I have a 1997 gmc jimmy and both of the door lock switches stoped working except when they want to work

Yes, I would lean toward a stuck drivers door latch. Your door open switch is located in the latch itself and the ding is a reminder your key is in the ignition so you don't lock them in the vehicle when you lock the door. even though your door is shut, the truck still thinks it is open. sometimes spraying the latch with some WD-40 will get it freed up and working again, but a new latch might be in your future.

with key on door open, hold switch in down position and rap door panel with rubber mallet...if it works, need motor, if not, check switch for power

With key on door open, hold switch in down position and rap door panel with rubber mallet...if it works, need motor, if not, check switch for power out to motor

check for broken wire inside boot at door jam

Inspect or replace the window lock and unlock switch on the drivers door power window switch. There is a lock and unlock switch that will disable the switches to the other power window in the Jimmy. Check to make sure that switch is in the unlock position to have the other power window switch to work.
Thank you for suing fixya and good luck.

1998 and newer Jimmy's and Blazer's

1. Close all vehicle doors.

2. Insert the key into the ignition.
3. Hold down the power UNLOCK button on the driver’s door panel-continue to hold
down until instructed to release in step 9.
4. Perform steps 5 through 8 in fairly rapid succession.
5. Turn the ignition switch to the ON position (as far as you can go without starting the
engine).
6. Turn the ignition switch to the OFF position.
7. Turn the ignition switch to the ON position.
8. Turn the ignition switch to the OFF position.
9. Release the power unlock button on the door panel. The vehicle will lock and unlock
the doors automatically.
10. Hold down the LOCK and UNLOCK buttons on the transmitter simultaneously until
the door locks and unlocks.
This step may take up to 30 seconds.
11. Repeat step 10 NOW for each additional transmitter (including any existing
transmitters).
12. Turn the ignition switch to the ON position in order to exit the transmitter programming
mode.


Good luck and keep me posted, the 1997 was dome different.

For sure you could test it bypassing any switch and wiring but my guess is that the motor went bad. Not a very expensive part.
Hope it will help
Dan

Check the wires that go to your wheels for the ABS. They are probably bare from stones hitting them, and shorting out the system.

Usually just a dirty switch. Take it out, take it apart and clean it with some electrical cleaner, or get a new switch.

I work on these all the time, Your switch is bad Drivers door, go pick one up at a wrecking yard is the cheapest way, We do this daily, Or go to car-parts.com and order it