1998 GMC Savana Van Owner's Manual - Page 207

A CAUTION: Using a match near a battery can cause battery gas to explode. Peoplehave been hurt doing this, and some have been blinded. a flashlight if Use you need more light. Be sure the batteries have enough water. You don't need to add water to the ACDelco Freedom@ battery (or batteries) installed in every new GM vehicle. But if a battery has filler caps, be sure the right amount fluid is there. If of of it is low, add water to take care that first.If you don't, explosive gas could be present. Battery fluid contains acid that can burn you. Don't get it on you. If you accidentally get it in your eyes or on your skin, flush the place with water and get medical help immediately. 5. Check that the jumper cables don't have loose or missing insulation. If they do, you could get a shock. The vehicles could be damaged, too. Before you connect the cables, here are some basic things you should know. Positive (+) will go to positive (+) and negative (-) will go to an unpainted metal engine part or a body metal surface. Don't connect positive (+) to negative (-) or you will get a short that would damage the battery and maybeother parts, too. And don't connect the negative (-) to negative (-). Fans or other moving engine parts can injure you badly. Keep your handsaway from moving parts once the engine running. is I 5-5