GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC K Pickup - 4WD 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Tachometer Inaccurate

Step

Action

Value(s)

Yes

No

1

Did you perform the Instrument Cluster System Check?

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Go to Step 2

Go to Instrument Cluster System Check

2
  1. Connect a scan tool to the Data link Connector (DLC).
  2. Start the engine.
  3. Read the engine RPM display and compare the display to the vehicle tachometer reading on the I/P Cluster.

Is the scan tool reading within 250 RPMs of the vehicle tachometer?

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Go to Instrument Cluster System Check

Go to Step 3

3

Replace the I/P Cluster. Refer to Instrument Cluster Replacement

Is the repair complete?

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Go to Instrument Cluster System Check

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