1993 GMC Suburban Owner's Manual - Page 294

1993 GMC Suburban Manual

Page 294 highlights

When you replaceyourradiatorpressurecap, an AC@ cap is recommended. Thermostat Engine coolant temperature is controlled by athermostat in theenginecoolant system. The thermostat stops the flow of coolantthroughtheradiator until the coolant reaches apresettemperature. Whenyoureplace your thermostat,an AC@ thermostat is recommended. 6-28

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