You aren't going mad, when we had the 55504430 OS sent in for support there was no trace of it on TIS (and still isn't).
The release order went.
55503875 - On TIS older
55504430 - Ghost
55508105 - On TIS current
The only thing I can think of is some vehicles came with 55504430 new but got updated at the dealer before delivery (or that was the intention).
Either way TIS doesn't know about it that is for sure.
Part Number |
CVN |
Description |
55508105 |
00003A0D |
New software with diagnostic enhancements for DTCs P11B3, P11CC, P1476, and P22FE. |
55503875 |
0000C880 |
New software with improved EGT tampering strategy. |
55488069 |
0000CA69 |
New software for start of production << Earliest we've seen in a truck |
55500006 |
00004875 |
New software for start of production |
55488063 |
0000F08F |
New software for start of production |
55488052 |
0000837F |
Main Operating System |