2003 GMC Sierra 1500 Pickup Owner's Manual - Page 429

7. Connect the red positive (+) cable to the positive (+) terminal of the vehicle with the dead battery. Use a remote positive (+) terminal if the vehicle has one. 9. Now connect the black negative (-) cable to the negative (-) terminal of the good battery. Use a remote negative (-) terminal if the vehicle has one. 8. Don't let the other end touch metal. Connect it to the positive (+) terminal of the good battery. Use a remote positive (+) terminal if the vehicle has one. 10. 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. 5-54