Bad heater core in 98 Suburban?

[cigars]

passenger footwell gets a leak under dash. heater blower motor went a few years ago.

getting smell of coolant outside when hot, no visible signs of leaking coolant. coolant overflow tank needs to be filled to hot level often. any ideas?

[99-2door]

Is it leaking coolant inside or just water?

If it is just water, clean the drain vent on the outside right below the AC dryer. If that is plugged condensation will drip inside onto the floor.

 

If it is coolant, you have a heater core problem.

Also, check all your hoses, intake fitting, water pump, radiator cap, and radiator tanks. Something the burbs and Tahoes have that trucks don't is a valve that turns off the water to the heater core. Prone to leaking inside that valve. It is located just off the firewall, where the hoses go into the heater core. Also if you have rear heat, check your lines that run to the back of the body.

[cigars]

thanks, will check those pts out