1999 GMC Sierra 1500 Pickup Owner's Manual - Page 256

1999 GMC Sierra 1500 Pickup Manual

Page 256 highlights

If theoverheatwarningcontinues,there'sonemorethingyoucantry. canaddthepropercoolantmixdirectlytotheradiator,butbesurethe do it. radiatoriscoolbeforeyou You ' Steamandscaldingliquidsfromahotcoolingsystemcanblowout I- andburnyoubadly.Theyareunderpressure,and if youturnthe radiatorpressurecap-evenalittle-theycancomeoutathigh speed.Neverturnthecapwhenthecoolingsystem,includingthe radiatorpressurecap,ishot.Waitforthecoolingsystemandradiator if you haveturn pressure ever to the cap. pressure to capcool I 1 . ... K2Jll How to Add Coolant to the Radiator 1. You canremovetheradiatorpressurecapwhenthecoolingsystem, includingtheradiatorpressurecapandupperradiatorhoseisnolonger left until it firststops.(Don't hot.Turn thepressurecapslowlytothe pressdownwhileturningthepressurecap.) If youhearahiss,waitforthat pressureleft. to stop. A hissmeansthereisstillsome 5-1 4

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