So replaced the thermostat not too long ago and topped off the radiator and bled the system and no leaks are visible but I have to continuously add coolant every few days. Where could the coolant be going? No smoke out of the exhaust I have a 1996 with the 5.2L. I'm thinking it's the manifold gasket much like many GM vehicles but any help or ideas as to where to look will be helpful.

 

Do a pressure check on it; look especially at the bypass hose (intake to water pump) and the water pump weep hole specifically.

Also check and see if while it's under pressure for a while if any water starts dribbling out the A/C drain.

!MY! truck - the Spectra Premium radiators keep leaking at the driver's side inside where the tank joins the core.

RwP