Having problems with your 1998 Pontiac Sunfire ?
Leaking water into passenger side floor board
Your heater core is leaking more than likely. Check & see if your coolant is dropping & if so change the core. It could also be a weather strpping problem. Good luck!
Repair Help & Product Troubleshooting for 1998 Pontiac Sunfire
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.