Software 55595656 55576791 55499969 55489650 5550 Delco E98
6 master projects carry this software number, 6 with a modified version. Upload your read to have the tune transferred into your own file, or buy the file exactly as we hold it by software number. Modified files from $275, original (stock) files from $75 AUD. Trade accounts see their own pricing after log in.
Fitted to
Holden colorado ×3
Holden ×2
Holden Colorado
ECU
Delco / Siemens/Continental
E98 / E39
GM
Hardware / part numbers
—
Read with
any full read from your flashing tool
Modifications available
- Stage 1 ×1
- EGR off ×6
- DPF off ×4
- Swirl flaps off ×1
- Other modification ×1
Have the read? Upload it.
Upload your read →
Your own file comes back with the modification built in, checked for a 100% match before it's offered.
Can't read the ECU? Buy by software number.
See files & prices →
The stock or modified file exactly as we hold it, to write with your tool. Make sure your ECU carries
55595656 55576791 55499969 55489650 5550 and the same hardware number.Vehicle pages: Holden Colorado · Holden colorado
Files are supplied for off-road / motorsport use; checksums are corrected by your flashing tool on write. Last project update 2026-08-28.