1998 Pontiac Bonneville Owner's Manual - Page 276
1998 Pontiac Bonneville Manual
Page 276 highlights
Checking Coolant - LOW COOLANT Adding Coolant If this light comes on, it means you'relow on engine coolant. If you need more coolant, add proper DEX-COOL@ the coolant mixture ut the coolant recovery tank, but be careful not to spill it. ~~~ ~~ When your engineis cold, the coolant level should at be the FULL COLD mark or a little higher. When your engine is warm, the level should be up to FULL the HOT mark or a little higher. lbrning the radiator pressure capwhen the engine andradiator are hot canallow steam and scalding liquids blow out and burn you to badly. With the coolant recovery tank, you will almost never have add coolant at the radiator. to Never turn the radiator pressure cap even a little when the engine and radiator are hot. -- -- 6-25