2004 Chevrolet Avalanche Oil Pressure

2004 CHEVROLET AVALANCHE
208,370 MILES • 5.3L • V8 • RWD • AUTOMATIC
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RODNEYHICKS
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  • 1 POST
Oil Pressure Gage drops to zero and back up again, and reads low pressure; but truck has oil.
Jun 17, 2015 at 7:21 AM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
You need to double check the oil pressure. I can't rule out a problem with oil pressure sending unit? You may be able to use analog pressure gage in place of your sending unit to double check dash gage. Go from there.

Maybe you need an engine overhaul or issue with oil pump? I wouldn't do anything w/o further diagnostics.

Jun 17, 2015 at 8:48 AM
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JDL
  • ✓ASE Certified Mechanic
  • 16,098 POSTS
  • ASE Certified Mechanic
Just to add, for oil pressure, min. hot.
6psi--idle
18 psi--2000rpm
24 psi--4000 rpm
Jun 17, 2015 at 8:58 AM
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