2003 Chevrolet Impala Owner's Manual - Page 306

11. Try to start the vehicle that had the dead battery. If it won't start after a few tries, it probably needs service. To disconnect the jumper cables from both vehicles, do the following: 1. Disconnect the black negative (-) cable from the vehicle that had the dead battery. 2. Disconnect the black negative (-) cable from the vehicle with the good battery. 3. Disconnect the red positive (+) cable from the vehicle with the good battery. Notice: Damage to your vehicle may result from electrical shorting if jumper cables are removed incorrectly. To prevent electrical shorting, take care that the cables don't touch each other or any other metal. The repairs wouldn't be covered by your warranty. 4. Disconnect the red positive (+) cable from the other vehicle. 5. Return the remote positive (+) terminal cover to its original position. Jumper Cable Removal A. Heavy, Unpainted Metal Engine Part B. Good Battery or Remote Positive (+) Terminal C. Dead Battery or Remote Positive (+) Terminal 5-53