1994 GMC Jimmy Owner's Manual - Page 219

5. Put the cap back on the coolant recovery tank, but leave the radiator pressure cap off. 6. Start the engine and let it run until you can feel the upper radiator hose getting hot. Watch outfor the engine fan. 7. By this time the coolant level inside the filler neck may be lower. If the level is lower, add more the proper mix throughthe filler neck until of of the level reaches the base the filler neck. I 8. Then replace the pressure cap. At any time during this procedure if coolant beginsto flow out of the filler neck, reinstall the pressure cap. Be sure the arrows on pressurecap line up like this. 5-17