2004 GMC Envoy oil pressure guage

Hi there tom mcwilliams and TY for the donation this is what keeps the site going

What you need to do here is use a mechanical gauge -remove the oil pressure switch and hook up the gauge start engine and record the reading if normal replace the oil pressure switch anormal readings could be the oil pump pressure relief valve is sticking if its engine bearings you'll be hearing knocking noises if it has excessive clearances

Normal reading at idle is 8-12psi at 2K rpm the pressure should read in between 40-60psi