1999 GMC Yukon LX review from North America

Since June 28, 2006 (232,000 miles) I could hear, coming from the steering column area, a sound identical to my turn signal being on. When I do engage the turn signal either right or left, I only hear the usual turn signal sound, but when I disengage the turn signal the sound is still there (the sound of the blinking). It is constantly on. The only time it goes away is when I depress the brakes. When I engage the hazard warning flashers the turn-signal sound problem goes away and all I hear is the hazard warning flashers so that seems to be working correctly. There are no warning lights lit up on the console. Any ideas?

When I bought the car two years ago the previous owner explained that the electric door locks do not work on any doors except the driver's door and that has been the case ever since, except that about one in ten times ALL doors actually do unlock with I use my remote key entry. All doors do LOCK as they should when I use my remote key entry so it's only the unlocking "wiring" that almost never works. The original owner told me that ever since she had the front windshield replaced the unlocking mechanism has not worked properly. Is this somehow related to the "turn signal" problem I'm now having? Is the electrical system giving out?

Electric seats, warmers, radio and all other electrical devices work just fine.