Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2002 Chevrolet Astro Van Cargo, RWDFACTORY OEM SERVICE PROCEDURE
Compass Magnetic Variation Adjustment
WARNING: This page is about a different car, the 2001 GMC Safari and 2001 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Magnetic variation adjustments are required when compass displays a constant error in heading. Variation is difference between magnetic north and true north due to geographical location.
- Locate your geographic location. See Fig 1 .
- Turn ignition switch to RUN position, with engine off. Press MODE button in order to advance to COMP/TEMP mode.
- With DIC in COMP/TEMP mode, simultaneously depress and hold MODE and US/MET buttons until VAR CAL is displayed, in approximately 5 seconds. Release both buttons.
- Press US/MET button in order to advance to proper zone number.
- Press MODE button in order to enter and set zone number.
Factory Service Tools
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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.