1988-1994 Chevrolet GMC Analog Gauges Silver Alloy
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1988, 1989, 1990, 1991, 1992, 1993, 1994
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Fit In Five Steps
How to replace a GMC Speedometer?
1. Remove The Negative Battery Cable
Park the truck on a level surface and set the parking brake. Place your key in the ignition and turn it to the “On” position, but do not crank over the engine. Tilt the steering column down and place your foot on the brake pedal. Shift the automatic gear lever to its lowest position. The first step is to locate the negative battery terminal. The negative battery cable should be removed so there is no chance of electrical damage when working with the speedometer. Loosen the battery cable bolt and remove the negative battery cable. Set the cable aside so it can not touch the battery.
2. Remove The Instrument Cluster
Locate the screws holding the instrument cluster in place. Some of these screws may be hidden behind other panels that will need to be removed. This varies by make and model. Once the screws are located, begin to remove them. Once all the screws are removed, make sure the instrument cluster is loose. Pull the cluster out just enough for the cluster’s wiring to be visible. There may be multiple plugs. Unhook all the connectors to the instrument cluster so it is completely free. Remove the instrument cluster entirely from the vehicle and set it on a safe work area on a towel.
3.Access The Speedometer And Remove The Speedometer From The Instrument Cluster
To be able to access the speedometer, the cluster’s plastic cover must be removed. Using a small screwdriver, pry up very lightly on the cover’s tabs to release them. Continue this all the way around the cluster until the plastic cover is able to be removed. With the plastic cover removed it should be a simple matter to locate the bolts that hold the speedometer in place. Remove the bolts securing the speedometer to the instrument cluster. The speedometer should now lift free easily.
4.Installing The New Speedometer
Place the new speedometer in the space vacated by the old speedometer. Tighten the bolts that hold the speedometer into place. Make sure the speedometer is secured to the cluster. Reinstall the plastic cover removed previously onto the instrument cluster. Carefully lock the clips into place without breaking them. Make sure the cover is secure.
5.Reinstall Removal Parts And Check Speedometer
First, reconnect any connectors or plugs that were previously disconnected to remove the cluster. Then, place the instrument cluster back into the dashboard. Install all the screws that hold the cluster in place. Install any other panels removed to gain access to the cluster. Go back under the hood and reconnect the negative battery cable. Tighten the cable to the terminal. Drive the vehicle at a low speed in a safe location and check that the speedometer is reading the correct speed. Confirm that the speed changes as the vehicle drives slower and faster.