1994 GMC Safari Owner's Manual - Page 188

2. Get the vehiclesclose enough so the jumper cables can reach, but be sure the vehicles aren't touching each other. they are, it could cause a If ground connection you don't want. You wouldn't be able to start your vehicle, and the bad grounding coulddamage the electrical systems. You could be injuredif the vehicles roll.Set the parking brakefirmly on each vehicle. Put an automatic transmission in"P" (Park) or a manual transmission in "N" (Neutral). If you have a four-wheel-drive vehicle with a manual transfer case shift lever, be sure the transfercase is not in " N ' (Neutral). 3. T r off the ignition on both vehicles. Turn off all un lights that aren't needed, and radios.This will avoid sparks and help save both batteries. And it couldsave your radio! NOTICE: If you leave your radio on, it could be badly damaged. The repairs wouldn't be covered by your warranty. 4. Open the hoods and locate the batteries. Find thepositive (+) and negative (-) terminals on each battery. 5-4