Constant ambient air through the lower vents ('93 GMC 1500) - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


GMC/Chevrolet Truck/SUV When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made.

Reply
 
 
 
Thread Tools Search this Thread
Old 09-12-2011, 01:07 AM   #1
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Mar 2011
Location: Las Vegas NV
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
praiseteamof2 is on a distinguished road
Default Constant ambient air through the lower vents ('93 GMC 1500)

I have full time ambient air coming through the foot - bottom of my dash vents - and no heat or A/C or fan is turned on at all. A vacuum door issue or an electric resistor being located where ? Or perhaps a missing rubber dash grommet somewhere ?
praiseteamof2 is offline   Reply With Quote
Old 09-12-2011, 02:56 AM   #2
Senior Member
Certified GM nut
 
SignOfZeta's Avatar
 
Join Date: Mar 2005
Location: New Milford, CT
Posts: 2,284
Thanked 16 Times in 13 Posts
SignOfZeta has a spectacular aura aboutSignOfZeta has a spectacular aura about
Default

Quote:
Originally Posted by praiseteamof2 View Post
I have full time ambient air coming through the foot - bottom of my dash vents - and no heat or A/C or fan is turned on at all. A vacuum door issue or an electric resistor being located where ? Or perhaps a missing rubber dash grommet somewhere ?
I've moved your thread to the GMC mechanical/maintenance section.

You'll have to be more specific. Can you change the temperature of the air, the location of the air, or neither?
SignOfZeta is offline   Reply With Quote
Old 09-12-2011, 04:05 PM   #3
Senior Member

True Car Nut
 
sseidriver97's Avatar
 
Join Date: Mar 2010
Location: Portage mi
Posts: 7,124
Thanked 3 Times in 3 Posts
sseidriver97 is on a distinguished road
Default

Well sense the heater core is mounted right there in the lower box its no surprise that i feel the same on both of my 93'* i just turn it to cool if i dont have the heat and i forget its there
sseidriver97 is offline   Reply With Quote
Old 09-12-2011, 10:09 PM   #4
Member
Posts like a V-Tak
Thread Starter
 
Join Date: Mar 2011
Location: Las Vegas NV
Posts: 30
Thanks: 0
Thanked 0 Times in 0 Posts
praiseteamof2 is on a distinguished road
Default Air

Yes, I can change it to heat, floor windshield, or vent - move it anywhere. At present I have no A/C working on account of a freon leak. It seems like outside air coming in -steady too ..somehow.
praiseteamof2 is offline   Reply With Quote
Old 09-15-2011, 02:58 PM   #5
Senior Member

True Car Nut
 
sseidriver97's Avatar
 
Join Date: Mar 2010
Location: Portage mi
Posts: 7,124
Thanked 3 Times in 3 Posts
sseidriver97 is on a distinguished road
Default

Have you checked the grommet around your steering column at the firewall?
sseidriver97 is offline   Reply With Quote
Old 12-05-2011, 06:57 PM   #6
Senior Member
Posts like a 4 Banger
 
Join Date: Oct 2010
Posts: 115
Thanks: 0
Thanked 0 Times in 0 Posts
D Ryan is on a distinguished road
Default

Quote:
Originally Posted by praiseteamof2 View Post
Yes, I can change it to heat, floor windshield, or vent - move it anywhere. At present I have no A/C working on account of a freon leak. It seems like outside air coming in -steady too ..somehow.
I'M not sure of this but dosent the truck have a fresh air intake just in front of the windshild? I think this is shut ON and OFF by a door inside the system

Something I seen over at the Explorer fourm where thay had a problem with the door, and was letting cold air in all the time. Their fix was to remove the door and tape shut the air in take.

You could probley do a smoke test; turn the blower on full, see if it sucks smoke into the system.

Let us know how you came out.
D Ryan is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
1989 98 Weak air flow through vents frecny Oldsmobile 3 01-26-2012 01:25 PM
Air not blowing through the main front vents. 95neongirl General GM Chat 22 07-28-2011 11:44 AM
No Air through VENTS Tragz 1992-1999 7 06-01-2006 01:09 AM
Hot engine air blowing in through bottom vents Boreas 1992-1999 8 05-07-2006 04:36 AM
LOW AIR COMES THROUGH THE VENTS vze3r85p 1992-1999 3 10-15-2002 06:14 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:27 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.