Having problems with your 2003 GMC Yukon XL ?
Will driving the oil gauge went over to 80 & stayed there the oil level is normal
Sounds like the oil pressure sender unit has shorted out internally or the wire has come off and has grounded itself. If not the latter, you need to replace the oil pressure sender. It looks a bit like a small spark plug but with a black insulation and "should" have one wire attached to it.
Repair Help & Product Troubleshooting for 2003 GMC Yukon XL
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