2003 Chevrolet Impala Owner's Manual - Page 305

Don't let the other end touch metal. Connect it to the positive (+) terminal location of the vehicle with the good battery. Use a remote positive (+) terminal if the vehicle has one. Don't let the other end touch anything until the next step. The other end of the negative (-) cable doesn't go to the dead battery. It goes to a heavy, unpainted metal part or to a remote negative (-) terminal on the vehicle with the dead battery. a. Now connect the black negative (-) cable to the negative (-) terminal location of the vehicle with the good battery. Use a remote negative (-) terminal if the vehicle has one. 9. Connect the other end of the negative (-) cable at least 18 inches (45 cm) away from the dead battery, but not near engine parts that move. The electrical connection is just as good there, and the chance of sparks getting back to the battery is much less. IO. Now start the vehicle with the good battery and run the engine for a while. 5-52