TRIP ODOMETER RESET OPERATION DIGITAL INSTRUMENT CLUSTERS

VEHICLES AFFECTED: 1985-90 DEVILLES AND FLEETWOODS WITH DIGITAL INSTRUMENT CLUSTERS

DeVilles and Fleetwoods equipped with Digital Instrument Clusters may exhibit a condition where the trip odometer in English mode rolls over (resets to zero) at 621 miles (999.9 kilometres) or in Metric mode resets to zero at 1609 kilometres (999.9 miles). The speedometer and season odometer are unaffected.

This is a normal condition on all 1985-90 DeVilles and Fleetwood and cannot be corrected by repair or replacement of the Digital Instrument Cluster.

This condition may be caused if the customer uses the trip odometer reset button or if the trip odometer rolls over while in Metric display mode. If the cluster was rolling over at 999.9 miles (1609 kilometres), pressing reset in Metric will cause the cluster to reset to zero and roll over next at 999.9 kilometres (621 miles). If the cluster was rolling over at 999.9 kilometres, pressing reset in English will cause the cluster to roll over at 1609 kilometres (999.9 miles).

To correct roll over conditions:

1985-9989 DeVilles and Fleetwoods (roll over at 621 miles, English).

1. Set the cluster in English model.

2. Disconnect the battery memory power to the cluster by pulling the cluster fuses in the fuse block (or by disconnecting the vehicle battery). This will cause the trip odometer to reset to zero and roll over at 999 miles.

3. Advise the customer not to press reset in Metric and not to allow the cluster to roll over in Metric mode. If neither occurs, the cluster may roll over at 621 miles when returned to English mode, and fuses will again have to be pulled.

1990 DeVilles and Fleetwoods roll over at 621 miles or 1609 kilometres.

Press reset in English to cause cluster roll over to occur always at 999 miles (which will be displayed as a roll over at 1609 kilometres in Metric). Press reset in Metric to cause cluster roll over at 999 kilometres (which will be displayed as a roll over at 621 miles in English).

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.