03 chevy coolant leak

[ducky]

Water pump most likely. Ive had 2-3 on previous vehicles where I could only smell the sweet syrup smell but never saw any puddles. It usually leaks from the weep hole at the back like stated above.

[jaysonolson]

on this trucks the water pump seals go out and the house coupler at the firewall cracks as well. my bet is the waterpump to engine seals have cracked