how to fix GMC Sierra T1XX (2019-Present) traction control light on

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

591 words

Problem Statement

Learn how to diagnose and fix the traction control light issue in GMC Sierra T1XX (2019-present). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the vehicle to cool before inspecting any hot components.

Symptoms

•Traction control warning light illuminated on the dashboard
•Reduced engine power or throttle response
•Unstable handling during acceleration, especially on slippery surfaces
•Vehicle may enter limp mode
•Unusual noises from the traction control system (e.g., ABS motor activation)

Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve any error codes.
2
Inspect the wheel speed sensors for damage, dirt, or disconnection.
3
Check the brake fluid level and inspect for any leaks in the brake system.
4
Examine the ABS control module for any visible damage or corrosion.
5
Test the traction control switch for functionality.
6
Review the vehicle's recent service history for any related repairs or modifications.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Multimeter
•Brake fluid

Parts Required

•Wheel speed sensor (if faulty)
•ABS control module (if faulty)
•Traction control switch (if faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve any error codes.
2
Inspect the wheel speed sensors for damage, dirt, or disconnection.
3
Check the brake fluid level and inspect for any leaks in the brake system.
4
Examine the ABS control module for any visible damage or corrosion.
5
Test the traction control switch for functionality.
6
Review the vehicle's recent service history for any related repairs or modifications.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface and the ignition is off.
Disconnect the battery to prevent electrical shorts.

2. Inspect Wheel Speed Sensors

Tools Required: Socket set, multimeter
Remove the wheel on the affected corner (if necessary).
Locate the wheel speed sensor; unplug the electrical connector.
Use a multimeter to check for continuity in the sensor's wiring.
If faulty, replace the wheel speed sensor with a new one using the following sub-steps:
- Remove the sensor mounting bolt.
- Install the new sensor and secure it with the bolt to the manufacturer's torque specifications.
- Reconnect the electrical connector.

3. Check Brake Fluid Level

Tools Required: Brake fluid
Open the hood and locate the brake fluid reservoir.
Inspect the fluid level; if low, top off with the recommended brake fluid type (DOT 3 or DOT 4).
Check for any signs of leaks in the brake lines or around the reservoir.

4. Inspect ABS Control Module

Tools Required: Socket set, clean cloth
Locate the ABS control module, usually near the brake master cylinder.
Inspect for corrosion or loose connectors; clean if necessary.
If the module shows signs of failure, replace it:
- Disconnect the battery.
- Unplug the electrical connectors and remove the mounting bolts.
- Install the new module and reconnect everything.

5. Test Traction Control Switch

Tools Required: Multimeter
Locate the traction control switch, usually on the dashboard.
Use a multimeter to check if the switch is functioning properly.
If defective, replace the switch by prying it out of the panel and plugging in a new one.