Search found 11 matches
- Thu Jan 26, 2023 8:10 am
- Forum: GM LS1 512Kbyte and 1Mbyte and newer
- Topic: Using XDF from older OS (7603 on 6960)
- Replies: 12
- Views: 3347
Using XDF from older OS (7603 on 6960)
I have a 2004 Flex Tahoe that came with 7603. I installed e-fans and modified the PCM using the XDF found here for that OS and flashed via PCM Hammer. All good. Awesome, in fact. However, a while back I swapped fuel pumps and it never registers full after a refill. There's a fuel calibration availab...