97 GMC Front A/C

I replaced the vacum line that was cracked and now my vent switches from floor to window to vents etc... BUT I Have NO COLD AIR when in A/C , but rear A/C worksw fine and very cold. does anyone have any suggestions and also would like a/c diagrams and parts locations.
please e-mail me at [email protected]
:confused:

Sounds like your heater core valve (vacuum) is not closing all the way.