1999 GMC Sierra 1500 Pickup Owner's Manual - Page 78

Features & Controls New Vehicle "Bmak-Rn99 1 NOTICE Jr modernvehicledoesn'tneedanelaborate"break-in."Butitwill perform better in the long run if you follow these guidelines: Keepyourspeedat (804 km). 55 mph (88 kmlh)orlessforthefirst 500 miles Don'tdriveatanyonespeed-fastorslow-forthefirst (804 km).Don'tmake full-throttle starts. 500 miles Avoidmakinghardstopsforthefirst 200 miles (322 km)or so. During this time your new brake linings aren't yet broken in. Hard stops with new linings can mean premature wear and earlier replacement.Follow this "breaking-in" guideline every time you get newbrakelinings. Ifyouhave a 3500 HD Model,see"ParkingBrake"intheIndex. Ignition Switch Useyoursquarekey to startyourvehicle.Thesquarekeyletsyouturnthe ignition switch to fivedifferentpositions: 6 RUN 1 KO404 Acc (Accessory): Acc lets you usethingsliketheradioandthewindshield it wiperswhentheengine is off. To getinto Acc, pushinthekeyandturn towardyou. Your steeringwheelwillremainlocked,justas it was beforeyou insertedthe key. 2-1 0