1995 GMC Suburban Owner's Manual - Page 319

To Add Coolant If you need more coolant, add the proper m i x ut the s ~ ~ r rd p , ~ only - but when the engine is cool. If the surge tank is empty, see "Engine Overheating" in the Index for the propel-fill procedure. A CAUTION: You can be burnedif you spill coolant on hot engine parts. Coolant contains ethylene glycol, and it will burn if the engine parts are hot enough. Don't spill coolant aon engine. hot When replacing the pressure cap, make sure it is tight. Radiator Pressure Cap - Gasoline Engine The radiator pressure cap must be tightly installed with the awows o n the cap lined u p with the overflow tube on the radiator filler neck. Your radiator cap is a 15 psi (105 kPa) pressure-type cap and must be tightly installed to prevent coolant and possible loss engine damage from overheating. sure the arrows on the cap Be line up with the overflow tube the radiatorfiller neck. on 6-37