1997 GMC power window problems. Passenger window goes down but not up. Replaced both switches. Driver side works ok but the driver side switch will not operate the passenger side window

Could be the driver side switch. there is a power pass thru in the driver controls that if the contacts get corroded will start to cause slow and intermittent operation. Measure the voltage at the motor while actuating both the driver and passenger controls for the problem window. Also, while actuating the passenger side switch, jiggle the driver control switch to see if any change can be affected.

was regulator bad? did it work from drivers side switch before you did regulator repair?..if so passenger side switch wiring has issue and is not sending signal through it back to the drivers side master switches.. otherwise you need to pin test for power up power down on drivers side switch and repair that if issue going to the window on passenger side.. (possible pinched at door jam area common)

Before you replace anything, inspect the connector pins in both the driver's door switch and the passenger door switch. If you don't find any problem with these connector pins, replace the driver's door control switch.

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The passenger side is powered thru the driver's switch, so I would start with checking for power and ground at the driver's switch.
Could be the master switch or a problem in the harness between the driver's door and the cab. There may also be a relay for the windows in the engine compartment.

Check the wires on the driver's door between the door and the post. A break in a wire will affect the passenger side.

Is it TRYING to go up but can't? You could have high resistance in the ground circuit to the passenger switch. It takes a LOT less power to move the window down than it does to make it go up. There mak be good enough ground to the switch to make it go down, bt not up.

Since it works from the driver's door, this pretty much eliminates the B+ circits and the grounds for the driver's switch. Since the passenger switch itself has been replaced twice, I would think that eliminates the switch itself as the cause. The ground circuit to the passenger switch is the only thing left.

This theory can be easilly verified by running a jumper from Pin "J" BLACK wire at the passenger switch t the battery negative post. If the window now goes up and down from the passenger switch, the ground circuit needs to be repaired.

Your problem is likely in the master switch on the driver side. Try getting a drivers door switch from the junkyard. I have a 96 Silhouette that I experienced the same problem with. After changing out the motor, and the passenger switch I finally traced it to the master switch. Power goes to the drivers door switch first and then over to the passenger door. It could actually be both switches. A bad relay would affect both windows not just the one side.

I have the same problem. I just replaced the switch ($60 from the Internet) Easy replacement, but the problem persists, Here is my next plan of attack... The PCM (vehicle computer controls the power windows for your vehicle. check the power window relay under the hood before repairing PCM. Also the cheapest way is to call local garage and ask if they have a TECH2 scanner to talk to the PCM. The Dealer will charge you about $95hr. to do this.

The same thing happened to my 1999 JMC Jimmy recently. I believe the problem is that your power window motor has most likely gone out or is starting to go out. The motor will need replaced. They are pretty expensive new. I went to a junkyard and got one for around 15 dollars. When mine went bad, I had rolled my window down about three or four inches and it stuck there. I took my door panel off and tapped on the motor while holding up on the window switch and got it to go up after a few minutes. I am replacing my motor today, I'll leave an update here about the outcome when I finish the job. I hope this information helps you.

I had a similar problem in my 1993 Safari. Problem turned out NOT to be a switch, but a broken wire in the driver side door opening between the door and the frame. I found a cut in the wiring insulation, and it corroded, breaking. This disabled the window control.