My 1989 chevy c1500 scottsdale oil pressure is high

SOURCE: Chevy 350 - oil pressure drops at high RPMs

good evening and welcome to fixya
sounds like you might have an issue with your oil pump losing pressure. if there are no rattles knock or clangs and the engine is not burning oil, make sure to check the dipstick for signs of a glittery metal substance that could be signs also of the engine having issues then the pump is probably your issue. there is a spring inside the pump that you can actually take out and change for a heavier spring that would actually stop this but it is easier to swap in a new oil pump. i do have one question for you though, is this correct an s-10 blazer with a 350 in it? if so has the engine been built at all or is it stock? once you swap the pump go back to running a 10w 40 oil the motor will run better on that and easier, yes your right though the heavier oil does help but if everything is good then it will hender power unless the engine is fairly well built. let me know and i will help you solve your issue. thnak you

SOURCE: 93 Chevy c1500 transmission does not shift into high/

Most of the sensors are internal if its that much debree. U might wana look 4 a new/used trans.U can get 1 for about 600 dollars.

SOURCE: High Oil Pressure In My 1991 Chevy S-10 4.7 Blazer

gauge or sender may be faulty

SOURCE: 1993 chevy truck 4.3 oil pressure high to low

It may be a coincidence but try replacing the oil pressure-sending unit if it does not change try changing back to the original oil

old marine

• 2426 Answers
• Posted on May 27, 2010

SOURCE: diagram for the serpentine belt

Chevy made at least five different engines for pickups in 1989, and with a lot of accessory options. Check this link and select your pickup and engine size. When you get the listing of belts, if you see a small camera icon in the left column, click on it and you will see the diagram of the routing.