1999 Chevrolet Tahoe Owner's Manual - Page 79

yellowblue Tailgate Glass and Tailgate CAUTION: It can be dangerous to drive with the tailgate glass, tailgate or rear doors open because carbon 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 rear doors open or if electrical wiring or other cable connections must pass through the seal between the body and the tailgate glass, tailgate or rear doors: D Make sure all other windows are shut. D Turn the fan on your heating or cooling system to its highest speed with the setting on VENT. That will force outside air into your vehicle. See "Comfort Controls" in the Index. D If you have air outlets on or under the instrument panel, open them all the way. See "Engine Exhaust" in the Index. If your vehicle has a tailgate, you must raise the rear glass before lowering the tailgate. To open the glass from the outside, use your key. With the key in the lock, turn the key clockwise to release the glass, then lift it up. To release the glass from the inside, use the electric tailgate glass release switch on the instrument panel. For more information, see "Tailgate -- Electric Glass Release" in the Index. To open the tailgate, lift up on the handle while pulling the tailgate toward you. Close the tailgate before closing the rear glass. After closing the tailgate, make sure the tailgate is securely latched by pulling it toward you. After closing the rear glass, pull up on its handle to make sure it is locked. Panel Doors To open the rear panel doors, you must open the passenger's side panel door first. If the door is locked, insert your door key in the lock and turn it counterclockwise to unlock it. To open the passenger's side panel door, pull up on the handle and pull the door open. 2-9