.tun file help for 98 ~ 00 Black Box 5.7 Vortec / 4L80E

[bmc10258]

Here you go this is from my personal 98 K2500 5.7 4L80E. I will be doing a 0411 swap on it very soon. Why not do the 0411 swap while you are at it. It will look factory and should pass a smog test. Say it was required in order to put the newer model year engine in the truck. Most likely they won't even notice anyway.

[dave w]

Here you go this is from my personal 98 K2500 5.7 4L80E. I will be doing a 0411 swap on it very soon. Why not do the 0411 swap while you are at it. It will look factory and should pass a smog test. Say it was required in order to put the newer model year engine in the truck. Most likely they won't even notice anyway.

Thank you very much!

I've thought about the '0411. Not sure if the '0411 will be the final decision. I'm in the research phase for the 98 PCM.

dave w

[EagleMark]

PM Lextech for a diagram, he's got them all dialed in for the 0411 swap, probably very easy to go 97 to 98, same plugs. little wiring change, PCM looks the same and drops in.

[dave w]

PM Lextech for a diagram, he's got them all dialed in for the 0411 swap, probably very easy to go 97 to 98, same plugs. little wiring change, PCM looks the same and drops in.

Excellent suggestion. If this was the original 1997 Suburban that I was converting to the '0411, I think Lextech diagrams would be used.

I've been thinking about some of the differences that might not be in Lextech diagrams, because of this diesel to gas conversion. The donor 1997 Suburban wiring harness is for the 4L60E transmission and the 1998 K2500 has a 4L80E. There are going to be some changes required in the donor 1997 Suburban wiring harness because of 4L80E transmission. The diesel computer is under the dash, so I'll need to splice some of the diesel computer wiring (TOSS, TISS, & VSSB comes to mind) from the old diesel computer into the donor 1997 Suburban harness.

dave w

[EagleMark]

Oh... wow... didn't realize the diesel PCM was different location, so gas motor and harness and PCM relocate? Big job...

Ahhh... doesn't the diesel use a different TCC? Stall speed?

[dave w]

Oh... wow... didn't realize the diesel PCM was different location, so gas motor and harness and PCM relocate? Big job...

Ahhh... doesn't the diesel use a different TCC? Stall speed?

Yes, big job.

I don't have the program downloaded from the diesel computer, so I'll need to do that and check the TCC parameters. Thanks for letting me know there might be difference.

dave w

[EagleMark]

I don't think stall speed is a PCM function? Have to check tranny specs on TCC. IIRC diesel TCC stall is much lower then gas...