Not true, just got a set or rear fillers from the dealer. The price is nuts though, but then again I'm nuts too I don't like the fitment of any of the aftermarket stuff, the originals are the best IMO.
Well you need to go back to that dealer and buy all the rears you can find because they are long discontinued from GM! You'll get a mint for them on eBay. You got lucky that's for sure. I found a few rear sets around the country on my GM locator. I think the cheapest was 200 something each. Mine are fine but I was thinking on getting a set just to have. I have about 6 sets of the fronts stashed away. But yea.. NOTHING fits like OEM. I was talking to a guy last weekend who said he tried every aftermarket set out there and the next one was worse then the first he got!