1995 GMC Yukon Owner's Manual - Page 244

Good Battery (-) Heavy Metal Enaine Part 0 Attach the cable at least inches (45 cm) away from the dead 18 battery, but not near engine parts move. The electrical connection is just as that good there,but the chanceof sparks getting back to the battery is much less. Now start the vehicle with the good battery and run the engine for awhile. Try to start the vehicle with the dead battery. If it won't start aftera few tries,it probably needs service. Remove Cables in this Order: 2 3 1. Heavy Metal Engine P r at 2. Good Battery (-) 3. Good Battery (+) 4. Dead Battery (+) Remove the cablesin reverse order to prevent electrical shorting. Take care thatthey don't touch each otheror any other metal. 5-6