1993 GMC Suburban Owner's Manual - Page 82

It isdangeroustogetoutofyourvehicle if the shift lever in P (Park)withtheparkingbrakefirmlyset.Yourvehiclecan is notfully roll. Don'tleaveyourvehiclewhentheengineisrunningunlessyouhave move to. If youhavelefttheenginerunning,thevehiclecan suddenly.Youorothers couldbeinjured. To besureyourvehicle won'tmove,whenyou're onfairlylevelground,alwayssetyour parkingbrakeandmovetheshiftlever to P (Park). If youhavefour-wheeldrive,yourvehicle will befreetoroll-even if yourshiftleverisin P ,(Park)-if your transfer case is in N (Neutral). So, besurethetransfercaseisinadrivegear-not N (Neutral). If youareparkingonahill,or See"ShiftingIntoPark"intheIndex. if you'repullingatrailer,alsosee"ParkingonHills"or"Towinga Trailer"intheIndex. 8 R (Reverse) Use this gear to back up. Shifting to R (Reverse) while your vehicle is movingforward couid damage your transmission. Shift to R (Reverse) only after your vehicle is stopped, To rockyourvehiclebackandforthtogetoutofsnow,iceorsandwithout damagingyourtransmission,see "If You'reStuck: InSand,Mud,Iceor Snow" in theIndex. Q N (Neutral) In this setting, yourenginedoesn'tconnectwiththewheels. you'realreadymoving,use beingtowed. To restartwhen M (Neutral)only. Also, use N whenyourvehicleis Shiftingout of P (Park)or N (Neutral)whileyourengine is "racing" (runningathighspeed)isdangerous.Unlessyourfootisfirmlyon thebrakepedal,yourvehiclecouldmoveveryrapidly. You couldlose controlandhitpeopleorobjects.Don'tshiftout of P (Park) or W (Neutral)whileyourengineisracing. I 2-1 a