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Does it move at all up and down? These mirrors commonly get stuck from not being moved very often. Use your hand to force it up and down. (it will make a grinding noise, no worries, it doesn't hurt the mirror.) Try it again. If it still won't move. Check the other side. if it does the same thing, the master switch is burned out. Otherwise you may need a new motor. (Yes, motor, not the whole mirror. They are available separately) Or just pick up a good used one. Good luck.
Can you hear anything coming from the mirror? Is only one working? If so, its possible that your mirror motor has died on you. If you're not hearing anything from both sides, I would check the fuse and voltage going to the fuse. If that's good then you could either check wiring from mirror motors to the module. I believe the controller is the general module located under the front passenger kick panel. Or you could also swap out the switch block for the mirror assembly as you could return that. Replacing the programming the GM will burn it to your vehicle.
You will probably need that side mirror as the motor has failed. The motor in the mirror will control both directions, but sometimes loses the ability to control either up/down or in/out. Check the other side if it also doesn't adjust side to side I'd then suspect the mirror switch.
If the mirrors only move down and not up I would suspect the mirror switch , the mirrors use one motor to move the glass up and down,and another motor to move them in or out , and if the mirrors move down the motors are working.the only other possible problem would be a wiring but highly unlikely due to the fact that the turning the motors in a different direction is done by switching the polarity to the motor which requires both wires to be good to make the motors move in the down direction ..check the mirror switch I am sure you"ll find that"s your problem
The power mirrors are controlled by a module (computer) DDM - drivers door module an the PDM - passenger door module .
Folding Mirror System
Folding Mirror System Controls
The folding mirror system requires signals from 2 separate switches. The mirror select switch must be in the neutral/fold position and the mirror direction switch must be activated to the left/extend or right/retract positions. Both switches are integrated into the DDM and provide direct signals.
Folding Mirror System Operation
Upon receipt of the required switch inputs the DDM will supply battery voltage and ground to the mirror fold motor control circuits to perform the requested extend or retract function. The DDM will also send a class 2 message to the PDM indicating the requested function. The PDM will supply battery voltage and ground to the mirror fold motor control circuits to perform the requested extend or retract function.
Power Mirror System
Power Mirror System Components
The power mirror system consists of the following components:
• The driver door module--Class 2 module with integrated switches and requires programming when replaced
• The passenger door module--Class 2 module with integrated switches, requires programming when replaced and also contains the RFA receiver
• The power mirror direction switch--Integrated into DDM and is a 4-position momentary switch that provides a signal input to the DDM for up, down, left/extend and right/retract with a mirror switch activation
• The mirror select switch--Integrated into DDM and is a 3-position switch that allows the operator to select the left or right mirror and also a neutral/fold position
• The left outside power mirror--Contains both the vertical and horizontal mirror motors and is serviced as a complete mirror assembly
• The right outside power mirror--Contains both the vertical and horizontal mirror motors and is serviced as a complete mirror assembly
• The body control module--Class 2 module that requires programming when replaced, serves as the power mode master and is the main message handler
• The DDM 10A fuse--Located in the I/P fuse block and is hot at all times
• The PDM 10A fuse--Located in the I/P fuse block and is hot at all times
• The memory switch, if equipped with memory mirrors--Supplied power by the DDM and provides a voltage signal to the DDM upon a switch activation
• The horizontal and vertical position sensors, if equipped with memory mirrors--Supplied a 5-volt and low reference by the DDM/PDM and provide a variable voltage signal to the DDM/PDM that is proportional to mirror position
• The park neutral position switch, if equipped with memory mirrors--Provides transmission gear selection information to the PCM and is used for memory recall and mirror tilt in reverse functions
• The powertrain control module, if equipped with memory mirrors--Class 2 module that requires programming when replaced and provides Class 2 message indicating transmission gear selection
• The driver information center (DIC), if equipped with memory mirrors--Part of the instrument cluster which is a Class 2 module that requires programming when replaced and is used to personalize the memory recall and mirror tilt in reverse functions
• Fold motor in each of the outside mirrors, if equipped with power fold mirrors--Provides extend and retract movements of the mirror and is serviced as a complete mirror assembly
Each of the outside power mirrors contains 2 reversible motors to provide horizontal and vertical movement of the mirror glass. The vertical motor operates the up and down directions and the horizontal motor operates the left and right directions. If equipped with power folding mirrors, each outside power mirror will contain a reversible fold motor to operate the extend and retract functions. Each of the mirror motors are circuit breaker protected.
The driver door module (DDM) and passenger door module (PDM) switch the mirror fold motor control circuits to battery voltage and ground in response to mirror extend or retract command.