GM 94857257
Speedometer Head

It is essential to perform odometer reading matching between the original and replacement units during speedometer or odometer assembly changes because legal requirements apply. A replacement unit must display a set odometer value of zero when matched mileage setting is unachievable while a label should also be mounted on the driver's door frame showing the former reading alongside the replacement date. Initiate the process by taking out the instrument cluster retainer. It is essential to keep the needle in the speedometer because there exists no flat spot or detent on its shaft to confirm proper alignment. Pull out the speedometer by removing 5 screws which keep the speedometer tightly attached to the instrument cluster case. To install the speedometer replace it into the instrument cluster case by using the 5 screws to secure it before mounting the instrument cluster retainer.

Setting the replacement odometer for the speedometer assembly to the original odometer's distance is essential; however if odometer setting at the previous reading is not practical then the new odometer must start at zero and a label must describe the original reading and the time of replacement on the driver's side door. Start by removing the instrument cluster retainer then secure the speedometer needle because the speedometer shaft lacks a correct placement detent or flat spot. Start by disconnecting the speedometer from its instrument cluster case using the five attached screws before extracting the speedometer from inside the case. After placing the speedometer inside the instrument cluster case use the 5 screws for closure followed by instrument cluster retainer reinstallation.