One thing I have come across is that it may take up to 15-20 minutes of driving time above 15mph for changes to be reflected in the readout. Are you giving it that long to update?
Well, I finally went out and did this after work. Now all 4 are displaying, "--". :blah:
Further research indicates that the temperature sensor changed in 04, so I need an 04 or newer EVIC to show that... however the TPMS sensors changed in 05, and possibly 06-07 as well. So, really, I need an 05 EVIC+PSI. :favorites68:
Yeeeeah. Gonna drop this for now. It's not that important.
Judging from the parts fiche, what I need is PN 56010527AD, since mine had 56010520AD. I should have looked at that in the first place, it would have saved me a lot of time.
However, my gas mileage has gone up by about 2 mpg after the new plugs and air filter. So that's awesome. Getting ~20mpg at 70mph cruise speed now, on flat ground. Not horrible, my old truck got 17.5, so it's a decent improvement.