I have a 98 GMC Safari, 178K, 6 cyl., the a/c gets cold but only blows out the top & bottom with regular force but very little if any from the front dash vents. Is there a simple solution or does this require extensive repair? I need to know where to obtain graphics (free preferably) to locate the actuators or vaccum hoses also. Thanks for your help! :lol: :lol: :lol: