My 1994 GMC 1/2 ton truck started making a loud thumping noise under
the right side of the dash. It happens everytime I turn on or off the
key. The thumping will last about 20 seconds and then stop. It sounds
like the heating fan is hitting something in the heating cowl area.
Could there be a relay or vacuum device that is supposed to open or
close a door that isnt working properly? any ideas? thanks
Posted using the http://www.autoforumz.com interface, at author's request
Articles individually checked for conformance to usenet standards
My 94' chevy silverado does the same thing and has been for years. I think
it may be a relay, but not sure. The brief tapping sound hasn't seem to
affect anything else, so I havn't worried about it. I would like to know how
fix it as well.
I'm still in need of a grill for this truck. See my other post.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.