1999 grand am gt 3400 v6

http://www.2carpros.com/forum/automotive_pictures/62217_Vac_Diagram_31_34_1.jpg

Check the next diagram (click HERE for image zoom)...



Fig. Powertrain control module (3) inside air cleaner housing in left side of engine compartment, showing the C2 connector (1), C1 connector (2), air cleaner housing (4), wiring harness (5), and forward lamp ground (6) (zoom in THIS LINK)

Hope this helps (remember to rating and leave some testimonila comment about this free answer).

what engine u may have water pump rad.or head gaskit problem.

check the egr system,

check crankshaft and camshaft sensors. If faulty they may cause misfires, poor fuel mileage, stalls, hard starts. Make sure the ignition coil is ok, including its powers circuit. hopefully this helps!!

i'm guessing this is a V6 3400 since the headline is a 2000 Grand Am GT
44 LB FT plus 95 degrees

I would almost bet you have a blown head gasket or a cracked head. White smoke at the exhaust, loosing coolant, moisture on the underside of the oil fill cap, and on the dip stick are all signs of a blown gasket. The fact that there is no coolant in the oil does not mean it does not have a blown gasket. To find out for sure remove all spark plugs, disconnect the coil wire, and then run a compression test on all cylinders. If you find one or more with low compression you have a blown gasket. Do not drive this car any longer until you get this repaired. Serious engine damage will occur if you continue to drive it.

The Blower motor (heater fan) is under the dash on the passenger side of the car. there is a panel that has to be removed to get at the fan and can be removed with a small pry bar and patience. before the fan gets removed, check the fuses first, also check the motor by disconnecting the wires going to it and putting power directly to it (this will take some small wires to do). By doing all of this, you will determine if the blower motor is actually the problem. if the fan works when it has direct power, then the problem is someplace else.

its on the passenger side under the hood on the firwall. its the only motor over there i think 3 screws hold it in place and its not hard to change out

The 3400 is notorious of the head gaskets blowing. this may not be in your case. Check the level of the coolant. Their may be air in the heater core. bring it up to operating temp then check the level.

Hope it is just air in the system not the heads!