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Cadillac Check Engine Coolant Level

This guide provides instructions on how to check engine coolant on Cadillac. You will also find guidelines on how to add coolant if the level is low.

Cadillac Check Engine Coolant Level
DIY COST $5-$20



  • The engine is overheating.
  • The temperature needle goes in the HIGH range after a few minutes of driving.
  • Check Coolant Warning Message
  • Low Engine Coolant Message
  • Check coolant level light comes on.

What you will need


  1. Park the Cadillac on level ground.cadillac


  2. Allow the engine to cool down. Do not check the engine coolant level on your Cadillac if the engine is still warm. There is a high risk of getting burned!
  3. Pull the lever until you hear the Cadillac hood pop open.

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  4. Locate the Coolant Reservoir. The engine coolant expansion reservoir is where you need to add coolant. 

    cadillac engine coolant reservoir

    check low coolant level 1995-2020 Cadillac vehicle

  5. Look at the side of the coolant reservoir tank and note the low and high-level marks on the side. If the level is below the minimum mark, add coolant, or your vehicle may overheat.
  6. Very slowly, remove the cap by turning it counter-clockwise. Perform this step only after the engine has cooled down. cadillac coolant reservoir cap
  7. Add engine coolant/antifreeze. Only add coolant type recommended by Cadillac. It is recommended that the system be flushed and filled with the recommended Cadillac coolant when possible.

If you add coolant or the level is already full, but you are still getting the warning light, there is a good chance the coolant level sensor mounted on the expansion tank is defective.

Do not continue to drive or keep the engine running if the coolant light says on and the engine starts to overheat. 


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Safety Tips

Auto Repair Safety Notes


Tips & Warnings

  • When the engine is hot - Never open the radiator cap when the engine is hot. Wait to for the engine to cool down first. You may get seriously burned if the cap is opened when the engine is still hot or warm. The cooling system may be under pressure and may spray hot coolant if the cap is removed, causing burns or other injuries
  • When towing - Due to the added load of the trailer, your vehicle's engine may overheat on hot days (at temperatures over 85°F [30°C]) when driving up a long or steep grade. If the engine coolant temperature gauge indicates overheating, immediately turn off the air conditioning (if in use), pull your vehicle off the road, and stop in a safe spot.
  • Coolant level keeps dropping -If the coolant level drops within a short time after replenishing Visually check the radiator, hoses, engine coolant filler cap, radiator cap, drain plug and water pump for leaks.  If you cannot find a leak, have a mechanic test the cap and check for leaks in the cooling system. 
  • When adding coolant - The coolant is neither plain water nor straight antifreeze. The correct mixture of water and antifreeze must be used to provide proper lubrication, corrosion protection and cooling. Be sure to read the antifreeze or coolant label.