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my GMC Sierra T1XX (2019-Present) check engine light came on and it’s shaking - GMC Sierra
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my GMC Sierra T1XX (2019-Present) check engine light came on and it’s shaking

GMC Sierra T1XX (2019-Present)

Error Codes
2-4 hours
Time
medium
Difficulty
high
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
580 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix engine shaking and check engine light issues in GMC Sierra T1XX (2019-Present). Step-by-step guide with diagnostic procedures.

Affected Component
Engine
Estimated Time
2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

  • •Disconnect battery before working on electrical systems.
  • •Allow engine to cool before opening any components.

Symptoms

  • •Check engine light illuminated
  • •Engine shaking or vibrations
  • •Rough idle or stalling at low speeds
  • •Decreased acceleration and power
  • •Poor fuel economy
  • •Increased emissions

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6

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
  • •Torque wrench
  • •Multimeter
  • •Fuel pressure gauge
  • •Basic hand tools

Parts Required

  • •Spark plugs
  • •Ignition coils (if needed)
  • •Fuel filter
  • •Air filter
  • •Engine mounts (if damaged)

Additional Information

Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
6 items
Parts Required
5 items

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Solution
1. Preparation
  • Gather tools: OBD-II scanner, socket set, torque wrench, multimeter, fuel pressure gauge, and basic hand tools.
  • Park the vehicle on a level surface and engage the parking brake.
  • Disconnect the battery before working on electrical components.
2. Address Ignition System Issues

  • Remove Spark Plugs:

    • Use a socket wrench to loosen and remove spark plugs.
    • Inspect for wear, carbon buildup, or damage.

  • Replace Ignition Coils (if necessary):

    • Disconnect the electrical connector from each ignition coil.
    • Remove mounting bolts and take out the coil.
    • Install the new coil and reconnect the connector.
    • Repeat for all affected cylinders.
3. Check and Repair Fuel System

  • Test Fuel Pressure:

    • Connect the fuel pressure gauge to the fuel rail.
    • Turn the ignition to the "ON" position (do not start) and check the pressure reading.
    • If pressure is low, inspect and replace the fuel pump or filter as necessary.

  • Replace Fuel Filter (if needed):

    • Locate the fuel filter and relieve the fuel pressure.
    • Disconnect fuel lines and remove the old filter.
    • Install the new filter, ensuring proper orientation and tight connections.
4. Inspect Air Intake System

  • Examine Air Filter:

    • Remove the air filter housing cover.
    • Inspect the filter for dirt and debris; replace if necessary.

  • Check Intake Hoses:

    • Inspect hoses for cracks or loose connections.
    • Tighten or replace hoses as required.
5. Examine Engine Mounts
  • Inspect Engine Mounts:
    • Visually check for cracks, tears, or separation from the engine or frame.
    • Replace any damaged mounts to reduce vibrations.