HUmmmmm Sept 13, 2005 22:49:27 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by warthog on Sept 13, 2005 22:49:27 GMT -5 have a 96 SR. recently rebuilt cat to pass calif. smog.All OK...but now have hummm in passenger compartment. Cannot hear it outside of vehicle. Truck is running great. Does anyone have any theories???
