Sorry but i m not an installer just an owner trying to find a solution.
1998 chevy silverado door lock fuse.
The picture of where the power door lock relay is located is on page 261 of my 92 schematics 92 gm factory electrical diagram manual.
To remove fuses if you don t have a fuse extractor hold the end of the fuse between your thumb and index finger and pull straight out.
When i press any unlock button there is a clicking near in the interior fuse box.
Pull off the cover to access the fuse block.
Put a test light on the 15 amp lock fuse and press the.
Gmc sierra mk1 1999 1998 fuse box diagram.
So your truck is an obs gmt400 and you should be looking for info up to 1998 not 2000.
The fuse block access door is on the driver s side edge of the instrument panel.
Door lock relay in left fuse box.
You may have spare fuses located behind the fuse block access door.
Could the driver side control pod be the problem.
If they do not then you may have a bigger issue.
Since the door will unlock but won t lock it would seem to be a problem with the gray blk wire at the lock actuator.
These can be used to replace a bad fuse.
You can remove fuses with a fuse extractor which is mounted to the fuse block access door.
If you have a different schematics and it is not on that page look in the table of contents in the front for power door locks then turn to that section in my book starts at page 199 then under the component location heading it should list on what.
Door lock relay in left fuse box.
Niether door lock button will operate the locks but the key fobe remote will.
One of the easiest ways to diagnose the switch is by trying to use other door locks in the car.
1998 silverado crew cab puthe problem.
If they work then you ve narrowed down your problem.
Check the position 13 power amp cigarette lighter door lock relay power lumbar seat and a position power door lock six way power seat keyless entry module.
Pull off the cover to cover to access the fuse block.
The only way to get into the truck is using the actual key.
The diagram posted above does not apply to your truck.
If the driver door lock switch doesn t work try the passenger door lock switch or any other door.
The door lock relay is located under the center of the dash.
The power locks will lock just fine.
I read right past the c3500 part of your post.
Driver door unlock relay in left fuse box.
Instrument panel fuse block.
All unlock fuses have no power when i check them with the test light.
1998 silverado door lock.
Gmc sierra mk1 fuse box instrument panel.
