1994 Pontiac Grand Am Owner's Manual - Page 161
1994 Pontiac Grand Am Manual
Page 161 highlights
Problems on the Road . . How to Add Coolant to the Coolant Surge Tank(CONK) 1. You can remove the coolant surge tank pressure cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly about one-quarter turn to the left and then stop. 2. Then keep turning the pressure cap slowly, and remove it. . Once the pressure cap is off, look inside the surge tank opening and look for a small cylinder at the base the of opening. This should be covered with coolant. If the cylinder is uncovered, the coolant in your system is low. Fill the coolant surge tank with the proper mix, up to FULL COLD, or just above the small cylinder at the base of the opening. If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left. ...160