One problem related to horn assembly has been reported for the 2004 Chevrolet Tahoe. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Tahoe based on all problems reported for the 2004 Tahoe.
More so when it is below 40 f outside, the horn will not work. The keyless remote will work and sound the horn. I never know when it will work or fail. I have seen a NHTSA id # 10013378 (TSB #3300c) that seems very similar to what I am experiencing but I have not been able to find out details about it. I have searched online and have found numerous similar issues with other gm products from 2002 to 2005. I am concerned that when I need to use the horn, it will not work.