RE: need specific guidance on my no heat problem
 

if its all vents,I'd look elsewhere...make saure both hoses are hot...make sure its not low of coolant

RE: need specific guidance on my no heat problem
 

I check that last week. both hoses are hot and the coolant reservior is correct.

RE: need specific guidance on my no heat problem
 

ok...I'd say it may be dealer time...it needs to be checked for codes...and pretty much only a gm tech2 scanner will "talk" to the hvac module.

RE: need specific guidance on my no heat problem
 

had the same problem found out that my heater core had fallen out of the clip that holds it in and the air was actually blowing over the top of the heater coil