Dorman Vehicle Speed Sensor 917-644 for GM Cars — Direct-Replace, OEM-Style Fit and Signal

The Dorman 917-644 Vehicle Speed Sensor is an aftermarket direct-replacement sensor engineered to restore accurate speed signal and drive-train communication on compatible GM vehicles. This sensor is built to mirror the fit and electrical function of the original part used on a range of Buick, Chevrolet, Pontiac, Oldsmobile, Cadillac and Saturn models. Constructed from quality materials and assembled with performance in mind, it is intended as a practical repair option when the factory sensor has failed or produces inconsistent speed readings. Before ordering, verify exact year, make, model and trim using your vehicle lookup tool to ensure correct fitment.

How does the Dorman 917-644 restore vehicle speed signals?

The sensor converts rotational movement into an electrical speed signal that the vehicle’s ECU and dash instruments use. When the original sensor fails, the electronic signal can become weak or intermittent; replacing it with a properly matched unit reestablishes accurate speed reporting.

• Recreates OEM-style electrical output for compatibility with factory systems
• Designed to match original mounting points and connector type
• Helps stabilize speedometer, ABS inputs and transmission shift logic

Is this sensor compatible with my car and how do I confirm fit?

Dorman publishes a wide list of compatible models and years, but due to variations in trims and production runs you should confirm fitment before purchase. Use the online garage tool or enter your vehicle’s exact year, make, model and trim to verify compatibility with the part number 917-644.

• Covers many GM vehicles from the 1990s through early 2010s—see specific model list
• Fit confirmation avoids returns and ensures correct electrical connector match
• Contact support if your vehicle is close to listed years or has aftermarket modifications

What are the practical benefits of choosing this replacement sensor?

Replacing a faulty speed sensor with a correctly matched unit restores dependable speed feedback for instruments and control systems. The Dorman part aims for a balance of durability and value for DIY installers and professional shops alike.

• Durable materials to withstand engine-bay conditions and road vibration
• Direct-replacement design reduces installation time and complexity
• Backed by Dorman’s product expertise and industry experience

How difficult is installation and what should I prepare for?

Installation difficulty varies by vehicle and sensor location, but most replacements are straightforward with basic hand tools. For vehicles where the sensor is accessible from the wheel well or transmission housing, expect a brief service time for an experienced DIYer or technician.

• Basic mechanical skills and standard tools often suffice
• Vehicle-specific access may require lifting the car or removing a wheel or splash shield
• Confirm connector type and torque specifications per vehicle repair manual

Who is this for: The Dorman 917-644 is suitable for owners and mechanics repairing older GM cars and light trucks that exhibit speedometer errors, erratic transmission behavior, or ABS/traction control faults traceable to a failing speed sensor. It’s a practical option for anyone seeking a direct-replacement sensor that matches factory fit and function without the higher cost of OEM-branded parts. Remember to verify fitment for your exact year and trim to ensure proper electrical and mechanical compatibility.

FAQ

Q: Will the Dorman 917-644 fit my specific year and trim?

A: Confirm fit by entering your exact year, make, model and trim in the vehicle lookup tool; compatibility varies by production run.

Q: Can I install this sensor myself?

A: Many owners can install it with basic tools, but access and steps depend on the vehicle—consult a repair manual if unsure.