update lb7 OS?

[SGFastMax]

is it possible to flash an 03 or 04 OS onto an 02 lb7 ecm?

[THEFERMANATOR]

Yes, but why? The 6006 02 is about as good as it gets and has pretty much the same detail in all the data fields as the 044 03-04 OS.

[SGFastMax]

i see i just compared files and no egr and rev limiter in the 01 file. otherwise their the same.

[THEFERMANATOR]

01 has a rev limiter in it as well, but is worked into different tables from the factory. Anything an 01 can do, an 02+ can do plus more. I switched back to an 01 in my BURB simply because I wanted the 850 fast idle, but the driveability of the 01 is nowhere near as nice as the 02 was.

[SGFastMax]

is the 02 7100 OS better than the 6006 OS?no egr in the 7100.

[THEFERMANATOR]

is the 02 7100 OS better than the 6006 OS?no egr in the 7100.
It is an early 02 OS that some have said even made it into 01's as well. It is pretty crude by design and has all the same basic detail as an 01. Even though they have a spot in the OS for an EGR, it doesn't meen that it is used or even activated. MOST LB7's don't have an EGR valve on them, so it isn't activated in it. I'm getting ready to go back to a 6006 OS as the 01 OS has a funky feel to the pedal off idle.

[SGFastMax]

i know exactly what you mean, i did some tuning on an 01 rescently and noticed the weird feel in the throttle. also the 01 had rough shifts when it was stock before i touched it and i noticed in table b0741 in the 7100 os isnt defueling like the tables in the newer os's are.

[JustinD]

I have an 01 with the 3376 OS, should I update it? What would I gain?

[THEFERMANATOR]

I have an 01 with the 3376 OS, should I update it? What would I gain?

The main improvements will be driveability, more detailed tuning tables, some added tables, and less wierd unexplaineable quirks. I went back to the 01 8873 for about 2 weeks before I got tired of random plumes of black smoke when moderately accelerating, and just all around poor driveability before I went back to the 6006 02 OS. The difference is night and day between the 2 for driveability. The only real drawback is you will lose the 850 fast idle option that only the 01 OS has in it. The 02+ will have a 680 idle VS the 600 of the 01, but I can send you the script to bring the idle back down to 600 like the 01's have.

[2001-GMC-LB7]

Where can I find these OS files???
I know what you mean about off idle and smoke plumes now and then and i also get a loppy idle off throttle now and then but it clears up in about 5 seconds.
Thanks.
Jeff

[GMPX]

The problem is the Duramax is quite fussy about getting the correct segments for each truck, this is why you can't really flash any tune from other truck and guarantee it will be happy.
If you want the latest for your truck the only 'correct' option is to use GM's on-line TIS, this will flash the latest OS for your truck with the correct segments. That will not update a 2001 to what the 2003 trucks were running BTW.

[SGFastMax]

http://www.holdencrazy.com/EFILive/




Where can I find these OS files???
I know what you mean about off idle and smoke plumes now and then and i also get a loppy idle off throttle now and then but it clears up in about 5 seconds.
Thanks.
Jeff

[THEFERMANATOR]

The problem is the Duramax is quite fussy about getting the correct segments for each truck, this is why you can't really flash any tune from other truck and guarantee it will be happy.
If you want the latest for your truck the only 'correct' option is to use GM's on-line TIS, this will flash the latest OS for your truck with the correct segments. That will not update a 2001 to what the 2003 trucks were running BTW.

The 01 OS I had was the latest and greatest that GM had for my VIN and was flashed in with a TECH 2 at a dealer, but I still had ALOT of ghosts in it that I could never get tuned out. I upgraded to a 6006 for an 02(got it from the DP) and all of these issues stopped immediately. I went through and made all of the tables in the 02 match the 01, and none of the issues have returned. 01 OS are just plain fussy in the DMAX, and don't really drive that well. So must of us upgrade to the 4441 or higher as even the 7100 can be quite finicky with bigger tunes. I was running the 8873 with a small tune and could never get it to drive right and consistent, but the 6006 took care of it. The real problems come in with the 9044 OS in 03+ trucks as there were so many different options in them whereas 01-02 didn't have half the stuff in them.

[horsehaulin]

The 6006 is the best one to run, it is considered a late OS. I run that one and it is a solid one to use.

[pavetim]

My stock tune in my 01 is 01887305 but I have a dsp5 tune in it now. Does the dsp5 change the OS or would I still benefit from changing the OS to another one?