2004 Chevrolet Tahoe oil pressure gauge

MARYBETTECREECH

MEMBER
2004 CHEVROLET TAHOE
125,000 MILES

I am thinking about purchasing a tahoe when I went to check it out I noticed that the oil pressure gauge was weird. When it is cranked up and sitting still the oil pressure gauge says its real low and then when you accelerate and are driving it is normal like almost in the middle. What could that be?

Wednesday, July 17th, 2013 AT 8:26 PM

1 Reply

CARADIODOC

MECHANIC
34,366 POSTS

That may be normal, especially if the pressure reads lower in hot weather or when the engine has warmed up. It is also somewhat common for the sending units to cause that. It can respond too much to small changes in pressure. A mechanic can connect a mechanical pressure gauge to see what the actual pressure is under different conditions. If it doesn't vary too much you might install a new sending unit. If the pressure does drop off quite a bit at lower engine speeds the oil could be diluted with raw gas from a previous running problem, or someone might have used oil that's too light at the last oil change.

Are you partial to GM products or would you consider other brands?

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Wednesday, July 17th, 2013 AT 9:31 PM