Hello! New here and need some help!
 

hi there, Danny form Newfoundland

just bought a 2001 SLS and having an issue with what looks like either an air lock issue or possibly head gasket...was wondering if someone here can point me in the direction of some info...anyone had or heard of this same issue...please let me know where to find some answers...thanks a bunch! Looking forward to meeting some more Caddy lovers!

welcome, head gasket will normal have a loss of coolant and overheating. Air locks would be very unusual. CO test on cooling system would confirm exhaust gases in coolant and blown head gasket.