RE:Travis, It sounds like you may need a new control module. Module switches usually are non serviceable. If the knob does turn and it just won't switch from the rear. 3.73 gt4 drum brake rear end axle chevy s10 truck sonoma xtreme 55" long 2wd; 2004 vortec 5.3 v8 motor engine 4l60e auto pull out swap package chevy silverado. Hi I have a power locks problem on my 2002 chevy silverado. A week or so ago I was having a problem with my Drivers side door only locking once in a while. ![]() Hi I have a power locks problem on. Hiok you need to test for power at the passager switch, if no power at switch then check for power at the fuse box, if still no power then test for power at the relays. You could have a Fuse or a Relay bad, or Switch. If there is power going to the switch the switch is bad. Here is the wiring diagram with all the fuses and relays and how the current works. Now it is also possible your BCM might be bad if that is the cause you will have no power coming out of the BCM. The BCM is the Body Control Module is controls everything inside the car, like the power locks, power window, alarm, dash light, radio, wipers, head lights, wipers, cruise control, interior lights, odometer, anything you control insude the car is connected to the BCM. ![]() In some cause the BCM just need to be reprogrammed or other causes replaced. The only way to determain for sure is to use a special sofeware scan tool the dealer has or a speciality shop. A code reader will not work for this. Go ahead and start at testing for power at the switch first. Then go to the fuse box, then relays. There is a possiblity that you might have a broken wire so say for example you have power at the fuse box but no power to the switch, this means you have to follow the wire from the fuse box and all the way to the switch to find the broken wire. I know electrical is very time consumming but if you can do this you will save yourself alot of money by doing it yourself.
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