K 2500 Truck 4WD V8-379 6.2L DSL VIN C FI (1989)
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Important
Before proceeding, the technician should assure that hands are clean and free from dirt or grease.
1. Remove the four screws holding the lens and plastic retainer to the cluster. Then lift off the lens and plastic retainer assembly.
2. Remove the four screws holding the speedometer assembly to the cluster. Carefully lift the speedometer assembly away from the cluster.
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Important
Due to ESD precautions, do not touch the circuit board or other components of the instrument cluster.
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Odometer with trip odometer:
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Remove the two plastic light tunnels (at opposite ends of the odometer assembly).
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Remove the two screws holding the odometer assembly in place.
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Unplug the connector from the circuit board and lift out the odometer assembly.
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Odometer without trip odometer:
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Remove the three screws holding the odometer assembly in place.
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Unplug the connector from the circuit board and lift out the odometer assembly.
Setting Mileage On the New Odometer
1. If the assembly has a trip odometer, remove the screw from the metal odometer shaft retainer. It is located on top of the odometer assembly,
between the odometer and trip odometer sections. Then, lift the retainer off.
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Lift the odometer section up and out by both ends.
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Important
The drive gear is a snap fit and requires care when lifting the odometer. Also, if the vehicle you're repairing has both the odometer and trip
odometer, they have slits on the inside ends of the shafts which hold a coupler (either metal or plastic). Do not lose the coupler as you remove
the odometer.
3. Note the position and alignment of the projecting ears of the pinion carriers (on bottom or backside of odometer wheels). The numerals exactly
opposite these ears will appear in the odometer window. Use the tenths wheel numeral opposite these ears as a reference for setting the other
wheels. Hold the first figure wheel (tenths on the extreme right) between your right hand thumb and index finger.
4. Remove the plastic carrier retainer from the projecting ears on the backside of the wheels.
5. With the left hand index finger, rotate the first ear (between the ones and tenths wheel) completely around and back into its original position.
This will increment the "ones" wheel. The carrier must be rotated one full turn for each increase of the number.
Continue rotating this carrier until the wheel indicates the desired figure as it would appear in the odometer window. The pinion carrier must end up
in its original position (as if the plastic pinion carrier retainer were installed) for the correct number to be displayed.
6. Shift the right hand thumb and index finger to hold and keep in alignment the first figure wheel, the first pinion carrier and the second figure
wheel.
7. With the left hand index finger, rotate the second pinion carrier until the third figure wheel indicates the desired figure.
