Rpm are not steady when stopped at a light.
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Where is the oil pressure sensor located on the 5.3 liter V-8 in 2008 Chevy Tahoe.
Oil pressure gauge is reading 40 psi and the ck engine light is on with low oil pressure warning.
And when I do have the instrumental clusters (gauges) then they will go around erratically. Latel...
Above happens when cold usually. Dealer can not diagnose problem. Check engine light comes on. ...