I have been building/tuning a heavily modified custom dune vehicle for a few years. I really think that the Boost OS v4 patch will solve my issues tuning. It started life as a 2001 Tahoe DBC 4l60 we have broken and updated just about everything you could think of. 2 Engines, 4 different trans, gears, rear end on and on...
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The hurdle is the PCM needs to be upgraded to a p59 7603 OS for the most current release of B.OS.4. I have repined and swapped to a p59 blue green ecu from a 2006 Express van (With IAC)
I changed to a compatible 7603 OS.
I have the 2004-4.8L-LR4-DBC-4L80E-Express-Van-12587603-OS-STOCK.bin and it will start and idle the cam really messes with air ratios at low rpm.
I can't figure out how the heck I start when my combo doesn't exist from the factory.
I know can't just copy my tune because the OS is different and my 411 VE table is not great to begin with.
I know the segment swap procedure, but there is no DBC 5.3 Calibration for a 7603;
Questions
1. Can I use a 5.3 DBW Cal from a 2004 Bin and just change the ETC in the system options, Using the mother of all 7603 xdf file.
2. When I have a running Bin
a. I then apply the boost os exe, correct?
b. after I update bin, do I use the xfd from the boost os from that point forward for tuning anything?
5.3 LM7 DBC
Sloppy Stage 2 Cam
Fulltime wideband o2 gauge.
Pack Springs
Decapped Injectors
Single 72mm Wo-Han Whistle (Turbo) 10-15 psi
3 Bar Map
Intercooled
Duramax 4 row aluminum racing radiator. 2x15" Brushless Push Thru Fans + 2x10" intercooler pull thru fans.
Built 4l80E Transmission with Shift kit mods
Transmission Override Controller for Full Manual Paddle Shifting or Full Auto from ECU. (Custom Arduino Based solution)
411 Gears (W Grizzly Locker)
Manual NP 201/241 hybrid 4x4 Transfer case with 2.73 4-low.
Attachment 19243
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