jdsdls,
Sorry to hear of your accident, my 1999 K1500 Suburban is doing the same thing (rust belt vehicle) and I had a near miss. At this point in it's life the truck is just a utility vehicle, no sport left in it and a winter beater so I don't risk the stopping issue often.
Is your's too old - like mine to be covered? I see the TSB covers 1999 Silverados but not Suburbans. I cant imagine the front brake system is that different.
Thanks for your post, I'll be calling the local Chevy dealer tomorrow and see what's up. NHTSA.gov did not have much info except an old (2002) TSB. On Google I found a document (#05068C) from GM dated 2008 that addresses the necessary repairs and covered vehicles.
Greg.