98 Suburban 4wd 5.7 to 01 6.0L questions

[Lextech]

I had a thought with my fuel gauge issue, and yes I know it may be extreme. I'm thinking of getting a newer fuel tank from a Suburban to replace my 98's. That way I'll be running the newer fuel tank and fuel pump assembly and should have no issues with the LS ECM reading the fuel sender. The only issue that I see could be that the stock 98 gauge would still not read the info coming from the LS ECM - does anyone have any experience with this.

I have never tried that, BUT, I don't think so. The issue is not the PCM receiving info from the fuel sender. The issue is the PCMs output to the gauge. It needs to be changed in the tune.

Jeff

[genIIIdude]

That's what I figured, or we'd see more people going that route. I'll have to get my tune changed back to a MAF and then send you the computer, and at the rate I'm going that could be awhile!

What about my tach? Is there a way to change it's parameters in the ECM with HP Tuners?

[kewljay223]

What about my tach? Is there a way to change it's parameters in the ECM with HP Tuners?

should just be adding a resistor. worked for me.

http://lt1swap.com/lsx_tach.htm

[genIIIdude]

That's what I needed - Thanks.....

[genIIIdude]

Well finally got the tune figured out and everything is working well. I hadn't really driven it until tonight after a tune session and noticed the speedo doesn't work!? It reads on my computer while scanning but not on the gauge, any suggestions of where to start? Thanks....

[kewljay223]

depends how u hooked it up. are you using the new pcm to control it or did you leave the speedo hooked up the way it was? im guessing your using the new pcm. in that case its probably a matter of it being in the tune or something to do with your vss signal.. im leaning towards vss wiring because if it was a tune issue, either its not calibrated at all (unlikely) or there is a wiring problem...

this is just guessing since i dont know exactly what you did. post a little more info

[genIIIdude]

I corrected the tire size/gear ratio in my tune, but still no speedo. Also, after I reprogrammed, the tach doesn't register at all now. Any thoughts? I'm running the LS PCM only....