I have an 03 Blazer 4d Ls, My overhead thermometer reads OC and my compass works fine already has a new Ambient air sensor ..... any ideas??

 

have you tried resetting it? in your owners manual there are instructions on how to reset that thermometer. i dont know it off the top of my head though.

 

The manual says something about re calibrating the compass, but I'm not seeing anything about the thermometer.

 

Welcome to the site. O C on the temp display means Open Circuit.....you have a wire cut in half or a loose (open) connection at one of the connectors. If your's has automatic HVAC controls there are two sensors both are behind the grille....possibly changed the wrong one?

 

thanks a ton looks like I know what I'm doin today