balancer bolt is worn, damaged, or missing, it compromises the attachment of the crankshaft pulley and can lead to vibration or accessory-drive issues. This 97329601 bolt is manufactured to General Motors specifications and offered as a direct replacement for vehicles that require the OE part, giving technicians and DIYers a like-for-like fastener matched to factory tolerances.

What exactly does this bolt do on my vehicle?

Its primary role is to clamp the harmonic balancer (crankshaft pulley) to the end of the crankshaft, maintaining the correct timing and balance of rotating components. A correct torque and a proper OEM bolt ensure the balancer remains secure under engine load and vibration.

• Secures crankshaft harmonic balancer to engine
• Maintains factory-specified clamping force and alignment
• Helps preserve accessory belt routing and timing component stability

How is GM Genuine Parts 97329601 different from aftermarket alternatives?

This bolt is produced to GM's engineering standards and validated for fit, form, and function on supported Chevrolet, Buick, GMC, and Cadillac models. Aftermarket fasteners vary in metallurgy, thread quality, and dimensional accuracy, so the OE part reduces the risk of fitment or longevity problems.

• Engineered and tested to GM specifications for consistent performance
• Designed to match factory thread engagement and head profile
• Supports original manufacturer service procedures and torque values

What should I check when replacing this bolt?

Inspect the harmonic balancer and crankshaft threads for damage before installation; replace the bolt if it shows stretch, corrosion, or thread wear. Always follow the vehicle’s torque sequence and use a calibrated torque wrench to achieve the specified clamping force.

• Verify crankshaft threads and balancer pilot are clean and undamaged
• Use the OEM torque specification and any thread-locking compound specified by GM
• Replace the bolt rather than reusing one-time-use or visibly compromised fasteners

Will this bolt fit my GM vehicle and how do I confirm fitment?

This part number corresponds to specific GM engines and model years; confirm compatibility with your vehicle’s VIN, year, engine code, or the OEM parts catalog before ordering. Using the correct GM part number ensures proper thread size, length, and head type for your application.

• Cross-check 97329601 with your vehicle VIN or GM parts catalog
• Contact a GM dealer or refer to service documentation for torque specs
• Compare dimensions if unsure: thread pitch, bolt length, and head style

Who is this for: This GM Genuine Parts harmonic balancer bolt is intended for mechanics, repair shops, and vehicle owners who demand factory-correct replacement components for Chevrolet, Buick, GMC, or Cadillac vehicles. It’s the right choice when restoring proper crankshaft pulley attachment, following GM service procedures, or when an exact OEM fit and validated performance are required.