1997 GMC Suburban Owner's Manual - Page 83

Tailgate Glass and Tailgate If your vehicle has a tailgate,you must raise therear glass before lowering tailgate. the It can be dangerous to drive with the tailgate glass, tailgate or reardoors open becausecarbon monoxide (CO) gas can come into your vehicle. You can't see or smell CO. It can cause unconsciousness and even death. If you must drive with the tailgate glass, tailgate or reardoors open or if electrical wiring or othel cable connections must pass through the seal between the body and the tailgate glass, tailgate or rear doors: Make sure all windows are shut. Turn the fan on your heating or cooling system to its highest speed with setting the on VENT. That will force outside air into your vehicle. See "Comfort Controls" in the Index. If you have air outlets on or under the instrument panel, openthem all the way. See "EngineExhaust" in the Index. To open the glass from the outside, your key. With use the key in the lock, turn the key clockwise torelease the glass, then lift it up. To release the glass from the inside,use the electric tailgate glass release switch on the instrumentpanel. For more information, see "Tailgate -- Electric Glass Release" in the Index. To open the tailgate,lift up on the handle while pulling the tailgatetoward you. Close the tailgate before closing the rear glass. After closing the tailgate, make sure the tailgate securely is latched by pulling it toward you. After closing the rear glass, pull up on its handle to make sure is locked. it 2-9