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GM Cluster repair
Posted to Technical Tips Forum on 9/29/2010 29 Replies

Iam sure we all have seen these GM clusters where the speedometer or one of the other guages sticks,jams,or doesnt work.Iam going to show the procedure how to replace these old stepper motors with a new one.

First let me show you the customer complaint. [2004 Pontiac Montana, Video] Now that we have verified the complaint, you must remove the cluster and take off the black platic covers from the back and front of the cluster. Once you have the gauge needles accessible... perform this task [2004 Pontiac Montana, Video] Then you need to seperate the front cluster board from the main circuit board as shown here [2004 Pontiac Montana, Video]. Once the circuit board is seperated then we can see the old binding stepper motor [2004 Pontiac Montana, Video].Here is a video of the new motor and part # [2004 Pontiac Montana, Video] .

Here is video showing the 4 small contacts that need to be de-soldered as so we can remove the old stepper motor [2004 Pontiac Montana, Video] This is the soldering iron I like to use when doing soldering. [Soldering Iron] Once the de-soldering is done we can see the old stepper motor removed from the board [2004 Pontiac Montana, Video] Then next we need to install the new motor and slightly bend over the tabs to lock the motor in place for soldering [2004 Pontiac Montana, Video] Now here is the new motor installed after being soldered in place [2004 Pontiac Montana, Video] Here is a video of the completed soldering.[2004 Pontiac Montana, Video] Now we must re-install the gauge needles [2004 Pontiac Montana, Video] and finish assembling the rest of the plastic covers.

Now its time to Test the repair [2004 Pontiac Montana, Video]

If you need to calibrate the needles for positioning you can use the scan tool to compare the vehicle speed to what the cluster indicates. (Same applies to the other gauges). Or one could even use a GPS which shows current speed for comparison.

Kevin from Manitoba

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car Vehicle Data

2004 Pontiac Montana 3.4L

Engine3.4 L
Trans4-speed Automatic (Electronic)