I bought lines for my '02 (NBS) when I did my NNBS GMT900 front upgrade. Goodridge 14175; they were about $130 for the complete front and rear set. Fronts are a lot cheaper if you just want to do those. Russell are a bit less expensive, about $110 for the complete set. I think just fronts are $45 or so. The rears consist of either 3 or 4 lines depending on if you have active assist. (There's a line in the center on all the rear on top of the diff that's a ***** to get to; I didn't get around to changing this on mine since I couldn't get to it, and I'm not sure where the active assist one goes, probably in the same area but my truck doesn't have that.)They pricey? I'm always on a budget. Would you get the nbs or nnbs lines? Since I have an 03 and the brakes are 07.