How to Jump Start a Buick Regal

1. Make sure the other vehicle has a 12-volt battery with a negative ground system, and position the two vehicles so they do not touch.
2. Set the parking brake firmly and shift to P (Park), then turn the ignition off and switch off all lights and accessories in both vehicles.
3. Connect one end of the red positive (+) cable to the remote positive (+) terminal on the discharged battery, which is under a cover.
4. Connect the other end of the red positive (+) cable to the positive (+) terminal of the good battery.
5. Connect one end of the black negative (–) cable to the negative (–) terminal of the good battery.
6. Connect the other end of the black negative (–) cable to the remote negative (–) ground terminal for the discharged battery.
7. Start the engine of the vehicle with the good battery and let it idle for at least four minutes.
8. Try to start the vehicle with the dead battery, and remove the cables by reversing the connection order exactly.

• Hazard warning flashers may stay on if needed while jump starting.
• If the vehicle will not start after a few tries, it probably needs service.
• After removing the cables, let the started vehicle idle for several minutes.

Source: 2020 Buick Regal owner's manual, PDF pages 309, 310. 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.