Dorman 917-139 Engine Harmonic Balancer Bolt

Engine Harmonic Balancer Bolt for GM Applications

Dorman 917-139 is an engine harmonic balancer bolt built to match the original fit and function on specified vehicles. Made from steel, it is a direct-fit replacement for GM engines that need a reliable crankshaft pulley and harmonic balancer fastener.

Compatible With a wide range of Chevrolet, GMC, Buick, Cadillac, Pontiac, Hummer, Saab, and related GM platforms, this bolt supports service work on models such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac CTS. Part number 917-139 is also cross-referenced to TechSmart B75001 for the same application.

Key Features

• Steel construction for dependable engine hardware performance
• Specific fit for listed vehicle applications
• Matches original part fit and function on specified GM vehicles
• Engine harmonic balancer bolt for crankshaft pulley and balancer service
• Direct replacement part number 917-139

Detailed Description

This Dorman engine harmonic balancer bolt is engineered as an OE-style replacement for vehicles that use a specific-fit balancer fastener. It is designed for GM cars, trucks, and SUVs across model years from 1997 through 2019, including applications such as Fits 1999-2013 Chevrolet Silverado 1500, N/A, Fits 2000-2013 GMC Yukon, N/A, and Fits 2014-2019 Cadillac CTS, N/A. The steel construction supports secure fastening in engine service where correct hardware fit is critical.

Use 917-139 when replacing a worn, damaged, or missing harmonic balancer bolt during engine repair, timing service, or front-end accessory work. This part cross-references TechSmart B75001 for the same application.

Common Uses

• Replacing a stripped or damaged harmonic balancer bolt
• Restoring proper crankshaft pulley retention during engine service
• Addressing vibration-related concerns tied to worn balancer hardware
• Completing timing cover or front engine repairs that require removal of the balancer
• Servicing GM trucks, SUVs, and performance cars that use this specific fastener

Installation Notes and Tips

Verify engine application before installation and confirm the fastener matches the original hardware specification for the vehicle. Clean the mating surfaces and inspect the harmonic balancer and crankshaft threads before tightening. Follow the vehicle service manual for torque procedure and any angle-tightening steps required for the engine.

Quality Assurance

Dorman designs this replacement bolt to match the fit and function of the original part on specified vehicles. The steel construction and application-specific design support consistent service results on GM platforms including Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac CTS models.