This is a code pointing to the APP I warned you about. I don't recall 100% if it's this specific code, but, we can verify it quick enough.65 - APP 3 circuit range fault
it was a purchase from Amazon. made in china. this may also be a culprit and didn't think about that. wires are thinner than whats in the OE harness. I may look into using the connectors and create a homemade cable using heavier wires just to rule out this as a possibility before throwing too much more money at diagnosis. afterwards purchase a better cable.Where did you get the PMD extension cable? It occurred to me some have had trouble with poor quality cables.
I would try that but I can't get the plug out far enough to reach. it was a chore to get the extension connected without pulling the intake!On a heatsink plug the PMD into the factory harness without any extension.
Thanks for the heads up. Ive got another APP on order. should arrive this afternoon. although the no throttle incident hasn't happened again I'm hoping that this will fix that and the thing where I can't hold the lower RPM steady in park. But I have a strange feeling in the back of my mind that the IP is warning me that it's time. she's got 275K miles now, I'm sure the IP was replaced at some point before I bought the truck but I figure I might as well start gathering parts and making plans to do the job soon. I figure if I'm going there I might as well look at a timing chain, water pump, and a set of marine injectors. I found out I can get a reman IP at my local Advance auto for around $700, not sure if that's best or just finding one in a junk yard and having it rebuilt.Similar situation, I replaced the throttle pedal sensor under the dashboard. Mine had just gone to idle speed with no acceleration. Could get it back if I shut completely off and re-started. Once I replaced it, no longer an issue.
yipes! they do show new Bosh and new AC Delco but they don't list them under application. I have to greb the GM part numbers to find them. which is a better one between Bosh and AC Delco? I looked on Leroy Diesel and Quadstar and both sites show Bosh. I've seen issues with the Bosh glow plugs breaking the ends off. are their injectors better?X2 on good injectors. The Commie China nozzles used in cheap rebuilds last 30K before they start sticking. Otherwise they are good for 100K miles. What CHEAP choice do you think your local parts store carries? Check the carnage thread for the melted and locked up piston a worn out injector gave to me.