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2005 Buick Rendezvous - Page 5 Questions & Answers
I was stopped and pushing on the brake when the brake went to the floor and now I have no brakes.
Check your brake lines. It seems that one of the lines burst or cracked. Also check the brake diverter box it's the box that the lines run to under the vehicle and disperses the pressure for the abs. Also check fluid level in the master cylinder it could just be low. One more thing to check is look at the inside of tires where the brake calipers are and check for fluid. If you can see fluid or inside of tire is wet you have a bad caliper.
Over heating and blowing cold air from heater
Possibly leaking head gasket. Easiest way to check would be to fill radiator full, start engine and watch coolant level in the radiator cap opening. The top radiator hose will become hot when thermostat begins to allow coolant flow through the radiator. You may have to top off the coolant. Still with the radiator cap off watch for water belching out of the radiator neck. If coolant does belch out of the radiator cap neck, refill with water. If it belches out coolant again it would be combustion gassed forcing the coolant out of the radiator.
This process should take about 1/2 hour to diagnose if it is a head gasket leaking combustion gasses into the coolant.
The radiator fan may run once car is shut off to cool engine compartment to prevent gasoline in fuel lines from vaporizing which would cause a condition called "vapor lock". A car won't start if fuel lines are vapor locked.
Good luck, I hope this helps you to figure out the problem.
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