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.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
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
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?
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
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...
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
The diesel converter stalls a little lower than what would have come in that combination from factory. Even the factory converter stalls two low and makes the engine work just to pull away from a stoplight.
This past fall I rebuilt my 4L80E in the 98 K2500 because I broke the reverse band. I used a reman converter from a 99 G2500 van with a 4.3V6 and 4L80E. The converter code is B82. This is the highest stalling converter from factory for a 4L80E that fits the L31. You need the 6 Lug flywheel which you should be using anyway when swapping to the 4L80.
This was by far the best mod I have done to this truck. It gets up and goes at any speed and shifts and locks up perfect with the factory PCM and factory tune. With no codes.
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