That appears to be a regular LS1 99-02 512kb PCM, so yes you can flash a 2002 OS in and use a COS.
That appears to be a regular LS1 99-02 512kb PCM, so yes you can flash a 2002 OS in and use a COS.
~Erik~
2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.
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1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
Warning flashing a truck os12212156 that had a 4l80 will not work well
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1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
Hi Ritch,
TIS reads zero always.
No shifting above 2nd.
TSHIFT pattern is toggling between 2WD and 4WD.
Looks like is applying the TCC in 2nd but TCCSLIP is not dropping down.
Some things are all wrong... was this a full flash or a cal-only flash.
Can you flash it back to original...?
Can you post the tune from the truck prior to flashing, and the tune flashed in.
That PCM might not be compatible.
I did flash the original back in. I had copied an OS with 4L80 trans, and 4x4 apparently. I'm halfway through converting a 2002 Camaro 5.7 A4 bin. Get back to it tomorrow.
Edit: The Camaro tune cause issues with theft,gear selection and TCC upshift. Now using 2002 truck OS much more successfully
Last edited by Ritch; May 15th, 2010 at 03:56 PM.
OK not that successfully
http://forum.efilive.com/showthread.php?t=13664
____________________________
1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
Was this PCM previously 4L60E...?Originally Posted by Ritch
Warning flashing a truck os12212156 that had a 4l80 will not work well
Joe, I assume it was because 4L80 is in the Vehicle Identifiers under Calibration. I could change the VIN, but the rest stays the same.
Sanity check: you did do a full flash...?
yep, did the full flash with 02 camaro, 02 truck and 01 Tahoe. The truck and Tahoe ones caused the TFMS to drop to zero when throttle was zero.
____________________________
1999 GMC, rcsb, 2wd, 5.3, XR275HR-12
Radix magnacharger mp112
Long tubes true duals, $L60E
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