1999 GMC Sierra 1500 Pickup Owner's Manual - Page 85

Whenyourengineiscold,let it runforafewminutesbeforeyoumoveyour vehicle.Thislets oil pressurebuild up.Yourenginewillsoundlouderwhen it's cold. - NOTIP If you're not in an idling vehicleand the engine overheats,youwouldn't there to see the coolant temperature gage. This could damage your in vour vehicle. hicle. Don't let vourenainerunwhenyou'renot Cold Weather Starting (Diesel Engine) Thefollowingtipswillhelpyougetgoodstarting in cold weather. Use SAE IOW-30 oil when theoutsidetemperaturedropsbelowfreezing. 0°F (-18"C), useyourengine Whentheoutsidetemperaturedropsbelow blockheater. If youparkyourvehicleinagarage,youshouldn'tneedtousetheblock 0°F (-18"C), nomatterhow heater until thegaragetemperaturegoesbelow colditisoutside. To use the engineblockheater,first turn off theengine.Thenopenthehood, (110 unwraptheelectricalcordand plug it in. It usesnormalhousevoltage volts),but: 2-1 7