I guess the "avalanche" isn't in that thread I posted above.
Here's a pic of the "tahoe", notice the shorter wheelbase and lower rear door area, it's curved around the wheel well, just like todays tahoe vs suburban.
And here's a couple of the "avalanches". These aren't modified, this is how they were sold in argentina. Also notice the "avalance" isn't on the suburban body, it's on the "tahoe" body. Someone posted a brochure with them all once.