2004 Chevy Blazer Oil Pressure Gauge Drops When Vehicle is

2004 CHEVROLET BLAZER
110,000 MILES • 6 CYL • 4WD • AUTOMATIC
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PUNNERAB
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  • 1 POST
My 2004 Blazer is slowly breaking down in various areas, but here is a question I cannot figure out why?

My oil pressure gauge maintains at medium pressure when my Blazer is running at whatever pace, which of course is normail. But when I step on the brakes or come to a temporary stop, my oil pressure gauge drops down to quarter pressure (low pressure), and when I step back on the accelerator, it jumps right back up to medium (normal) pressure. It has been doing this for the last couple days (300 miles). I checked the oil level, it is perfect, and i have clean oil and have always maintained using clean oil.

Any answers on why you believe this is happening would greatly appreciated, and hope I can fix this problem myself.
Jun 16, 2009 at 9:04 PM
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SWILLIAMS
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Change the oil and install a GOOD filter. Then connect up a mechanical gauge and see what you really have. It could be a simple bad sender OR it could be a bad filter or bypass valve. The mechanical gauge will show you what it actually is doing.
Jun 17, 2009 at 12:58 PM