Dorman Vehicle Speed Sensor VSS replacement for GM cars and vans, direct-fit 917-644 — restores speed readings & shift timing

The Dorman 917-644 Vehicle Speed Sensor is a direct-fit replacement sensor engineered to restore accurate vehicle speed readings and compatible with a wide range of GM-era cars and vans.

If your speedometer, transmission shift points, or cruise control are acting up, the vehicle speed sensor (VSS) is a common component to check. Dorman designed this aftermarket sensor to match the original equipment's mounting and electrical interface, providing a straightforward swap for supported Buick, Chevrolet, Cadillac, Pontiac, Oldsmobile and Saturn models. Before ordering, confirm fitment by entering your vehicle’s exact make, model and trim in the garage tool.

How does this sensor affect my vehicle's performance?

A functioning speed sensor supplies the engine and transmission controls with accurate speed data used for shift timing, speedometer readout and some stability systems. Replacing a faulty sensor can return normal shifting behaviour and correct dashboard displays without additional reprogramming on most vehicles.

• Restores precise vehicle speed signal to ECU and transmission module.
• Helps correct erratic or frozen speedometer readings.
• Can resolve irregular gear changes caused by bad speed input.

What vehicles does the Dorman 917-644 fit?

This part is built to match the original sensor for numerous GM-platform vehicles from the 1990s through early 2010s. Compatibility includes multiple models across Buick, Chevrolet, Cadillac, Pontiac, Oldsmobile and Saturn — verify exact years and trims in the vehicle lookup before purchase.

• Common Buick fits: Century, LeSabre, Lucerne, Regal, Rendezvous and more.
• Chevrolet coverage includes Camaro, Impala, Monte Carlo, Uplander and others.
• Also fits select Cadillac, Pontiac, Oldsmobile and Saturn applications.

What are the construction and quality highlights?

Dorman manufactures this replacement sensor using components chosen for longevity and consistent electrical output. The part aims to mirror the original sensor’s connection, mounting, and signal characteristics to minimize installation complications and provide dependable operation.

• Engineered for a matching fit and electrical compatibility.
• Durable materials and connectors to resist road and engine-bay exposure.
• Backed by product support and industry experience from Dorman’s technicians.

How difficult is installation and what should I prepare?

Installation is generally straightforward for anyone comfortable working under the vehicle or in wheel well areas. Typical installation requires basic hand tools and a few precautionary steps to avoid damage to the connector or sensor housing.

• Prepare jack stands or ramps if access from underneath is needed.
• Disconnect the battery briefly when handling electrical connectors for safety.
• Remove retaining hardware, swap the sensor, then verify electrical connection and test drive.

Who is this for: The Dorman 917-644 is suited to DIY mechanics, independent repair shops and fleet maintenance teams seeking a reliable replacement for a failing vehicle speed sensor on compatible GM-based cars and vans. If your vehicle shows speedometer errors, shifting faults, or cruise control inconsistencies and the vehicle lookup confirms fitment, this sensor provides a cost-effective alternative to dealer parts while matching the original fit and function.