Code b3138 door lock circuit high on 05 Chevy Astor van what does that mean

I assume you checked bulb.
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under vehicle passenger side where engine meets trans almost inline with the passenger wheel

under vehicle passenger side where engine meets transmission almost inline with passenger wheel

Under throttle body. Take a can of carb cleaner(make sure you don't have plug wires breaking down) spray under throttle body if it changes the way the engine runs you found it. Egr and pcv are other less likely. Should be getting a lean code if you got a vacuum leak

It's probably a bad input to the BCM - body control module ! Have it checked for DTC'S - diagnostic trouble codes .
The automatic door lock function can only be enabled by the body control module (BCM) if the driver door open switch and door ajar switches are in the Closed state. For information on programming the automatic door locks, refer to Vehicle Personalization in Personalization.
DTC B3064 or B3069
DTC B3127
DTC B3128, B3133, or B3138
DTC B3132
DTC B3137
DTC B3272
Your best bet , take it to the chevy dealer . Unless you own a GM factory Tech 2 scan tool an have access to factory sevice repair info.
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The outputs to the door lock actuators are controlled by the body control module (BCM). When the BCM receives a lock input from a door lock switch, or a keyless entry transmitter, it applies battery positive voltage to the door lock actuator lock control circuit, a ground to the door lock actuator unlock control, and the driver door lock actuator unlock control circuits. When the BCM receives an unlock input from a door lock switch, it applies battery positive voltage to the door lock actuator unlock control, the driver door lock actuator unlock control circuits, and a ground to the door lock actuator lock control circuit . When the BCM receives an single Unlock input from a keyless entry transmitter, it applies battery positive voltage to the driver door lock actuator unlock control circuit and a ground to the door lock actuator lock control circuit to unlock the driver door. A second Unlock input from the transmitter applies battery positive voltage to the door lock actuator unlock control circuit, and a ground to the door lock actuator lock control circuit to unlock the passenger doors.

This diagnostic procedure supports the following DTCs:
• DTC B3128 Left Front/Driver Door Unlock Circuit High
• DTC B3133 All Door Unlock Circuit High
• DTC B3138 All Door Lock Circuit High

is the handle real easy to turn , is it locked the little clip inside the door panel fell off this is a common problem with the doors , pull the panel off the door , make sure the door is unlocked first , I seen this happen before ,

it's under the interior cover , it need to come out, then the MAP is to the right of the radio ...it looks like this. hope this helps

Depending on what motor you have.The 2.5 is 60 thousands and the 4.3 is 35 thousands.Hope this helps.Good luck.

instrument lamp fuse. 10 amp labled INSTR LPS left side ,up under dash. if its good, the headlamp switch could be bad or the reostat for the lamps.

if you mean for power locks the same power lock activates all the locks