Author	[Modern View]
Larry O 12-08-2012 16:45:36 162.40.203.179 Report to Moderator	This has me stumped 1998 Silverado with little to no air coming from the vents Fan is working you can hear air moving somewhere but not to the vents. There is no change in volume when you go from hot to cold but you can feel the heat difference. I have had the bottom off most of the duck work looking for a blockage or a stuck door but so far nothing any Ideas would be greatly appreciated Thanks Larry O [Reply]   [No Email]
bradk 12-09-2012 07:02:59 209.131.231.118 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   No cabin filter on a "98. I"d bet you have blocked airflow at the AC evaporator.Very common especially in farm trucks where dust and debris get sucked down the outside air intake. Take out the blower motor and use an air gun with a bendable wand(copper tubing works good)and carefully blow out the inlet side of the evap core which is right ahead of the heater core without getting too rough.There should be a screen attatched to the core,you can take that out and leave it out as it seems to contribute to the problem. [Reply]  [No Email]
Allan In NE 12-09-2012 05:44:31 148.66.98.174 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   Cab Filter plugged? Allan [Reply]  [No Email]
MisterT 12-09-2012 06:04:32 216.248.71.226 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Allan In NE, 12-09-2012 05:44:31   Quoting Removed, click Modern View to see I have an '01 that I bought new. I never did think the heater/AC worked as good as it should. A few years ago I learned there might be a filter in there, so I went looking, found it, and yes it was dirty. I pulled it out, put the door back on without a filter, and now the system works just like I always thought it should have. Apparently those filters are quite restrictive even when new. Unless a truck is being operated in extreme dusty conditions all the time, I see no need for that filter. [Reply]  [No Email]
brian brooks 12-08-2012 23:54:18 173.17.71.242 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   Look it up online some rides have problems with the blend door. [Reply]  [No Email]
Tim in OR 12-08-2012 19:41:40 67.189.86.181 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   any chance a vacuum line has collapsed? [Reply]  [No Email]
Ronald Anthony Anderson 12-08-2012 18:33:50 184.94.143.94 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   The switch that controls vent,defrost, heat, air conditioning probably went bad for you. They are noted for doing that. Its hard to find one in a junk yard. 50-75.00 used [Reply]  [No Email]
GREG1959 12-08-2012 17:38:35 69.176.13.178 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   Mouse nest???? [Reply]  [No Email]
Lance in Brenham TX 12-08-2012 17:08:33 108.204.169.54 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   If you can hear the fan blowing, the door is stuck. [Reply]  [No Email]
Larry O 12-08-2012 17:16:24 162.40.203.179 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Lance in Brenham TX, 12-08-2012 17:08:33   Lance I’m with you but like I mentioned I have had the bottom of everything inside and all the doors I can find move and make no difference in air flow. I was hoping there was one somehow hidden that I’m not finding. Larry O [Reply]  [No Email]
ray hofstetter 12-08-2012 17:26:57 198.228.228.143 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 17:16:24   No air ANYWHERE? Maybe "squirrel cage" came loose/broke on the fan motor? [Reply]  [No Email]
dannye 12-08-2012 17:07:13 68.235.81.72 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 16:45:36   What year? My "02 has a filter on the bottom, by passengers feet,not too bad to replace,mite try that. Dan [Reply]  [No Email]
Larry O 12-08-2012 17:20:32 162.40.203.179 Report to Moderator	Re: O/T Chevy Silverado air system in reply to dannye, 12-08-2012 17:07:13   Dan mine is a 98 and my Haynes book doesn’t show scat about the duct work I have not seen a filter but will look and post back Thanks Larry O [Reply]  [No Email]
ShadetreeRet 12-08-2012 17:48:09 184.4.21.191 Report to Moderator	Re: O/T Chevy Silverado air system in reply to Larry O, 12-08-2012 17:20:32   Those Haynes manuals don't even make good toilet paper! But seriously, if you stop by the parts dept. of your nearest dealer, (providing you are on speaking terms), they may show you the breakdown on the computer, Especially if they think they may sell a part. [Reply]  [No Email]
casecollectorsc 12-08-2012 18:42:10 64.33.230.143 Report to Moderator	Re: O/T Chevy Silverado air system in reply to ShadetreeRet, 12-08-2012 17:48:09   Around here they tell you, could be this, could be that, bring it in we will look at it. Don't think so!! [Reply]  [No Email]
tedregentin 12-09-2012 06:24:22 216.110.201.79 Report to Moderator	Re: O/T Chevy Silverado air system in reply to casecollectorsc, 12-08-2012 18:42:10   Do you expect a shop to diagnose a problem over the phone? [Reply]  [No Email]