2024-2025 Chevrolet Trax & Buick Envista ABS Module Failure: A Buyer's Guide

Symptoms of a Failing ABS Control Module Assembly

A problem with the ABS module assembly on your 2024-2025 Chevrolet Trax or Buick Envista will typically make itself known through dashboard warnings and noticeable changes in braking behavior. Because this part is also tied into other safety systems, you may see warnings for more than just the ABS.

• ABS Warning Light: This is the most common symptom. An amber ABS light on your instrument cluster indicates the system has detected a fault and has likely disabled the anti-lock braking feature.
• Traction Control and Stability Control Lights: Modern traction and stability control systems (like GM's StabiliTrak) rely on the ABS hardware to function. A fault in the ABS module will almost always disable these systems as well, illuminating their respective warning lights. Some owners report seeing a "Service StabiliTrak" message.
• Brake System Failure Warning: In some cases, owners have reported a more severe "brake system failure" error message, which may be accompanied by a loss of power braking, making the pedal much harder to press.
• Brakes Locking Up: The primary purpose of ABS is to prevent your wheels from locking. If the module fails, the system may not activate, allowing one or more wheels to lock up and skid during hard braking, especially on wet or slippery surfaces.
• Unresponsive or Spongy Brake Pedal: A failure within the hydraulic portion of the assembly can lead to a brake pedal that feels unresponsive, hard to press, or spongy.
• Inaccurate Speedometer: The ABS module processes data from the wheel speed sensors, and on many modern vehicles, this data is also used for the speedometer. A malfunctioning module can cause the speedometer to read incorrectly or stop working altogether.

Common Diagnostic Trouble Codes (OBD-II)

A technician with a proper OBD-II scanner can pull codes from the ABS module to pinpoint the problem. While codes can vary, some common ones pointing to a module or system failure include:

• U0121: Lost Communication With Anti-Lock Brake System (ABS) Control Module
• C0110: ABS Pump Motor Circuit Failure
• C0265: ABS Module Relay Circuit Malfunction
• C1210: ABS Control Module Internal Failure

Known Issues, TSBs, and Recalls

As the 2024-2025 Trax and Envista are relatively new models, widespread, long-term issues with the ABS module have not yet been established. However, some early owners have reported premature failures of the brake module assembly, requiring replacement under warranty.

It is important to note a related safety recall that affects these vehicles, although it does not involve the ABS module directly.

• NHTSA Recall 23V744000: This recall addresses a software issue in the Virtual Cockpit Unit Module (VCU) that can cause the instrument panel display to go blank intermittently. This is a critical safety issue as it can hide the speedometer and all warning lights, including any that would indicate an ABS fault. The fix is a software update performed by a dealer or through an over-the-air (OTA) update.

Programming and Calibration Requirements

Modern vehicle modules are VIN-specific and must be configured to work with the other computers in your car. After installing a new or used ABS module assembly in a Trax or Envista, a technician must use a scan tool with GM-specific software (like the dealership's SPS - Service Programming System) to program the module. This process ensures the module has the correct software and is calibrated for your vehicle's specific features. Failure to program the module will result in it not functioning, and the ABS and other warning lights will remain on. While some independent shops have the necessary tools, you should confirm this before starting the repair; otherwise, a trip to a GM dealership will be required.

Buying a Used ABS Control Module Assembly

Given the high cost of a new OEM unit, a used ABS module assembly from a reputable recycler is a smart financial choice. These vehicles are new enough that any available used parts will have very low mileage. Here’s what to look for:

• Verify the Part Number: Match the part number from your original unit to the replacement. Key OEM part numbers for this assembly include 42862787 (which supersedes 42823688) and 42772597. Always confirm fitment for your specific vehicle.
• Inspect for Damage: Check the unit for any physical damage, especially to the electrical connectors and the brake line ports. Ensure none of the plastic connectors are cracked or broken.
• Low Mileage is Standard: Since these parts come from 2024-2025 models, mileage is less of a concern than with older vehicles. The part will inherently be a low-mileage component.
• Source Vehicle Information: If possible, get the VIN of the vehicle the part came from. This can sometimes help in verifying compatibility.
• Why Used OEM is a Good Choice: For a complex, integrated component like this, a used Original Equipment Manufacturer (OEM) part is often superior to new aftermarket alternatives (if any were available). The OEM unit was designed specifically for your vehicle, ensuring proper fit, function, and communication with other onboard systems once programmed.

Cost Breakdown

The cost to replace the ABS module assembly can vary significantly based on the part source and labor rates. As this is a complete hydraulic and electronic unit, it is more expensive than a simple electronic module.

Frequently Asked Questions (FAQ)