Ac will not cool at idle but gets cold while driving 02 Tahoe?

If the AC in your 2002 Tahoe isn't cooling at idle but works while driving, it could be due to a few reasons. One possibility is that the engine isn't running fast enough at idle to engage the AC compressor effectively, leading to reduced airflow and cooling. Another potential issue could be a failing or clogged condenser, which may not dissipate heat properly at lower speeds. It's also worth checking the refrigerant levels, as low refrigerant can affect performance at idle.