I have a 2004 siverado...my A/C doesnt blow thru the vents...but when i drive i feel cold air blowing thru but once stopped...nothing. seems like the fan is busted....anyone else have this problem? how can i fix it myself?

could be a number of things . such as switch stuck air flapper or fan motor.

One of two things has happened. Either your coolant has gotten really low (easy enough to check) or you heater core is starting to plug up.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

If it has a cabin air filter the filter could be blocked.
It could also have a stuck or faulty blend door that directs air flow thru the HVAC box.

It sounds as if one or more of the door actuators is not moving the blend doors. Unfortunately, it will require some disassembly of the dash.

My 05 Pacifica is having similar issues. Did you solve your problem?

change your cabin air filter, it is probably clogged not allowing air flow. see your owner's manual for instructions. I hope this helps

You need to check the heater core it has two hoses going to it feel of them if one is hot and the other cold heater core is stopped up replace it or flush it out if they are both hot it can be the switch or a vacuum line the vacuum line will be on the passenger side under the hood where the airconditioner hoses go in the body

Would have him check out side air temp sensor ,thermister and rerove control head and inspect for burned terminal.1st.

Hope I was avle to help, glad you up and going.

do you mean the fan doesnt blow either or its just not blowing cold air? check your fuses under dash and under the hood
i can try to help you further with more info