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, AWDFACTORY OEM SERVICE PROCEDURE
Programming Varification
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.
- With a scan tool, clear DTCs. Then Attempt to start engine.
- Repeat Service Programming procedure if engine does not start or operates poorly. Perform following procedures before programming PCM:
- Ensure PCM and DLC connections are OK.
- Ensure Techline(R) operating software is up to date.
- Ensure calibration part number is correct for vehicle.
- Attempt to program PCM. If powertrain control module still cannot be programmed properly, replace PCM. See POWERTRAIN CONTROL MODULE under REMOVAL & INSTALLATION.
Factory Service Tools
Use the Manual With the Right Hardware
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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.