Can anyone tell me what these connectors are for and where they are controlled from on a 2003 Hummer H2

 

The first looks to be the connector for the side LED marker lights I believe. Are your side markers on and working/flashing like they should? The second picture are not connectors. They are impact sensors or air temp sensors-can't remember which one.

 

I agree with LoJac, the first could also be for the fog lights in the lower bumper, can't remember off hand if they come from off the headlight harness or from a separate one.

Should check side marker lamps and fog lights to see if they are working.

Ross