Your car may fall under the class action suit being settled by GM due to its requirement of the use of Dexcool. It forms a brown "sludge" that causes more damage to the car. My head gasket has had to be replaced twice in less than 3 years. Search for GM and Dexcool and see what you can find about the suit. Best of luck! Another possibility is that the fan is not running while the car is on. This can be fixed easily with a hot-wire under the hood of the car that bypasses electrical systems and makes sure the fan is blowing at all times when the car is on.
Poor preventative maintenance is a leading cause of vehicle breakdowns.
a bad sensor. the alero is notorius for many bad sensors. not an expensive replacement though
The RPMs and the engine of the 2001 Oldsmobile Alero might surge if there is a problem with the oxygen or fuel sensor. It may also surge if there is a problem with the fuel injectors or the fuel filter.
a cracked head
The Alero is made by Oldsmobile not Chrysler. My first suspicion would be a failed fuel pump or clogged fuel filter.
If the car has high miles, try checking the catalytic converter. If it is clogged it will cause the vehicle to lose power.
There can be many resons for this. A common cause for this is an air pocket in the cooling system if the 3.4l v6 engine. Air pockets can be cause by low coolant level, or more serious engine problems- I.E. leaking intake manifold gaskets, blown head gaskets.
There are a couple of reasons why a 1999 Oldsmobile Alero ac heater to stop working. The heater coil may need to be replaced or the HVAC blower motor may need to be replaced.
As with any car, low coolant will cause this car to overheat. Common areas of coolant lose are the water pump or intake manifold gaskets. If the coolant is full, then another common problem is blown headgaskets- especially the rear head. A blown headgasket introduced compression into the cooling system causing air pocket / bubbles. This will cause an overheat.- TechJK -----------------------------------------------------------
You will need be able to fix it as you need a machine that can cause a vacuum inside the system. You have to take it to a shop and it will be expensive.
Could be,blown fuse, bad blower motor, bad switch, bad resistor,
it could be numerous posibilities. i would have my timing checked, and also m vaccum hoses, there may be a leak.