how to reset the check engine light on GMC Sierra T1XX (2019-Present)?

GMC Sierra T1XX (2019-Present)

Error Codes

10-30 minutes

Time

easy

Difficulty

medium

Severity

2 min read

357 words

Problem Statement

Learn how to reset the check engine light on GMC Sierra T1XX (2019-Present) after addressing issues. Step-by-step guide with diagnostic steps.

Affected Component

Engine

Estimated Time

10-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in park and the ignition is turned off before plugging or unplugging the OBD-II scanner.

Symptoms

•Check engine light illuminated
•Possible stored error codes in the vehicle's computer
•Engine performance issues (if not addressed)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to determine the cause of the check engine light.
2
Address any mechanical or electrical issues indicated by the error codes.
3
Clear error codes using the OBD-II scanner.

Solution

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
•Vehicle owner’s manual

Parts Required

•None for reset, but be aware of any parts that may need replacement based on error codes.

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Solution

1. Preparation

Tools Required: OBD-II scanner, vehicle owner’s manual
Ensure the vehicle is parked on a level surface and the engine is turned off.

2. Use the OBD-II Scanner

Locate the OBD-II port under the dashboard on the driver's side of the vehicle.
Plug the OBD-II scanner into the port.
Turn the ignition to the "ON" position without starting the engine.

3. Read and Clear Error Codes

Follow the scanner's prompts to read any stored diagnostic trouble codes (DTCs).
Once you have noted the codes, select the option to clear or erase the codes.
Confirm the action when prompted by the scanner.

4. Verification of Reset

Turn off the ignition and remove the OBD-II scanner.
Start the engine and ensure that the check engine light is no longer illuminated.