why does my GMC Sierra T1XX (2019-Present) smell like burning oil?

Learn how to diagnose and fix the burning oil smell in GMC Sierra T1XX (2019-Present). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and parked on a level surface.
• Disconnect the battery to prevent any electrical issues.

2. Identify and Repair Leaks

• Sub-steps:
  • Inspect the oil filter; if loose, tighten it to manufacturer specifications (typically 18-24 ft-lbs).
  • If the oil filter is damaged, replace it with a new one.
  • Inspect the valve cover gasket and oil pan gasket for leaks.
    • If leaks are present, remove the valve cover or oil pan as necessary.
    • Clean the mating surfaces and replace the gasket with a new one.
    • Reinstall the cover or pan and torque bolts to specification (typically 7-9 ft-lbs for valve cover, 18-25 ft-lbs for oil pan).

3. Check and Replace Oil

• Sub-steps:
  • Ensure the oil is at the correct level; if low, top it off with the manufacturer-recommended oil type (typically 5W-30 for this model).
  • If the oil is dirty or burnt smelling, perform an oil change:
    • Drain the old oil using a wrench to remove the drain plug (typically 20-25 ft-lbs for reinstallation).
    • Replace the oil filter.
    • Refill with new oil through the oil filler cap, using a funnel to avoid spills.

4. Reassembly and Cleanup

• Sub-steps:
  • Reconnect the battery.
  • Clean any spilled oil from the engine compartment.
  • Dispose of used oil and filters according to local regulations.