2010 Buick LaCrosse Owner's Manual - Page 358

9-78 Vehicle Care Notice: If you leave the radio or other accessories on during the jump starting procedure, they could be damaged. The repairs would not be covered by the warranty. Always turn off the radio and other accessories when jump starting the vehicle. 4. Turn the ignition to LOCK/OFF and switch off all lights and accessories in both vehicles, except the hazard warning flashers if needed. { WARNING 1. Check the other vehicle. It must have a 12-volt battery with a negative ground system. Notice: If the other vehicle's system is not a 12-volt system with a negative ground, both vehicles can be damaged. Only use vehicles with 12-volt systems with negative grounds to jump start your vehicle. 2. Position the two vehicles so that they are not touching. 3. Set the parking brake firmly and put the shift lever in P (Park). See Shifting Into Park on page 8‑24. An electric fan can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.