Standard ALS1337T ABS Wheel Speed Sensor - Front

ABS Wheel Speed Sensor for Front Applications

Standard ALS1337T is an ABS wheel speed sensor built for front-position applications on select Chevrolet, GMC, Saab, Isuzu, Buick, and Oldsmobile vehicles. It uses an OE-matching Hall sensor signal to support accurate wheel speed input for the anti-lock brake system.

For drivers searching for a front ABS wheel speed sensor for a 2002-2009 Chevrolet Trailblazer or a front ABS sensor for a 2002-2009 GMC Envoy, this Standard ALS1337T replacement is built to match the original sensor style and connector layout.

Key Features

• OE-matching Hall sensor signal for consistent ABS wheel speed readings
• Fiberglass-filled thermoplastic sensor housing for heat resistance and durability
• FPM O-ring helps seal against leaks for long service life
• Female connector with 1 connector, 2 male blade terminals
• Bolt-mount design for direct-fit installation on listed front positions

Detailed Description

Standard ALS1337T is an ABS wheel speed sensor designed for front wheel locations on compatible GM and related platforms, including Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, Isuzu Ascender, Buick Rainier, Chevrolet SSR, Trailblazer EXT, Envoy XL, Envoy XUV, and Oldsmobile Bravada. The Hall-effect signal is engineered to match OE output characteristics, helping the ABS module read wheel speed data accurately during braking events. The sensor body uses fiberglass-filled thermoplastic to handle heat stress, while the FPM O-ring supports sealing at the mounting point. Standard ALS1337T is also referenced by Standard Ignition ALS1337 and cross-references Dayco 70838 for the same application.

What This Sensor Helps Address

• ABS warning light caused by a failing front wheel speed sensor
• Erratic or missing wheel speed signal to the ABS module
• Brake pulsation or ABS activation concerns related to sensor input
• Intermittent traction control or stability system faults tied to wheel speed data
• Corrosion, heat damage, or seal failure at the sensor location

Installation Notes and Tips

Fits 2002-2009 Chevrolet Trailblazer, front; 2002-2009 GMC Envoy, front; 2005-2009 Saab 9-7x, front; 2003-2008 Isuzu Ascender, front; 2004-2007 Buick Rainier, front; 2003-2006 Chevrolet SSR, front; 2002-2006 Chevrolet Trailblazer EXT, front; 2002-2006 GMC Envoy XL, front; 2004-2005 GMC Envoy XUV, front; 2002-2004 Oldsmobile Bravada, front; and 2002-2003 Oldsmobile Bravada, front. For the 2002-2003 Oldsmobile Bravada, no programming is required; install the sensor and follow the OEM factory relearn procedure. Verify connector style, mounting type, and front-position placement before installation.

Quality Assurance

Standard manufactures this sensor with complete in-process quality control from production through final inspection. The OE-matching signal design, heat-resistant housing, and sealing features are selected to support reliable ABS performance in daily driving conditions.