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

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

GMC Sierra T1XX (2019-Present)

Error Codes
15-30 minutes
Time
easy
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
2 min read
386 words

Problem Statement

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

Affected Component
Electrical
Estimated Time
15-30 minutes

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Ensure the vehicle is in 'Park' or 'Neutral' with the parking brake engaged while working on the vehicle.

Symptoms

  • •Check engine light illuminated on the dashboard
  • •Vehicle operating normally after repairs
  • •Error codes stored in the vehicle’s computer

Diagnostic Steps

  1. 1
  2. 2
  3. 3

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

Parts Required

  • •None specifically for the reset (only if repairs were needed originally).

Additional Information

Affected Component
Electrical
Estimated Time
15-30 minutes
Difficulty
easy
Severity
medium
Tools Required
1 item
Parts Required
1 item

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Solution
1. Preparation
  • Ensure that the vehicle is parked on a level surface.
  • Turn off the engine and remove the key from the ignition.
  • Gather necessary tools.
2. Connect OBD-II Scanner
  • Locate the OBD-II port under the dashboard on the driver’s side.
  • Plug in the OBD-II scanner.
3. Turn on Ignition
  • Insert the key into the ignition and turn it to the "ON" position without starting the engine.
  • Wait for the scanner to initialize.
4. Reset the Check Engine Light
  • Follow the prompts on the OBD-II scanner to navigate to the “Erase Codes” or “Clear Codes” option.
  • Confirm the action to reset the check engine light.
5. Disconnect Scanner
  • Once the check engine light is reset, turn the ignition off and disconnect the scanner from the OBD-II port.
6. Test Drive
  • Start the engine and take the vehicle for a short drive to ensure the light does not reappear.