I have had an ongoing nightmare with my top for the last several months. Mine was originally missing the plastic slider tabs and had worn through the bottom layer of the canvas, so my dealership offered to replace the top. After waiting months for all the parts to come in, they replaced the canvas only (not the frame) and both side weatherstrips (#8 in the diagram). Not only was the top replacement botched with everything way out of alignment, they failed to install the plastic tabs that caused the problem in the first place. They ordered the weatherstrip parts again expecting the tabs to be included.
They recieved the weatherstrips packaged in a plastic bag with NO tabs. After contacting GM tech support they ordered again and got the right side in a cardboard box WITH the tab but could not get the left side in a box.
Apparently one version is made in Canada and the other in Mexico, I can't remember which is which. One is in a box with tab, the other in a plastic bag without. The real kicker is my dealership was told the plastic bag version was newer, and the box version was discontinued which is why they couldn't get the left side. As far as I know, the part numbers are the same on both.
In the end they were able to "acquire" a tab to use on the left side, so now I have both but my windows do not fit the new weatherstrip apparently. The front A pillar weatherstrip was also replaced to mate up with the new roof line strips but now the window can't be adjusted to eliminate air leaks. They've already adjusted the tip in to fix leaks at the top of the window but now there are even worse leaks at the rear edge which is not seating on the B pillar strips. GM tech support is recommeding they stuff something inside the strips to make them stiffer. Right now I'm waiting on those parts but I'm not holding my breath that it'll fix the problem.
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Sly GXP "Sally": 5 Speed, Darkside, Ebony w/Red Stitching, Premium Package, A/C, 6 CD w/Monsoon/XM, Acoustic Headliner, Sport Metallic Pedals.
Produced 1/3/07 Delivered 1/22/07!!!
"Sneakin' Sally through the alley!" -Robert Palmer