Have you tried universal patcher? It doesn't use an xdf, it's a little different to look at from tuner pro, but it supports most ( if not all) p01 & p59 operating systems.
Edit love g body olds and Buicks
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Didn't see this one on here.
hi im looking for any 05 2500hd lly files or tunes out there that i can refer to thanks
Here's a 6.0 with 4L80E
Express 2500 van
7603 OS
VIN 1GCGG25U441181668
12587603 OS already setup for an DBC/IAC 4.3L V6. Dumped and unchanged from an junkyard ECU
2004 Silverado LR4 4.8_4L60E OS 12585950
Attachment 19937