Delphi Rear ABS Wheel Speed Sensor SS20977

Delphi SS20977 is a rear ABS wheel speed sensor built for accurate wheel speed signal reporting in vehicles equipped with rear-mounted sensor locations. It is a direct-fit style replacement for select Chevrolet, GMC, Saab, Buick, and Oldsmobile applications, including Trailblazer, Envoy, and related platforms.

Delphi validates its sensors to OE standards and calibrates them for consistent readings, helping support reliable ABS operation and fewer repeat repairs. This part cross-references Standard Ignition ALS1737 for the same application.

Key Features

• Rear ABS wheel speed sensor for select GM and Saab applications
• Delphi part number SS20977
• Blade terminal type with 2 male terminals
• 1 oval male connector
• No wiring harness included
• No mounting hardware included
• Package contents: ABS wheel speed sensor and instruction sheet
• Position: rear

Detailed Product Overview

Delphi SS20977 is engineered as a rear wheel speed sensor for vehicles that rely on precise ABS input at the rear axle. The sensor uses an oval connector with a single male connector and blade-style terminals, matching the electrical interface used on the listed applications. For buyers searching for a rear ABS wheel speed sensor for 2002-2009 Chevrolet Trailblazer, 2002-2009 GMC Envoy, or 2005-2009 Saab 9-7x, this part number provides a focused OE-style replacement option.

Delphi’s sensor portfolio is developed with OE validation methods and calibrated to OE standards, which supports accurate signal output for the ABS control system. The SS20977 part number is also a useful reference when comparing replacement options for Buick Rainier, Chevrolet SSR, GMC Envoy XL, GMC Envoy XUV, and Oldsmobile Bravada rear sensor applications.

Vehicle Fitment

• Fits 2002-2009 Chevrolet Trailblazer, rear
• Fits 2002-2006 Chevrolet Trailblazer EXT, rear
• Fits 2003-2006 Chevrolet SSR, rear
• Fits 2002-2009 GMC Envoy, rear
• Fits 2002-2006 GMC Envoy XL, rear
• Fits 2004-2005 GMC Envoy XUV, rear
• Fits 2005-2009 Saab 9-7x, rear
• Fits 2004-2007 Buick Rainier, rear
• Fits 2002-2004 Oldsmobile Bravada, rear

Common Issues This Sensor May Resolve

• ABS warning light caused by a failed rear wheel speed sensor
• Erratic or missing wheel speed signal at the rear axle
• ABS system fault codes related to rear sensor input
• Traction control or stability system concerns tied to wheel speed data
• Brake system performance issues caused by inaccurate sensor readings

Installation Notes and Tips

Confirm the rear position and connector style before installation. Compare the existing sensor’s connector shape, terminal count, and mounting location to the Delphi SS20977 part number before removal. Because mounting hardware and wiring harness are not included, reuse or source any required related components separately as needed for the vehicle.

Quality Assurance

Delphi backs this sensor with OE-focused development and product validation methods. Each sensor is tested and calibrated to OE standards to help maintain accurate readings in the ABS system.