How to Jump Start a Buick Encore GX

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) or Neutral with a manual transmission.
3. Turn the ignition off and switch off all lights and accessories in both vehicles, except hazard flashers if needed.
4. Connect the red positive (+) cable to the discharged battery positive (+) terminal, then to the good battery positive (+) terminal.
5. Connect the black negative (–) cable to the good battery negative (–) terminal, then to the engine block or an engine mounting bolt far from the dead battery.
6. Start the good vehicle and let it idle for at least four minutes, then try to start the disabled vehicle.
7. Remove the cables by reversing Steps 6–9 in exact order, then let the started vehicle idle for several minutes.

• The discharged battery positive (+) terminal is under a trim cover; open the cover to expose it.
• Connecting or removing the cables in the wrong order can cause electrical shorting and damage not covered by the warranty.
• If the vehicle will not start after a few tries, it probably needs service.

Source: 2026 Buick Encore GX owner's manual, PDF pages 273, 274, 275. 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.