Cadillac DTS 2009 Convenience & Personalization Guide

For optimal performance, use SAE 5W-30 full synthetic oil in the Cadillac DTS 2009.
To reset the 'Check Engine' light, disconnect the battery for about 15 minutes, then reconnect. If the light remains, consult a professional technician for further diagnosis.
Open the hood and locate the air filter housing. Unclip the housing, remove the old filter, and insert a new one. Make sure it fits snugly before reclipping the housing.
Check the battery connections and charge, inspect the starter motor and fuses, and ensure that there is fuel in the tank. If the problem persists, a professional diagnostic is recommended.
The recommended tire pressure for the Cadillac DTS 2009 is 30 psi for both front and rear tires.
Access the back of the headlight assembly under the hood, twist and remove the bulb socket, replace the old bulb with a new one, and reassemble. Ensure the bulb is securely in place.
Regularly check oil levels and change every 7,500 miles, rotate tires every 6,000 miles, and replace air filters every 15,000 miles. Follow the owner’s manual for detailed intervals.
First, clean the sunroof drains using compressed air or a flexible wire. If leaks persist, check the sunroof seal for damage and consider replacing it if necessary.
Use a 50/50 mixture of Dex-Cool antifreeze and distilled water for the Cadillac DTS 2009's cooling system.
Insert the working key into the ignition and turn to 'On'. Turn back to 'Off' and remove the key. Quickly insert the new key and turn it 'On' within 10 seconds. The new key fob should now be programmed.