GM Service Manual Online
For 1990-2009 cars only

Instrument Cluster

The instrument cluster is centered above the steering column in the instrument panel and is removable and is removable from the rear of the panel (toward the steering wheel). The cluster contains instruments that provide the driver with information on vehicle performance.

The instrument cluster includes the following components:

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A speedometer (with integral odometer and trip odometer)

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A tachometer

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A fuel gauge

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A volt gauge

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A coolant temperature gauge

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A oil pressure gauge

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An array of indicator lamps

The vehicle speed reading on the speedometer is shown in both English (mph) and metric (km/h) while the coolant temperature gauge omits any numerical readout markings and only contains a range of hash marks between C and H. The instrument cluster also contains numerous indicator lamps.

The instrument cluster assembly contains the cluster lens, the speedometer/tachometer gauge module and the voltage/oil pressure gauge module. The electric power is directed to each gauge via separate dedicated wiring harness connectors and to the appropriate lamps and gauges within each module through flexible printed circuits to each gauge module. While the instrument cluster is serviceable as both a unit and as individual components (each gauge module may be removed from the cluster lens for module or lens replacement) the individual gauge modules are not to be disassembled.

When an instrument cluster is replaced the law requires either the odometer reading of the replacement unit be set to register the original mileage or that a label be installed on the driver's door frame to show the previous odometer reading and the date of replacement. Since the mileage can NOT be set on the odometer in this vehicle an odometer label must be used.