1998 Chevrolet Express Van Owner's Manual - Page 205

If you have a diesel engine vehicle with two batteries (or more) you should knowbefore you begin that, especially in cold weather, you may not be to able get enough power from a single battery in another vehicle to start your dieselengine. NOTICE: If you leave your radio on, it could be badly by damaged. The repairs would not be covered your warranty. 4. Open the hoods and locate the batteries. Find the positive (+) and negative (-) terminals on each battery. If your vehicle has more than one battery, use the battery that is under the hoodof the vehicle - this will reduce theelectrical resistance. 2. Get the vehicles close enough so the jumper cables can reach, but besure the vehicles aren't touching each other. U they are, it could cause a ground connection you don't want. You wouldn't be able to start your vehicle, and the bad grounding could damage the electrical systems. To avoid the possibility of the vehicles rolling, set the parking brake firmlyon both vehicles involvedin the jump start procedure. Put your automatic transmission in PARK (P). 3. Turn off the ignition on both vehicles. Turnoff all lamps that aren't needed, and radios. This will avoid sparks and help save both batteries, and could save your radio. 'A CAUTION: An electric fan can start even when the engine up is not running and can injure Keep hands, you. from any underhood clothing and tools away electric fan. 5-4