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Does anyone have a MagnaCharger base tune for an '02 Denali XL?

Well it was worth a shot. Have you looked at the pcm pin itself? On odd occasions they will recess & you have to pull them out with some needle nose pliars. I'm just throwing it out there as it...

It could be that the HO2S low signal wires are not fully pinned into the pcm.

I had similiar problem with my Bank 2 Sensor 1 and it turned out to be the low signal pin was not making full contact...

I wouldn't worry about hijacking, it's his thread anyways. :grin:

Silly question, was the 411 flashed over with the appropriate OS/calibration before you fired it up? Also, what OS/calibration is in your friends rock crawler pcm?

You will have to change that "Generator F-terminal" (P1638) to "not reported" as opposed to "non emissions" in the engine diagnostics/DTC/MIL. That will get rid of the light & code.

Also, if you...

Are you sure? Just lift the little plastic tab & push the pins out. There's no need to cut, crimp, & solder anything for a repin.

If you're still under a warranty & need to take it in for any repair/TSB work, than yes. It also never hurts to have another one handy that works & has already done the CASE relearn. In a pinch, you...

Repin that S10 to a 12200411 pcm and use your V1 for both vehicles.

Was that a transpose with the temp? It should be at or above 150°.

Were you getting a P1336 code before? Is it gone now? Hook up the scan tool & pull the codes to see what you get.

Safe travels Taz.

I tried running the check for updates previously and did not receive an update. It was running on Build 130, Build 111, & the firmware was the latest 2.06.40.

Thank you for the links. I will...

Well I've been doing some back & forth on another issue, thread link below:

http://forum.efilive.com/showthread.php?14386-How-did-others-fix-this-U1255-code/page1

After a little break I decide...

The base tune was downloaded from the Holdencrazy site. I just gave it a whirl & the normal (non highspeed) flash would fail. It would repeatedly attempt to replace/retry blocks. The highspeed would...

This particular pcm was purchased from another forum member who had this 0411 running in his GMT400 Tahoe. I am not certain where he acquired the pcm. His tune had an '02 extended cab VIN with the...

I was out scanning again & selected some pids. A few things caught my eye:

1. Battery Voltage showed 0 across the board.
2. Engine size had 5.3.
3. Ignition timing advance for #1 cylinder is...

When the charge completed, it was holding 13.01 ish volts.

It's interesting, just got back from hooking up the scanner & no more U1016. That was odd as I was going to do the security relearn...

I connected the battery after it was charged and still wouldn't fire up. One code gone & another pops up in its place. :doh2:

U1016: Loss of Communications With PCM

Seems I need to do a...

Thanks Taz for the detailed info.

Out of curiosity earlier I did enable the VATS with class II as well as do a relink. Low & behold, no more VTD codes. While researching I stumbled across info...

Correct

This is a conversion for my GMT400 '99 Tahoe.

- 16263494 black box (09365085 os) to 12200411 pcm (12212156 os)
- 5.7L (L31) / 4L60E

I installed a new pcm and was able to successfully do a CASE relearn. Now I am having start problems, as in not at all. It turns over & wants to crank but it is a no go. :shock: I've disabled the...