SOURCE: oil pressure gauge stays at top, about 80 psi, is this normal
80 is on the high side for those... possibly a sending unit issue
SOURCE: When driving my oil pressure gauge and tachometer does not work
if its not a fuse check the speed sensor for the tach, and the oil pressure switch on the side of the engine block see if the lead came loose
SOURCE: In my 02' Trailblazer oil pressure gauge goes below 0
I have this same problem with my 2002 trailblazer; however, I goofed up and had a mechanic look at it, since I was perplexed as to what was going on with it. He told me the oil pump needed replacing and it ended up costing me around a $950. Needless to say, it still happens. A grand down the drain - it wasn't the oil pump. The oil level is always good. This generally occurs when I've run the vehicle for a while and then come to a stop. It occurs quite often during the spring/summer and doesn't happen all that much during colder months.
SOURCE: oil pressure gauge is reading 80 psi. I had the
The oil sending unit is located on the engine block behind the drivers cylinder head area.You have to climb up on the motor to see it cause it is hard to see behind the wiring harness.You may also want to purchase a new sending unit because it is very long and you might need to buy the sending unit socket to replace it.Hope this helps.Good luck.
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