The cluster stepper motor is a part that is used in the cluster of your 2003-2006 GM. The clusters of these models have a known error that causes the gauges to read erroneously. This can create confusion when reading the gauges and may indicate an inaccurate reading. Replacing the cluster repair motor will fix the known error for your cluster and provide accurate readings for your gauges.
Note: Professional Installation is Recommended. Please do your research before making the purchase.