1993 GMC Jimmy Owner's Manual - Page 134

Featmes & Controls' vehicle'sfunctions. As you wil see in the details on the next few pages, somewarninglightscomeonbrieflywhenyouturntheignitionkeyjusttolet I youarefamiliarwiththissection,youshouldnot f youknowthey'reworking. bealarmedwhenthishappens. Gages can indicate when there may be or is a problem with one of your vehicle'sfunctions.Oftengagesandwarninglightsworktogether knowwhenthere'saproblemwithyourvehicle. to letyou Whenoneofthewarninglightscomesonandstaysonwhenyouare driving,orwhenoneofthegagesshowstheremay be a problem, check the it. Pleasefollowthemanual'sadvice. section that tells you what to do about So pleasegetto Waitingtodorepairscanbecostly-andevendangerous. know your warning lights and gages. They're a big help. Brake System Warning Light Standard Cluster . . PO158 Yourvehicle'shydraulicbrakesystem is divided into two parts. I onepart f stop you. For goodbraking, isn'tworking,theotherpartcanstillworkand I thewarninglightgoeson,there f though,youneedbothpartsworkingwell. couldbe a brakeproblem.Haveyourbrakesysteminspectedrightaway. start the vehicle. I it doesn't come on f This light should come on as you then,have it fixed so it will be ready to warnyou if there's a problem. wil stay This light wil also come on when you set your parking brake, and I it stays on after your parking f on if your parking brake doesn't release fully. brake is fullyreleased, it meansyoumayhaveabrakeproblem. If thelight 2-74