Where is the ignition module on a 1999 Chevy Astro van?

The 1999 Chevy Astro van's ignition module isn't a separate, easily identifiable component like in older vehicles. Instead, the ignition control function is integrated into the Powertrain Control Module (PCM), also known as the Engine Control Module (ECM).

You won't find a separate "ignition module" to replace. Any ignition-related issues are usually addressed by diagnosing and potentially replacing the PCM itself. The PCM is typically located under the hood, often near the firewall. However, its exact location might vary slightly depending on the engine and other options in your specific van. Consulting a repair manual specific to your 1999 Chevy Astro van's engine (4.3L V6 or 5.7L V8) will give you the most accurate location.