1994 GMC Suburban Owner's Manual - Page 72

Driving In Snow (Diesel Engines) When driving in a heavy snowstorm or in swirling snow with a diesel engine, snow can get into the air intake system. If you keep driving in these conditions the air cleaner may get plugged, causing black smoke and loss of power. In an emergency, if the air cleaner gets plugged with snow, you can remove the air cleaner. Then, drive to a place of safety as soon as possible and put the air cleanerback on. Starting Your Diesel Engine Your diesel engine startsdifferently than a gasoline engine. 1. Automatic Transmission: Move your shift lever to "P" (Park) or"N" (Neutral). Your engine won't start in any other position - that's a safety feature. To restart when you're already moving, use "N" (Neutral) only. - NOTICE: Don't try to shift to "P" (Park) if your vehicle is moving. If you do, you could damage the transmission. Shift to "P" (Park) only when your vehicleis stopped. 2. Manual Trunsmission: Move your shift lever to neutral and hold the clutch pedal to the floor while starting the engine. Your vehicle won't start if the clutch pedal is not all the way down - that's a safety feature. Turn your ignition key to RUN. Don't turn it to START. With the ignition in RUN, the "GLOW PLUGS" light will come on. If the engine is already warm, this light may not come on. That's normal. During starting, your "GLOW PLUGS" light may go on and off a few times. This is normal. This means that part of your engine is being warmed up for better starting. When the light goes off, your engine is ready to start. Do not start the engine with this light on. NOTICE: If the "GLOW PLUGS" light stays on, means that your it vehicle could have one several problems,so you should have of ~t serviced right away. 2-16