Need help debugging error code

Is the oil pressure gauge reading erratic? The oil pressure sensor is under the oil cooler module and will act up if there is oil leakage or spillage shorting the plug.

 

Here's a video on how to do o-rings and the suction manifold. My oil suction manifold actually had a triangular piece broken out and missing. Never did find the missing piece. Good thing I never let the oil level get low.



Oil pumps are about $450, or at least that's what they cost a couple of years ago. The first time I did o-rings I did replace the pump just for good measure. Second time I didn't replace it and haven't had any problems.

 

The first time I did it I had had the dealership do the work. They replaced the o-rings and the pump and set the jakes. Altogether it was about $1800, but that was six years ago. O-rings are not a big job. The biggest cost is the down time waiting for someone to get to it.

 

Check DDDL for codes and get the diagnostic procedures for the codes that look relevant to your problem.

First wild guess would be water intrusion in the samcab since you say it happens when it rains.. Could also be water leaking down the firewall under the hood. The drip guard on the firewall has a gasket that is single use so it may leak if it's ever been off.

The oil pressure sensor is on the engine wiring harness. The controls on the steering column are on the chassis harness. I agree both sets of problems seem on the surface like possible harness issues, but it's a bit of a coincidence that both harnesses would be bad at the same time.