Worked on our Rockettes 2010 Tahoe today. She texted me yesterday, and said the check engine light was on. No mention that the oil pressure gauge was at zero!
Did a scan and came up with the oil pressure sending unit going bad. Looked online, watched a few videos and got to work. The official way to replace it, is by removing the intake manifold. A few others, were able to replace it with the manifold in place and get a socket down at the firewall. This is the method I wanted to use.
The pictures online, I saw it easily accessible, but ours had the back of a beauty cover, hiding the oil pressure sending unit. There is no way to remove it, so I used a hacksaw blade to cut back the plastic just enough. It took a while, but I got it done. I did notice while replacing it, that the wires at the connector, were damaged*. I have a new pigtail coming and will replace that in a few days.
* I may have damaged the wires with the hacksaw blade, as it was behind the plastic cover. 🤬
