How to Jump Start a Buick Cascada

1. Check that the other vehicle has a 12-volt battery with a negative ground system, and park the two vehicles so they do not touch.
2. Set the parking brake firmly and put the shift lever in P (Park) with an automatic, or Neutral with a manual transmission.
3. Turn the ignition off, and turn off all lights and accessories in both vehicles, except hazard warning flashers if needed.
4. Connect one end of the red positive (+) cable to the positive (+) terminal on the discharged battery.
5. Connect the other end of the red positive (+) cable to the positive (+) terminal of the good battery.
6. Connect one end of the black negative (–) cable to the negative (–) terminal of the good battery.
7. Connect the other black negative (–) end to the grounding point for the discharged battery, such as the engine block or an engine mounting bolt.
8. Start the good vehicle and idle it at least four minutes, then try starting the dead vehicle.

• The positive jump start connection on the discharged battery is under a trim cover; open the cover to expose the terminal.
• Remove the cables by reversing the connection sequence exactly, then let the started vehicle idle for several minutes.
• If the vehicle will not start after a few tries, it probably needs service.

Source: 2019 Buick Cascada owner's manual, PDF pages 240, 241. 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.