GMC: Oil Pressure Gauge Drops to Zero! Top Cause

Having trouble with your GMC Sierra showing no oil pressure on the dash? or maxed out oil reading? Watch this video for the most common cause and fix the issue.

[@davedeatherage4902]

Thanks for the detailed repair of this sensor, I've been subbed a long time to your channel. And learning five plus years off UA-cam auto repair as a Diy'er.im a senior and can't afford the shop, so I learn and do it myself. In future I will be doing a water pump and timing belt on my 2017 Ford fiesta, with an interference engine. 👍🇺🇸🙂

[@robinsonsauto]

Glad to help! Keep up that mindset and you will go far. Thank you for the kind feedback

[@eldoradony]

You are a better fisherman than I. The last one of those I did I dropped the old sensor, never to be seen again! There is a nylon screen that goes in the hole under the sensor. I never changed one but some guys do it as part of the job.

[@robinsonsauto]

😅 I got lucky. Yup they come with a new screen but honestly I haven’t seen one clogged yet. Changed out a few but then started skipping it. Probably a bad habit. I find a lot missing as well. I feel this is a common failure with or without the screen. They tend to last about the same, some fail high some fail low.

[@spelunkerd]

I did one of these last year on a 2000. That one had easy access and no screen, in contrast with some of the newer vehicles. I dropped a borescope into the hole to be sure. Mine, like yours, was leaking a bit of oil through the electrical connector, which in retrospect was the early clue.

[@robinsonsauto]

Thanks for sharing your insight. I find them missing as well. I used to replace every time but never seen one that justified the effort. If I had one that responded slow or took a long time to bleed down It would make more sense. Most that I see fail high or low.
Thanks for pointing out the oil in the plug that’s a great indicator!

[@jamesbruno5896]

That looks like a PITA, nice job Will.

[@robinsonsauto]

Sure is! especially if you have big hands

[@elcheapo5302]

The classic reach around! 🤣

[@robinsonsauto]

Lol grabber by the back side

[@petergarofolo9385]

Another great video 👍 👍

[@robinsonsauto]

Thanks for the visit and compliment

[@mph5896]

I have a 2009 Silverado. I have been through 4-5 oil pressure sensors in the past year. 2 Dorman and the rest OEM. Have tried with and without the filters. I might have a sticky oil pressure relief valve pegging full pressure cold and blowing the sensor out??? They go and then show no oil pressure. Weird.

[@robinsonsauto]

Thanks for sharing, see similar issues at times. Like a coin flip. These seem to be made very similar regardless where it’s purchased. Giving the year I’m assuming the OEM isn’t truly the OEM any longer. Outsourced most likely on the same production line. Screen or no screen replaced or left alone. They tend to fail high or low.

[@scuba422123]

hey will! you made that look easy do you ever find any clogged filter screens ?

[@robinsonsauto]

Honestly I haven’t, I used to change it every time and in some cases tried leaving it out. They tend to last or fail like flipping a coin. OEM or aftermarket. But at this vintage we can safely assume everything you purchase is aftermarket.

[@ryguy57106]

Hey will great video!!! I got a 1989 Chevy thunder ha temp gauge maxed out. Replace sensor. Any ideas?

[@robinsonsauto]

Is it always maxed out even when cold? if so try unplugging the the sensor. is it still maxed? I'm pretty sure this is a ground driving circuit. if possible trace the wire back and make sure its not shorted to ground.

[@kj197734]

See, some mechanics claim you have to disassemble half of the engine to get the oil pressure switch replaced.

[@robinsonsauto]

It’s possible to do just not the best on your body and mind 😅

[@mph5896]

I made a post above on replacing 4-5 of them on my truck. I can replace one in about 5-10 minutes.