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Home/Cars/GMC/Sierra/T1XX (2019-Present)/why does my GMC Sierra T1XX (2019-Present) engine light come on after an oil change?

why does my GMC Sierra T1XX (2019-Present) engine light come on after an oil change?

GMC Sierra T1XX (2019-Present)

Error Codes
Severity: mediumDifficulty: medium1-2 hours
3 min read
540 words

Problem Statement

Learn why the engine light comes on after an oil change in GMC Sierra T1XX. Follow our diagnostic steps and solutions to resolve the issue effectively.

Affected Component
Engine
Estimated Time
1-2 hours

Safety Warnings

  • ⚠Disconnect battery before working on electrical systems.
  • ⚠Allow engine to cool before opening oil drain or removing the oil filter.

Symptoms

  • •Check engine light illuminated
  • •Engine running rough or misfiring
  • •Oil pressure warning light activated
  • •Unusual engine noises (e.g., tapping or knocking)
  • •Oil leak visible under the vehicle
  • •Decreased fuel efficiency

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to identify specific issues triggering the engine light.
  2. 2Inspect the oil level using the dipstick to ensure it is at the correct level.
  3. 3Check for oil leaks around the oil filter and oil pan.
  4. 4Verify that the oil filter is properly installed and tightened.
  5. 5Inspect the air filter and intake system for any disconnection or blockage.
  6. 6Confirm that the correct oil type and viscosity were used during the oil change.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a level surface and the engine is cool.
  • Disconnect the negative battery terminal to reset the engine control module (ECM).

2. Inspect and Tighten Components

  • Oil Filter:

    • Using an oil filter wrench, carefully remove the oil filter. Inspect the O-ring for damage.
    • Reinstall a new oil filter, ensuring it is tightened to the manufacturer's specifications (usually hand-tight plus 3/4 turn).

  • Oil Drain Plug:

    • Inspect the oil drain plug for proper torque (usually around 20 lb-ft) and ensure it is not leaking. If needed, tighten or replace the gasket.

3. Check Oil Level and Quality

  • Using the dipstick, pull it out, wipe it clean, reinsert, and check the oil level.
  • If the oil level is low, add the correct type and amount of oil as specified in the owner's manual.

4. Reset the Check Engine Light

  • Reconnect the negative battery terminal.
  • Use the OBD-II scanner to clear any stored trouble codes.
  • Start the engine and check for any reoccurring issues.

5. Test Drive

  • Take the vehicle for a short test drive to ensure normal operation and monitor for any warning lights.

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
  • •Oil filter wrench
  • •Socket set
  • •Torque wrench
  • •Oil dipstick

Parts Required

  • •New oil filter
  • •Engine oil (correct type and viscosity)
  • •Oil drain plug gasket (if needed)

Additional Information

Affected Component
Engine
Estimated Time
1-2 hours
Difficulty
medium
Severity
medium
Tools Required
5 items
Parts Required
3 items

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