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I've just disconnected the Vac line, nothing else and it seems to be working fine.

Good job Phil [thumbzup] You'll be :driver: in no time!

It sure does. I did mine cause the vac pump started making sounds and reading into it, I wasn't going to renew a weak system, instead I've used the Turbomaster and it sure was a different feel to it later as well, more responsive to the pedal. So far I've done the PMD relocation...

I forgot to add, you'll need the "VPW for GM and late DCX" cable from OBD-2.com price is $122 and download the "enhanced real time data base stream apps" for your engine from the download section. Also don't forget the "USB to rs232 serial port universal adapter" if your laptop has USB but no...

Yes, It can read & clear codes, & do the tdco learn on the 6.5's too.

As said, relocate the PMD (kit from Heath Diesel) and replace that stock harmonic balancer with a Fluidampr (also Heath Diesel) - I just did on my '98 Suburban 6.5 TD and it runs so much smoother now and I'll never have to think about a broken crank again because of faulty rubber in the stock...