Add coolant to the 2018 Chevy Trax by using a 50/50 Dex-Cool mix (premixed or concentrate with distilled water) and filling the expansion reservoir when the engine is cold. Recheck after the engine has cooled and leaks are checked. This keeps the cooling system properly pressurized and prevents overheating.
What you’ll need
Gather these supplies before you begin so you can complete the task without interruptions.
- Dex-Cool long-life coolant (50/50 premixed) or Dex-Cool concentrate with distilled water
- Clean funnel
- Distilled water (if you buy concentrate)
- Rags or towels for spills
- Protective gloves
- A level, well-lit workspace on level ground
Having these items on hand helps ensure you add the correct coolant and keep the area clean and safe.
Step-by-step guide
Follow these steps to safely add coolant to the Trax’s cooling system. Do not open the radiator cap when the engine is hot; relieve pressure and work only with a cold engine.
- Park on a level surface and turn off the engine. Let it cool completely to avoid burns or boil-overs.
- Open the hood and locate the coolant expansion tank. It’s a translucent reservoir with level marks (MIN and MAX) near the radiator.
- Check the current coolant level. If it’s below the MIN line, you’ll need to add coolant. Verify you’re using Dex-Cool or an equivalent GM-approved coolant.
- Slowly remove the expansion tank cap. If the engine is cold, the cap will relieve pressure safely; set the cap aside for now.
- Place a funnel in the opening and pour coolant until the level reaches the MAX mark. If you’re using concentrate, mix it to 50/50 with distilled water before adding.
- Reinstall the expansion tank cap and tighten securely. Wipe away any spills.
- Start the engine and run it until the thermostat opens and the cooling fan cycles. This helps circulate the coolant and bleed any small air pockets.
- Let the engine cool again, then recheck the coolant level. Add a small amount if necessary to bring it up to the MAX line, but do not overfill.
- Inspect for leaks around the reservoir, hoses, and radiator. If you notice persistent loss of coolant, have the system pressure-tested by a professional.
With the coolant added and the system checked for leaks, you’re ready to resume normal driving. Proper coolant levels help prevent overheating and protect the engine from freezing or boiling over in extreme temperatures.
Safety and care notes
Always handle coolant with care. Dex-Cool is toxic if ingested and can irritate skin and eyes. Store coolant out of reach of children and pets, and dispose of any used coolant or contaminated rags at an appropriate recycling facility. If you’re unsure about the type of coolant or the correct procedure for your vehicle, consult the owner’s manual or contact a Chevy service professional.
Summary
To add coolant to a 2018 Chevy Trax, use a 50/50 Dex-Cool mix (premixed or concentrate with distilled water) and fill the expansion reservoir only when the engine is cold. Recheck after the engine has cooled, and look for leaks if levels drop again. This simple maintenance helps maintain proper cooling system pressure and engine performance.