Just the sensor?

[daven]

Tonight on the way home from work I looked down and tne oil pressure gauge was pegged. I know it wasn't like this at lunch. The truck seamed to be running just fine when I got home. I shut it off and turned the key to run and the needle pegged again. The other gauges are all working fine. So after looking around on the site, I believe that all it is wrong is the sensor went bad and needs to be replaced. I can't figure out why the engine would all of a sudden have a massive increase in pressure. Any advice/suggestions/insight is appreciated.

06 Tahoe w/ 5.3 and 125k miles

 

[Rivieraracing]

If not the sensor it might be the stepper motor in the gauge that went bad!

 

[SLCHOE]

Most likely the sensor. I just changed mine out because it did the same thing.

 

[BRUTUS_T_HOG]

Well to verify it is the sensor you can disconnect it and turn the key on. It's on the back of the engine.

 

[Gatorlac]

if it pegs without the engine running but goes down at the "off" position its the sensor, need to replace mine as well