AC is fully charged but blows cold for a while then not as cold

What is your question?

I've had my AC recharged and replaced the low pressure switch. It blows super cold. Then not so cold. And at idle barely cold at all.

What makes this problem better or worse?

Moving helps some. Sometimes cutting the blower motor down

How long has your 2007 Hummer H2 had this problem?

4 weeks