Truck gets a flat, no big deal. Ive owned GM trucks since the 80's, had this Yukon for 76K miles so far, great truck/bulletproof.
So I'm airing up the tire and I notice the blinker is on. I stop adding air and the blinker shuts off. Wow never knew it did that! Then it gets to 35 psi the horn blows once. Get the pressure to 40 and it blows three times. I guess they thought it would be a safety thing if an approaching motorist sees the blinker then they might see you working on that side of the car too!
GM can be pretty clever when they want to be!
![OK](https://pics3.city-data.com/forum/images/smilies/oglvvd.gif)