Bad Oil Pressure Gauge Or Bad Oil Pump?


Asked by Jul 25, 2013 at 08:55 PM about the Chevrolet C/K 10

Question type: Maintenance & Repair

Ive got a 1985 Chevy K10 with a 305 TPI out of an '86 IROC-Z. Truck has 124,XXX miles and the engine has a little less. My
oil pressure gauge is usually around 30 PSI but sometimes it'll drop to around 15 PSI if ive been driving for a while or i'm on
the highway or something. It has done this every so often for the last few years and its finally getting to me so I figured i'd
see if anyone has any ideas. I'm not low on oil, truck doesn't run hot or make any odd noises so in your opinion do you think   
the gauge is off or the pump is bad?

2 Answers

It's gotta be the pump cause the same thing happened to my Uncles truck just a bit ago


nothing is wrong with the truck. That is normal operation, after a longer trip or highway trip the oil is hotter therefore thinner. Thinner oil develops lower pressure. 15psi is more than enough to lubricate the engine at idle or a little more. The only time is should be a concern is if it stays at 15psi at 4500 rpms

Your Answer

Chevrolet C/K 10 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Chevrolet C/K 1500
888 listings starting at $3,195
Used Chevrolet Silverado 1500
2,084 Great Deals out of 181,984 listings starting at $1,898
Used Ford F-150
2,189 Great Deals out of 182,390 listings starting at $1,000
Used Chevrolet Camaro
412 Great Deals out of 31,803 listings starting at $2,395
Used GMC Sierra 1500
762 Great Deals out of 67,981 listings starting at $1,350
Used Chevrolet S-10
6 Great Deals out of 1,283 listings starting at $1,800
Used Ford F-100
164 listings
Used Chevrolet C/K 2500
203 listings starting at $6,499
Used Chevrolet Blazer
3 Great Deals out of 1,152 listings starting at $950
Used Dodge Ram 1500
402 Great Deals out of 10,682 listings starting at $1,500
Used Chevrolet Impala
578 Great Deals out of 34,582 listings starting at $1,250
Used Chevrolet Corvette
241 Great Deals out of 22,125 listings starting at $2,500
Used Ford Mustang
752 Great Deals out of 42,443 listings starting at $1,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.