How to Jump Start a Cadillac CELESTIQ

1. Check that the other vehicle has a 12-volt battery with a negative ground system, and park the vehicles close but not touching.
2. Set the parking brake on both vehicles and put them in P (Park), then turn off both vehicles and unneeded accessories.
3. Open the liftgate, lift the load floor, remove the driver side storage bin, and take the cover off the positive terminal.
4. Connect one end of the red positive (+) cable to the discharged battery positive (+) terminal, then the other end to the good battery positive (+) terminal.
5. Connect one end of the black negative (−) cable to the good battery negative (−) terminal.
6. Connect the other end of the negative (−) cable to the discharged battery negative (−) grounding point.
7. Start the vehicle with the good battery and let it run for a while, then try to start the vehicle with the dead battery.

• To remove the cables, reverse Steps 11–14 in exact order.
• If it will not start after a few tries, have your vehicle serviced.
• After starting, let the vehicle idle for several minutes.

Source: 2026 Cadillac CELESTIQ owner's manual, PDF pages 331, 332, 333. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.