how to diagnose a coolant leak in GMC Sierra T1XX (2019-Present)?

• •Coolant warning light illuminated on the dashboard
• •Visible coolant puddles or stains under the vehicle
• •Sweet smell of coolant in the engine compartment or cabin
• •Engine temperature gauge reading higher than normal
• •Steam or vapor coming from the engine area
• •Low coolant level in the reservoir

1. 1Examine the engine bay and undercarriage for any visible signs of coolant leakage.
2. 2Inspect the coolant reservoir for cracks or leaks and ensure that the coolant level is adequate.
3. 3Perform a cooling system pressure test using a coolant pressure tester to identify leaks.
4. 4Check all hoses, clamps, and connections for wear, damage, or looseness.
5. 5Inspect the water pump for signs of leakage, such as coolant accumulation around the pump area.
6. 6Inspect the heater core for leaks, especially if there's a sweet smell inside the cabin or wet carpets.

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

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

• •Coolant pressure tester
• •Socket set
• •Screwdriver set
• •Drain pan

• •Replacement hoses (if damaged)
• •Coolant reservoir (if cracked)
• •Water pump (if leaking)
• •Heater core (if leaking)