More than likely your motor for your window is worn out and needs to be replaced, happened to me . Easy enough to fix. good luck
Pontiac Montana was created in 1999.
Cam sensor location 02 pontiac montana 3.4
1999 Pontiac Montana drivers side power window down wont go up. New motor and different switch (used, may not be good), installed. Window still wont go up. Switched wires in plug at motor and motor does reverse when not installed in door. How does motor switch polarity? Is it done in the switch? I cant find any limit switches. I do not have a schematic of system. Thanks RP
with explosives
215/70R15
alternator
p134
For a Pontiac Montana the battery is a group 78. Follow this link for dimensions.http://www.rtpnet.org/teaa/bcigroup.html
To bypass the window switch on a 1999 Pontiac Montana, you can use a jumper wire to connect the window motor directly to the power source. First, remove the door panel to access the window motor and locate the motor's power wires. Then, carefully connect the jumper wire to the appropriate terminals on the motor, allowing you to raise or lower the window manually. Exercise caution to avoid short circuits or damaging the motor.
drums
You can find the oil pressure sensor for your 1999 Pontiac Montana on the front of the engine. The low pressure oil sensor will be just below the left cylinder head.
If it looks the same it will probably work.