1997 GMC Safari Owner's Manual - Page 92

3. If your engine still won't start (or starts but then stops), wait 15 seconds and start over. When the engine starts,let go of the key and the accelerator pedal. Engine Coolant Heater (Option) In very cold weather, 0°F (-18OC) or colder, the enginecoolant heater can help. You'll get easier starting and better fuel economy during engine warm-up. Usually, the coolant heater should be plugged in a minimum of four hours prior to starting your vehicle. NOTICE: Your engineis designed to work with the electronics in your vehicle. If you add electrical parts or accessories, you could change way the the engine operates. Before adding electrical equipment, check with your dealer. If you don't, your engine mightnot perform properly. If you ever haveto have your vehicle towed, see the part of this manual that tells howto do it without damaging your vehicle. See "Towing Your Vehicle" in the Index. To Use the Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. 3. Plug it into a normal, grounded 110-volt AC outlet. Fuel Regulator You have a fuel regulator that shuts the fuel off when the engine reaches 5,600 rpm.