1995 GMC Yukon Owner's Manual - Page 241

I NOTICE: Ignoring these steps could result in costly damage to your by vehicle that wouldn't be covered your vehicle warranty. Trying to start your vehicle by pushing or pulling it could damage your vehicle, evenif you have a manual transmission. transmission, it won't start that And if you have an automatic way. i To Jump Start Your Vehicle 0 Check the other vehicle. It must have a 12-volt battery with a negative ground system. I If the other system isn'ta 12-volt system witha negative ground, both vehicles can be damaged. If you have a diesel engine vehicle with two batteries (or more), you should know before you begin that, especially cold weather, you may in get battery in another not be able to enough power from a single vehicle to start your diesel engine. If your vehicle has more than one battery, use thebattery that's on the passenger sideof the vehicle- this will reduce electrical resistance. Get the vehicles close enoughso the jumpercables can reach, but be sure the vehicles aren't touching each If they are, it could cause a other. ground connectionyou don't want. You wouldn't be able to start your vehicle, and the bad grounding could damage the electrical systems. firmly on You could be injured if the vehicles roll. Set the parking brake in each vehicle. Put an automatic transmission PARK (P) or a manual transmission in NEUTRAL 0. have a four-whee14rive vehicle, be I you f sure the transfer case is not NEUTRAL (N). in 5-3