Buick Q&AAsk Your Question
2004 Buick Rainier Question: what does it mean when my 2004 Buick Rainier says coolant to hot
Answer #1patrick mannion from Greg Solow's Engine Room, June 15, 2011, 20:21Master
Explanation should be in you owner's manual, I am afraid I am not experienced with the Rainier. Check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/
Answer #2mastertech6371 June 15, 2011, 20:49Master
it is most likely overheating. you should get it checked asap before you do internal damage to the motor.
check the coolant level to see if you need to add.