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HOMESERVICE MANUALSGMC1999FORWARD CONTROL 5.7 R, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 513 (INSTRUMENT PANEL, GAGES, AND CONSOLE)REPAIR INSTRUCTIONSELECTRONIC COMPASS CALIBRATIONCOMPASS CALIBRATION
1999 GMC Forward Control 5.7 R, Automatic

Compass Calibration

1999 GMC Forward Control 5.7 R, AutomaticSECTION Compass Calibration
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Important:  Before calibrating the compass, drive the vehicle to a area that is magnetically clean, and free of large metallic objects.

  1. Turn ON the ignition.
  2. Press the MODE button in order to advance to the COMP/TEMP mode.
  3. Simultaneously depress and hold the US/MET and MODE buttons until a C is displayed, in approximately 10 seconds.
  4. Release both buttons.
  5. Drive the vehicle in circles at a speed of less than 8 km/h (5 mph) until the C is replaced by a proper vehicle heading. The calibration procedure is now complete.
    Fig 1: Calibrating Electronic Compass
    G01476613Courtesy of GENERAL MOTORS CORP.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.