I have 2007 Chevy Silverado. Yesterday when I was in work someone told me my Horn was blowing in my truck (It was off and I do not have an alarm system) Tried pressing at the steering whell to see if switch inside column was stuck but no luck. Minutes later as I started driving it, it quit blowing and now won't work at all

SOURCE: Chevy Uplander 2007 Steering column noise

you need to take this vehicle to a gm dealer right away sounds like a rod thats loose in there ?please rate my response thank you very much

SOURCE: Steering Column Slip

sounds like the vehicle needs to be serviced by a dealer. is it under 36000 miles? factory warranty runs 3 years or 36K whichever comes first. check with your local dealer or the NHTSA for related recalls or TSBs

SOURCE: Wobbly steering column on 1989 Chevy Silverado 2WD

It is rather complex but it can be done at home. It will also require special tools. The haynes manuals do cover this repair I believe.

SOURCE: Clunking noise in steering column

CHECK INTERMEDATE SHAFT

SOURCE: 2000 Chevy Silverado 1500 The heater does not

Had the same thing happen to my truck, the blen door actuator is under the console on passenger side, but the heater core is going to be clogged if you dont have any heat coming through, but a/c works..