2002 Buick LeSabre Q&A

2002 Buick LeSabre Question: What would keep the coolant resevoir from flowing to the radiator?

The coolant will only flow to the radiator when I remove the radiator cap. The engine is losing coolant but there is no evidence of a leak in the hoses or the radiator. I suspect the intake manifold or head gasket. The radiator is bone dry after even a short trip to work and back (10 miles). The resevoir remains full until I open the cap on the radiator, then the coolant flows freely. -
Answer 1
Don't drive it .recommend towing it to a reputable shop for proper diagnosis. Sounds like it might be best to see what it's doing first-hand. -
Answer 2
have the cooling system pressure tested at a good repair shop -
Answer 3
Ziptie and Global Helper are correct to not dive and have it checked. -