A/C isnt cold

Hi guys my 03 tahoe isnt blowin cold air its weird how can i fix it?

Do you happen to know if the compressor is running or not? That's the first thing I always check, if it isn't, I check the fuse, if that's ok, I start charging ti to see if the compressor comes on. If it does with a tank connected to it, you have a leak and it's cutting out on low pressure cut out.

These trucks will eat the compressor if it gets only a little low on refrigerant. Best to make sure you have the full charge before trying to run the compressor.