1995 GMC Yukon Owner's Manual - Page 76

A CAUTION: It canbe dangerous to drive with the tailgateglass, tailgate or rear doors open because carbon monoxide gas can come (CO) into your vehicle. You can't see or smell CO. It can cause unconsciousness and even death. I you must drive with the tailgate glass, tailgate or rear doors f open or if electrical wiringor other cable connections must pass through the seal between the body and the tailgate glass, tailgate or rear doors: 0 Make sure all windows are shut. Turn the fan on your heatingcooling system to its highest or on speed with the setting any function. Make sure the recirculation button is not pressed That will force outside in. air into your vehicle. See "Comfort Controls" in the Index. If you have air outlets on or under the instrument panel, open them all the way. See "Engine Exhaust" in the Index. Tailgate Glassand Tailgate 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 door 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 '*TailgateElectric Glass Release" i n the Index. 2-4