I've received booklets of the new Silverado & Sierra, and they all say that the brakes are 4 wheel ABS but have front disc/rear drum. Only the Denali and HD models have front/back disc brakes. 2 questions, isn't the drum type brakes old technology and how do you have ABS with that setup? We just hot a 2007 Tahoe LT1, and I love it. But that's for my wife, and I need a pick up truck. I've been a Ford man for a long time but the Tahoe got me hooked. I do prefer the GMC Sierra to the Silverado, because the body work looks a lot better. Thanks in advance!