1998 GMC Sonoma Owner's Manual - Page 81

4. Before starting the engine, be sureto unplug and store thecord as it was before to keep it away from moving engine parts. If you don't, itcould be damaged. How long should you keep the coolant heater plugged in? Theanswer depends on the outside temperature, the of kind of oil you have, and some other things. Instead trying to list everything here, we ask that you contact your dealer in the area where you'll be parkingyour vehicle. The dealer give you the best advice for can that particular area. PARK (P): This locksyour rear wheels. It's the best position to use when you start your engine because your vehicle can't move easily. Automatic Transmission Operation Your automatic transmissionhas a shift leveron the steering column. There are several different positions foryour shift lever. It features an electronic shiftposition indicator within the instrumentcluster. This display must be powered anytime the shift lever is capable of being moved out of PARK (P). This means that if your key is in the OFF position, but not locked, there will be a small current drain on your battery which could dischargeyour battery over aperiod of time. If you need to leave your key in the ignitionin OFF for an extended period,it is recommended thatyou disconnect thebattery cable from the battery prevent discharging your battery. to It is dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brakefirmly set. Your vehiclecan roll. Don't leave your vehicle whenthe engine is running unless you have to. If you have leftthe engine running, the vehicle can move suddenly. You or others could beinjured. To be sure your vehicle won't move, even when you're on fairly level ground, always setyour parking brakeand move the shift lever to PARK (P). See "Shifting Into PARK (P)" in the Index. If you're pulling a trailer, see "Towing a Trailer" in the Index. 2-17