The AC may stop working due to a refrigerant leak from the condenser - this is not uncommon in Montanas built between 2001 and 2003. GM has developed and updated condenser and mounting bracket to help prevent the replacement condenser from failing in the same manner.
I'm not sure why the dye isn't showing.
Usual cost of the fix is around $550.
SOURCE: 1999 pontiac grand prix . will not run
If wiggling the wires cured the code, then one of the wires is broken inside the insulation. Pull on each wire one at a time. look for the colored insulation to stretch, this will be the broken wire. For the other car that wont rev up, this is a common when the catalytic concverter is plugged up. This will also cause MAF codes, and in turn, TRAC OFF light.
See http://www.greatautohelp.com
SOURCE: Hi- I have a 1989 Pontiac 6000 LE station
WoW...There is an intelligent person out there!!! Most posts say "My car...its broke" Looks like you have really done some comprehensive testing. As you observed though, The problem you revealed may have more in common with a delay in starting. My first thought is that though you have pressure etc. Have you tested the fuel for contamination? Water (from condensation etc) can give you similar problems.You mentioned that you just filled the tank I wonder with what? Also how good is the spark, and is it firing when it should? Though I'm inclined to think less of that idea.
SOURCE: 2002 pontiac bonneville problem
I had the same problem, I held the reset button in for over a minute and it finally seemed to reset. It has been about a month and the light has not come back on. Yet! Good Luck
SOURCE: 2001 Montana Low oil pressure message
It is possible,look at the oil pressure switch,and see if it is still plugged up good.Also,it might be leaking,if so,replace it.You might replace it any way to make sure the sending unit is reading correctly,If it is not a loose plug on the oil sending unit.It should be right next to the oil filter kinda long.
SOURCE: Pressure Control Solenoid P2716
have the code checked especially if the car is out of warranty. If it is still under warranty take the car to the dealership
. The Pressure Control Solenoid determines the quality and accuracy of the shift points and if you let it go the transmission will not shift properly after a period of time.
The pressure control solenoid is used by the PCM to raise the mainline hydraulic pressure during high throttle - this increases the holding force on the clutches and bands and prevents slipping. The pressure control solenoid is controlled by pulses from the PCM and this in turn operates the boost valve insde the valve body.
The problem could be either in the PCM or it could be an electrical problem with the solenoid. As suggested it should be diagnosed by a transmission tech. They can check if the PCM is good by looking at the pulses with an oscilloscope at the connector and they should also be able to test the continuity of the solenoid. If the solenoid is faulty the valve body will need to be removed and the solenoid replaced.
good luck
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