How to check or add engine coolant on Cadillac vehicles

How to check or add engine coolant on Cadillac vehicles

Last Updated on Wednesday Mar 28, 2018

In this guide, you will find instructions on how to check engine coolant on Cadillac and add coolant if the level is low.


  • Engine Overheating,
  • Temperature gauge in HIGH range,
  • Check Coolant Warning,
  • Low Engine Coolant Message

What you will need


Step 1 - Open Hood

Park your Cadillac on a level surface. Wait for the engine to cool down. Once your Cadillac engine has cooled down you can proceed by opening the hood. Pull the lever until you hear the Cadillac hood pop open. Next, you need to release the hood safety latch at the front of your vehicle.

Step 2 - Locate Coolant Reservoir

How to check coolant Cadillac ATS, CTS, XTS, CT6, XT5, Escalade, SRX, DTS, STS, BLS, XLR

Next, locate the coolant reservoir (tank) on your Cadillac. This is where you add engine coolant reservoir is on a Cadillac. On a Cadillac, the coolant reservoir is located on either driver or passenger side of the engine.

Step 3 - Check Cadillac Coolant Level

check low coolant level 1995-2020 Cadillac vehicle

Remove cap. Look at the coolant reservoir tank and note the low and high level. If the level is below the minimum mark you will need to add coolant or your vehicle may overheat.

Step 4 - Add Coolant / Antifreeze

Add engine coolant/antifreeze. Only add coolant type recommended by Cadillac. In case of an emergency, it is ok to use any color coolant. It is recommended that the system be flushed and filled with the recommended Cadillac coolant when possible.


  1. Do not remove the radiator or the coolant reservoir cap when the engine is hot. Let the engine cool down or you risk getting burned by the coolant. Allow the engine to cool down before you remove the cap. Hot coolant may blow out of the radiator causing serious injuries or burns. Use a thick towel to place on top of the cap. Press the cap down and turn it slowly counterclockwise. Allow pressure to release from the system for a couple of seconds before you remove the cap. If the engine is still hot, the system may still be under pressure.
  2. Always use the correct coolant type. Generally, you need to mix 50% full strength antifreeze with 50% water but it is recommended to follow your manufacturer's percentages for mixing coolant and water.
  3. Do not only use ONLY water in the cooling system, especially in a car that is overheating. If you are not sure what type of coolant to use, look it up in your owner's manual. If that is not available, use a coolant that will mix with any color.
  4. Add coolant until it is filled to the recommended level. Tighten the cap. Visually inspect the cooling system and the hoses for any visible leaks. If you notice any damaged hoses, then replace them as soon as possible.
  5. Antifreeze with corrosion inhibitors may contain ethylene glycol which is flammable. Avoid spilling antifreeze on a hot engine to avoid causing a fire. 
  6. Antifreeze and anti-corrosion agents can be hazardous to your health. Keep your coolant container in a safe place and away from the reach of children.
  7. Coolant in your vehicle not only cools down the engine and prevents it from overheating. It also protects it from freezing in the winter.