Looking at 08 Avalanche

I really want an Avalanche, I've liked them from the
beginning even with the "ugly" body cladding.  I
was wondering if anyone has had bad experience
with finding parts since they dont make them
anymore or bad experience in general.  The few
people I've talked to in person haven't had any but
were aware of issues with some of the first couple
years had.  

Or if there is anything truth that the avalanche is
making a comeback in late 2018.