[dmarty]

I hooked up an auto-ingenuity OBD II PC to it and found that the ECT readings are as expected. Up stream O2 sensors on both banks are cycling, but I'm not sure how many counts there should be. At idle I'm geting about a half count per second and 1 to 1.5 counts per sec at 1500 rpm. Both banks are the same. Long term fuel trim is -3.9% #1 and -4.68% #2. Are these numbers reasonable? Is there a good manual out here for these trucks that would give the normal values. I have the official three volume GM manual from Helms, but it is of little use.

Never checked compression, but it runs fine and gets 15 MPG at 75 MPH so it can't be too bad.