Sorry if the cross posting offends anyone - but I wanted the same info to go out to both groups. I've seen this general topic discussed in both groups in the past.
I have an 02 Chevy Suburban half ton 4wd. It's had to go back to the dealer twice for parking brake adjustment - the PB would go to the floor and not hold. Both times it was adjusted w/o charge. They had to adjust the brakes themselves, not the cable. Neither time did they give me any advice. I have an acquaintance who is a GM mechanic at a different dealer and I asked him if these brakes are a problem he sees a lot. He gave me advice that my dealer should have given to me the first time I brought it in.
He told me that they are self adjusting in that they adjust to wear in the brake pads - but only if you use them regularly. This may be a *DOH* to some people, but it wasn't for me and I was a little frustrated that my dealer's mechanic hadn't advised me as such. In fact, last winter, the PB were binding and the dealer actually told me not to use them in the winter because they would tend to freeze up and bind.
My acquaintance told me that all you have to do is to set the brakes every week or so, but if you don't use them regularly, the pads will wear, the self adjustment won't work and the brakes won't hold when you need them. I'll get back in the habit of just using them routinely for parking and, as for use in the winter, I'll just set them in the garage at night. He also told me that the PB pedal "normally" goes down to the floor to set it a feature that I dislike, but will live with.
FYI, HTH, etc.
DJ