Ugh...too many numbers...I realized later that this xdf isn't for 12579405 but that you simply stated you are working on one.

I was trying out this xdf with my factory bin last night and I feel one of the addresses may be off. I am using tuner pro and V5.8.1 and show G1202 - Vats is set to 4 from the factory when it should...

So investigating my donor PCM I discovered I have one without a corresponding xdf (12579405)needed to tune with Tuner pro. Has anyone had any luck in using 12587603 with a 2003 l59 and flex fuel...

I've had one stashed since I started down this road because it had a serial port and when i started that was a requirement to get them connected to the PCM reliably. Just booted it up and realized...

Hello from Houston Texas!
Complete novice to tuning and doing my first LS swap on a budget. L59 from a 2003 Suburban into a 1981 2wd K5 Blazer. Got a VXNano, an ebay bench harness and a PCM from a...