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Thanks, I appreciate it.

Any chance you'd be willing to share the tune you're using on this? Did you segment swap?

(yes, I realize this was a decade ago)

Any chance you'd be willing to share the tune you're working off of? I have a buddy who wants to use a 2001 5.3 in front of his 700r4 but I have no idea where to start on the tune.

A buddy of mine wants me to flash his PCM to swap a 5.3 into his OBS Silverado. Anything special I need to do for the trans (segment swap?), or can I just use a 4.8 manual tran tune?

Thanks, HPTuners hooked me up with the segment swap. I appreciate it!

I have read (and regretibly licensed) the PCM. It is a 9379910 OS, so I'm quite confident you'll be able to help. I just sent an email in to tech support, I can send in the hpt file tonight.
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Any chance you have one with a 4l60e in that pile? I'll trade you for a copy with a 6.0l/4l80e.

I'm not questioning that you are being helpful, and I wasn't meaning it as a criticism or complaint, just making sure that the information is correct (so the next guy that searches and happens to...

I've got a 4l80e segment for that OSID... looking for a 4l60e. Who wants to trade?

I recently bought a 1999 truck PCM, and was told it was a 5.3l/4l60e, turns out it is actually a 6.0l/4l80e. From the sounds of this thread I'll need to segment swap, but I don't have a license for a...

Also, it appears you're wrong, there are 2 pins that need to be added to control the 4l60e, not 1.

I need to switch pin "S" to "U" on the trans connector, which is connected to #2 red on the PCM,...

I performed the work on the harness based on the assumption that it was a 5.3l harness (removal of rear O2s, tracing of front O2s etc). Seeing as I did not encounter anything outside of the expected,...

Research I have done indicates that ALL 1999 O2s use 4 wire case grounded O2s. Based on the info here: http://www.lt1swap.com/vortec_o2_sensors.htm, I do not have a splice in the Tan wires, so as far...

Thanks for the reply. When I started the swap, my intention was to use all 1999-2002 5.3l parts, I was mislead to believe my harness/PCM was from a 5.3 (until I read it into HPTuners, I had no idea...

I've got a 1999/2003 (1999 intake mani, TB, etc, 2003 block) 5.3l that I'm building to put into my 1993 K2500. I bought a used PCM and harness (for cheap) expecting to get a 5.3 configuration, well,...