Having problems with your 1990 Chevrolet Astro Extended ?
Steam rising from heater vents and lossing coolant in a 1990 Chevy Astro Van,
Hi its your heater core that went bad
Repair Help & Product Troubleshooting for 1990 Chevrolet Astro Extended
Tips for a great answer:- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.