1993 GMC Suburban Owner's Manual - Page 231

6. Release the regularbrakes. It can be dangerous to getout of yourvehicle if theshiftleverisnot fully in P (Park)withthe parking brake firmlyset. Your vehiclecan roll. I If you have lefttheenginerunning, the vehiclecanmovesuddenly. You orothers could be injured. To be sure yourvehiclewon'tmove, whenyou're on fairly level ground,usethestepsthatfollow. If you havefour-wheeldrive and yourtransfercase is in N (Neutral), yourvehiclewill be free to roll,even if yourshiftlever is in P (Park). So, be surethetransfercase is in adrive gear-not in N (Neutral). If you are parking on a hill, or i you're pulling atrailer,alsosee f "Parking On Hills" in the Index. When kw Are Ready to Leave After Parking on B HW and hold the pedal downwhile you: Startyourengine. Shift into agear; and Releasethe parking brake. 1. Applyyourregularbrakes Q Q 2. l e t up on thebrakepedal. 3. Driveslowly until thetrailer is clear of thechocks. 4. Stop and havesomeonepick up and stowthechocks. Maintenance When Traikr Towing Your vehiclewill need servicemore often whenyou're pulling atrailer.See theMaintenanceScheduleformore on this.Thingsthatareespecially important in traileroperation are automatictransmissionfluid(don'toverfill), engineoil,axlelubricant, belts, coolingsystem, and brakeadjustment.Each of these is covered in thismanual, and theIndex will help youfindthem quickly. If you'retrailering,it's a good idea to reviewthesesectionsbefore you start your trip. Checkperiodicallytoseethat all hitch nuts and bolts aretight. 4-63