I`m not sure about the solus, the college over here had a Snap On scan tool and it would not show the timing parameters on My 2000 K3500.
A shop that I`m friends with the owner has a OTC Genesis reader, it works very well.
There are some other readers that works but I do not know which ones they are.
if I go for a system to hook to the 6.5 I`m going with the one from Leroy Diesel. requires a laptop computer but there is no charge for the updates. Like OTC costs every time they come out with enhancements for each reader system.