I did buy the GM service manuals... and not used and beat to a pulp for $800 from the Manual Mafia on evilbay.
Buyer beware. The Carnies are looking for Marks.
Helm Inc shipped
BRAND NEW Service and Wiring Manuals USPS to my door in 3 days for a $528.00 total price tag... USPS and all. Still shockingly high but it is NINE volumes... yep I really said nine.
Not terribly pleased with them packing Nine volumes in ONE
single wall cardboard box.
I was VERY DISAPPOINTED and bordering on angry with the packaging. The box opened up in shipping and I didn't accept delivery til I verified the contents were intact. Entire volumes could've been damaged quite badly or some could've been lost.
All nine volumes did arrive with the covers still attached and I was able to straighten the bent pages on the volumes at the ends of the stack with a heated flat iron. Only the back cover of the wiring volume was creased. Lady luck was smiling on me...
My other gripe is that the wiring manual was glued with the page numbers against the binding and the volume names are not printed on the spines. Not sure what's happening at Helm but it appears they are not all that they once were.
The contents are without equal even with the shipping and binding issues. Even Motor professional service manuals don't compare to real OEM service manuals.
The GMPT05/TURM is out of stock right now and $275 is a bit much for the two volume Transmission Unit Repair Manuals I've seen for $100-$130.
I do have both volumes of the 2001, 2004, & 2006 Unit Repair Manuals. I'm gonna hazard a guess that they'll do for now.