1994 GMC Suburban Owner's Manual - Page 210

6. 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. Dead Battery (+) Good Battery (+) 7. 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. 8. Now connect the black negative (-) cable to the good battery's negative (-) cable. Don't let theother 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 of the vehicle with the dead battery. Good Battery (-) Heavy Metal Engine Part 5-6