Hello everyone 1st post. Hopefully someone can point me in the right direction.

I have had my 05 Escalade since Feb, no problems.

In May I put some 24 inch rims and tires on it. Everything fine. Last week I put the OEM tires back on for the winter. Well the next day I went out of town (80 miles round trip) and on the way home my oil pressure dropped to zero.

The next day I started it up and the oil pressure was fine so I took it to the Cadillac dealership. Everything seemed to be fine. They couldn't find anything wrong with anything. I had them change the oil since I almost due for one.

Haven't had the oil pressure drop since but it still worries the crap out of me. Does seem to run just littler higher now but maybe that is because I am watching it all the time now.

I seem to recall them having to recalibrate computer when putting 24's on but then when I had OEM's put back on they said it didn't need recalibrated. I told them I thought they did when the 24's were put on. I'm pretty sure I did.

Now the dumbest question ever (take it easy on me lol), would the computer not being recalibrated (if indeed I did have it done when 24's were put on) have anything to do with the gauges? Or was it just a coincidence?

cold weather be attributing to the problem? It was very cold the night the OP dropped, hasn't been near that cold since. Just your normal 45-55 degree Maryland fall weather.

I usually don't drive it except around town so maybe it was an issue before but didn't notice until I drove it longer?

I'm just lost here and not sure I trust the dealership now

Welcome to the forum! Another member had a problem with his oil pressure reading, it was the sensor, located top back of intake. You can find pics and info on the subject if you do a search. Recalibration won't cause something to go wrong with the dashboard. Keep us posted.

Oil pressure sending unit...pain to get to on the back of the intake manifold basically under the cowling.

If it were to actually drop to zero you would know it.It would rattle like mad.

thanks, guys. I'll let the dealership know about it.

I am skeptical about them (dealership) so I have another question. When I first bought the Escalade in Feb. I took it to a Jiffy Lube for oil change because they always did that on my other vehicles. The guy mentioned something about a oil line clogging up so I took it to the dealership and they said they didn't see anything wrong. Is it possible Jiffy Lube was correct and that is what is causing the issue?