1998 GMC Savana Van Owner's Manual - Page 87

Theft It canbe dangerous to drive with the rear doors (CO) gas can open because carbon monoxide come into your vehicle. You can't see or smell CO. It can cause unconsciousnessand even death. If you must drive with the rear doors open or if electrical wiring or other cable connections must pass through the seal between the body and the rear doors: Make sure all windows are shut. 0 Turn the fan on your heating cooling or system to its highest speed with the setting BLEND or DEF. on VENT, HEAT, Additionally, on vehicles with heatindair conditioning systems,NORM A/C or BI-LEVEL A/C can beused. 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, open them all the way. See "Engine Exhaust" in the Index. Vehicle theft is big business, especiallyin some cities. Although your vehicle has a number of theft-deterrent features, we know that nothing we put on it canmake it you impossible to steal. However, there are ways can help. Key in the Ignition If you leave your vehicle with the keys inside, it's an easy target for joy riders or professional thieves -- so don't do it. When you park your vehicle and open the driver's door, you you'll hear a tone reminding to remove your keyfrom the ignition and take it with you. Always do this. Your steering wheel will be locked, andso will your ignition and transmission. And remember to lock the doors. Parking at Night Park in a lighted spot, close all windows and lock your vehicle. Remember to keep your valuables out of sight. Put them in a storage area, or take them with you. 2-15