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"C" & "K" Series

  1. Remove instrument cluster from vehicle. Plug connector from service kit into back of instrument cluster and momentarily touch the wires across the vehicle battery terminals.
    NOTE: The connector from service kit should be used a maximum of 10 times. It is not necessary to perform step 1) if speedometer has been previously recalibrated. Follow specific instructions provided with service kit.
  2. Check INSTRUMENT PANEL CALIBRATION SPECIFICATIONS  using vehicle axle ratio and corresponding tire size to find the appropriate pins to be removed from clip. The rectangular end of clip is at the top. The pins are numbered 1 through 8 from top to bottom. See Fig 1 .
  3. Remove pins by bending them back and forth with long needle nose pliers. Insert modified clip into 8 holes in rectangular slot on back of instrument cluster. Install instrument cluster in vehicle.
Fig 1: "C" & "K" Series Speedometer Calibration
G117161Courtesy of GENERAL MOTORS CORP.
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