How many chassis grounding points do I look for

What is your question?

The avalanche has multiple places the harness is grounded or components grounded, how many and where are they located

What makes this problem better or worse?

Worse when I turn on radio, bright and or fog-lights, or any additional pwr draws

How long has your 2004 Chevrolet Avalanche 1500 had this problem?

A few weeks