[f5fstop]

First of all, as far as I know, they are across the board in all GM vehicles, and have been for a few years.
As for the burned out bulbs. The bulbs they were using ran too hot, and burned. They have replacement bulbs that run cooler, and if they went to a dealer while under warranty, they would be replaced.
Saturn had this problem with the ION, and when in TN, I was involved in the research and testing of bulbs. Notice, no more problems with the newer IONs or older ones if they had the bulb replaced with the new bulbs.
I guess when GM went across the board with DRLs and incorporated many in the turn signals, no one thought there was that much variance between bulbs and heat output. Well, we researched it and wow, there is considerable different in heat output in bulbs.

As for the constant stream of bad decisions, that might have been a big problem, but don't blame DRLs on bad decisions. Light on the front of a car during daylight does help to prevent accidents and allows a person to see another vehicle sooner. Run with them off, or run with them on, I and many others could care less. From some studies I have seen done by insurance companies, a big factor is also the color of the vehicle. So, stay away from gray, it is a dangerous color, or so they say.