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2004 tahoe z71 acting weird

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I have a 2004 z71 tahoe with 176k miles, lately it's been acting odd. There's an oil leak coming from the front right side of the engine, unknown as to where it's coming from but sometimes it will spot and others it will puddle, was told that it was a Jasper replacement 5.3 from a previous owner. Was originally told that it was an oil pan gasket which was done but this issue still persists.

Loss of audibles (chimes & radio) lately it's been working with the remote start but will sporadically go silent, there is a thud that comes thru the speakers indicating that power is there but not producing sounds (could the bcm either be on the way out or has it crapped???)

ABS, service 4wd, service tire monitors, low oil pressure all come on sporadically (low oil pressure when the needle rests at 10 psi but when gas is given and shoots back up to 40 psi it stops).

Any help with these issues is greatly appreciated

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Alternator was changed in January, battery is good and everything else is in good working order when it comes to the charging systemI will look into the ground within the cabin

It's not inside , it's on the body mount brace under your left foot

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