2018 silverado oil pressure gauge fluctuations. I have a 2009 Chevy silverado 5.3 and it had a code PO521 so we changed the oil sender and the valve lifter and filter and the code ... If you are reading low pressure on the mechanical gauge, then you definitely have a mechanical issue. ... The engine control module monitors the oil pressure and is looking for fluctuations based on that valve ...

3885 posts · Joined 2009. #3 · Jun 30, 2018. I believe that the reason you only hear about it on 05-06 models is that in 07 onward, they changed the pressure gauge to a dummy gauge. Rather than reading exactly what the pressure is and fluctuating as the pressure changes with rpms, it's now a "Yes, there is pressure" or "Nope, no pressure".

2018 silverado oil pressure gauge fluctuations. 4. Repeat the process on the LH mount starting at the rear bolt at position 3, front bolt at position 2 and the middle bolt at position 1. If idle vibration Does Not return when the RH or LH engine mount bolts are re-torqued to specifications, remove the old bolts and discard. Replace the bolts with new ones.

508 posts · Joined 2013. #20 · Jan 21, 2017. The oil pressure is linear formula with rpm. You should get 10 psi with every 1000 rpm. I have innovate motorsport gauge as well and I dont have any flactuating at all only 1-3 psi. I am getting the measurement from the rear oil galery under the intercooler.

Advertisement Oil-fired burners are used in many parts of the country as the basic heat source for warm air and hot water heating systems. Most of the home oil systems in use today...This is the first step to fix any oil pressure gauge problems. Check the oil level using the dipstick and ensure that it is at the recommended level. Also, ensure that it is of high quality, clean, and contaminant-free. If the level is too low, top it up to the recommended level. Poor quality oil should be changed.

Hey guys, I have an 09 Silverado 1500 5.3 and I have been having issues with my oil pressure gauge. I was driving on the highway and it suddenly dropped to 0 psi then after a few minutes it jumped to 80 psi and now stays on 0 all the time. I figured just simply the sensor waa bad since the guage was fluctuating so I replaced the sensor.PaulTahoe. 30 posts · Joined 2021. #5 · Mar 18, 2021. I sold my Ford and bought a High Country 3.0 in late 2020, and that little 183 cubic inch motor amazes me every time I drive it. In my opinion 20 PSI is more than enough under light motor load, and if you notice throttle and RPM with the "drive-by-wire" system auto increases the oil ...Cold start at idle it is right about 40 PSI. If I drive away, (always gentle on it when cold), the pressure will push 60 PSI at about 1500 RPM. As the oil temp warms up, the normal "hot" pressure is 40 at idle, 55 at highway speeds (around 1800-2000 RPM). If I step on it and get the rpm up to 3,000 it will still hit 60 PSI.Cold start at idle it is right about 40 PSI. If I drive away, (always gentle on it when cold), the pressure will push 60 PSI at about 1500 RPM. As the oil temp warms up, the normal "hot" pressure is 40 at idle, 55 at highway speeds (around 1800-2000 RPM). If I step on it and get the rpm up to 3,000 it will still hit 60 PSI.The Chevrolet Silverado oil pressure sensor issue is a fairly common one. Here's why it happens and how you can fix it at home. Skip to content (855) 505-2886 Sales lines are open ... You could be driving along and notice the oil pressure gauge fall to …Feb 18, 2024 · Had all kinds of issues such as tach, oil pressure and temp gauge fluctuating. Stabilatrack, service 4wd lights on. With check engine. Had codes for no ecm communication u0100-00 in ccm, ebcm, pscm, and bcm. Pretty much every except tcm. Also had other codes for invalid data. Really seemed like ground issues. So after checking and much frustration.Ask Someone Who Owns One. * All fields required. The 2002 Chevrolet Silverado has 1 problems reported for oil pressure gauge fluctuating. Average failure mileage is 215,000 miles.Reasons for a fluctuating oil pressure. While it is normal for an oil pressure gauge to fall and rise while driving, here are some reasons why it happens. 1. An actual automotive problem. An oil pressure gauge can rise and fall if the car has an automotive problem, but it is rare. 2.

2018 Chevrolet 1500 CC 4X4 High Country 6.2 liter 2019 Chevrolet 3500HD CC 4X4 Flatbed--SOLD 2011 Peterbilt 337 hauler with 360HP 8.3 Cummins--SOLD 1957 GMC 1 ton flatbed with 22K original miles. 3 different Kubotas 2003 Chevrolet 2500HD CC: 2011 Chevrolet 3500HD CC 4X4 and 2013 3500HD ex. cab 4X4-- all sold. :grin2:If this occurred in an L99 much of it has to do with the active fuel management. The VLOM that controls the oil spraying into the cylinders that shut down can cause oil to not flow as it would. The LS3s don't have it however as you noted there is a screen under the oil pressure sensor that often gets clogged more often on the L99.Jul 17, 2014 · My question is what is Normal oil pressure I have the 4.8 motor when motor is at normal operating temp ( 210 ) and while sitting at a light my pressure drops to between 25 28 pounds IS THIS NORMAL . While driving at 40 MPH the pressure is 40 pounds is this normal at 65 MPH it is around 44. I run 5-30 oil (Castrol ) Synthetic with a AC oil ...1 2. ASTE25. 13239 posts · Joined 2011. #2 · Sep 3, 2015. I would suspect a bad oil pressure sensor. I would suggest before driving it (or starting it) to take the sensor out and installing a manual oil pressure gauge to check to see if it actually has good pressure. Low oil pressure can destroy an engine in no time.

HELP!! '98 K1500 5.7L Vortec. I have a 1998 GMC K1500 Z71 offroad with the Vortec 5.7L 350ci V8. Purchased in Kelowna, BC in October 2013 at 157,000kms (98,000mi). Currently has 164,000km (102,500mi). Nothing else done to the engine this far. Idle is 600RPM, my oil pressure fluxuates from nearly 0 at idle and back to normal (275kPa/40PSI) at WOT.

116 posts · Joined 2002. #4 · Oct 8, 2006. just removed the oil pressure sender its located by the oil filter and clean it out spray it with some carb or fuel injection cleaner you might get away by just cleaning it this way. 1981 Toyota Celica GT 500000 mi original engine/tranny with 79 Supra F312 rear. 1996 Lexus LS 400 240000 mi and going ...

07 Sierra 5.3 Oil Pressure Issues. Gentlemen; i have a 2007 GMC Sierra SLE 4X4 5.3 that has 243K on her but runs fine have replaced oil pressure sending unit twice (which by removing a portion of the rear manifold back plate plastic hose holder became an easy project) and still have intermittent oil pressure readings and when i turn on ignition ...448 posts · Joined 2010. #2 · May 19, 2010. Your oil pressure SHOULD go up when you hit the throttle. The more RPMs the engine turns,the more the oil pump turns. When the engine is cold, you will have more oil pressure then when its warmed up,too. At 40psi...that sounds right. 2004 Silverado 2500HD LT 4x4 QuadraSteer.Mar 4, 2023 · Find the sending unit’s location on the engine block to replace the faulty one. It’s often near the oil filter housing. Remove the old sending units from the engine block by unscrewing them. Then, place the new one into the engine block and screw it. Also, reconnect the tubes to the new unit and the oil pressure gauge.The Chevy Silverado is a full-sized pickup truck. It uses an ABS system to monitor the brake pedal pressure and pump the brakes automatically for drivers if the wheels lock up. Thi...About 2-3 seconds later the battery light comes on, the ECT, oil pressure, and fuel gauges goes to "zero", and the low fuel light comes on. The truck runs just fine, no hesitation, stalling, odd noises. The tach, speedo, and trans temp work just fine. The CTS2 Insight gauges all freeze (ECT, boost, FRP, DFRP, turbo vane position) except for the ...

If you unplug the sender the gauge should go to the top, and if you ground the wire to the sender it should go to zero. I just checked, the needle drops below 275 kpa (40psi) when i turn the key to the "on" positon. then when i start the engine and let it idle ,the pressure goes up to about 343 kpa (50psi).Jul 24, 2018 · The oil pressure gauge going to 60 lb. over 3700 RPM, is the calibrated engine speed the oil pump goes into the high-pressure stage. No repairs should be attempted, this is normal operation for these engines. Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without ...An oil pressure sensor or switch sends signals to the engine computer, and may also directly or indirectly trigger your oil pressure gauge or low-pressure warning light. If the oil pressure sensor or switch in your vehicle stops functioning properly, it could provide inaccurate readings or fail to send oil pressure measurements at all.Apr 21, 2019. #1. Own a 2002 Chevy Silverado with 380k miles on the original engine. For a few months now I've been noticing the oil pressure gauge needle bouncing around. This morning the dash light "Check Engine Oil Pressure" came on and noticed that the oil pressure gauge needle was at Zero while at a Stop sign.1998 k1500 OIL pressure switch. so lets start with the description. 1998 chevy k1500 5.7 V8 Z71. i recently replaced fuel pump, intake manifold gasket, and oil pressure switch. i had great oil pressure after i did the intake manifold gasket. about a week after i started to notice that my oil pressure would drop to almost 0 once stopped at a red ...If this occurred in an L99 much of it has to do with the active fuel management. The VLOM that controls the oil spraying into the cylinders that shut down can cause oil to not flow as it would. The LS3s don't have it however as you noted there is a screen under the oil pressure sensor that often gets clogged more often on the L99.When I don't get oil pressure, Gauge reads zero, and truck gives me a warning to shutdown the engine. ... Lifetime Silverado driver. Save Share. Like. ... 2018 1500 LT2 Z71 CCSB 5.3, Diablew tuned, Airaid MIT, Carven progressive catback, Lasfit LED D5S, DD SS3 MAX fogs, Morimoto LED's for the rest, heated wheel retrofit, scamsoil in …13240 posts · Joined 2011. #2 · Jan 12, 2012. My guess would be a bad oil pressure sensor. I believe it is on the top rear of the engine near the drivers side cylinder head. I think you can do like the old ones and ground the lead or pull it off the sensor to see if the gauge changes, but you may want to get a factory service manual to find ...12551 posts · Joined 2015. #4 · Aug 5, 2021. It could be the oil pump and/or the O-ring that seals the oil pick-up tube to the oil pump. The O-ring can get hard/brittle over time and cause low oil pressure. Oil pressure should be verified using a manual gauge, not just the dash gauge.May 19, 2010 · 448 posts · Joined 2010. #2 · May 19, 2010. Your oil pressure SHOULD go up when you hit the throttle. The more RPMs the engine turns,the more the oil pump turns. When the engine is cold, you will have more oil pressure then when its warmed up,too. At 40psi...that sounds right. 2004 Silverado 2500HD LT 4x4 QuadraSteer.I have a 03 Silverado 2500HD with the 6.0L gas motor and my oil pressure gauge fluctuating while I am driving on the flat free way in overdrive and not chang...My oil pressure gauge does all kinds of weird things. I thought it was the sending unit. i replaced the sending unit, with what turned out to be a bad unit. the gauge still didn't work and I got a DIC warning saying no pressure. Put a 3rd sending unit in and the gauge is still messed up but the DIC warning is gone.Fluctuating Oil pressure troubleshooting. Hey, I have a 2009 GMC sierra 5.3 L V-8. About two months ago when I was on the highway I looked down and noticed my engine light was on and my oil pressure was around 20 PSI. I turn my tuner on and saw that the engine Was saying low oil pressure so I pulled over.You spread of 3 volts from 11.5 to 14.5 is the same spread that is called out here but it is a little low. The reason, I suggest you get it documented is for two reasons other than you are clearly under warranty. First, it could just be a drained battery from sitting on the dealer's lot.The valve prevents oil from flowing downwards and away from key engine components when the engine is idle. The oil supply channels within the engine leak oil if the valve is missing. After starting the engine, the oil pump will need a few seconds to refill the supply channels. During those few seconds, the pressure gauge reads relatively low.A quick and easy video: How to reset the oil life monitor/light/message on a new (or brand new) Chevy Silverado.This applies to both gasoline and diesel vers...Oil gauge fluctuation. Just purchased my truck about 3 weeks ago and looking for some insight. My 2011 only has 66k miles on it and I haven't gotten the AFM disabled yet. I noticed last week that when driving my oil gauge is sitting at 45-35 when it gets warm. During idle however it is sitting almost exactly at 20 and occasionally idles "tough ...Chelsea has four reasons why she loves this rain gauge — and she'll share them in her latest 'Cherry Picked' review! Expert Advice On Improving Your Home Videos Latest View All Gui...A manual gauge will have a 1/4" copper tube or plastic tube from the engine to the gauge. I would look at the oil pressure gauge and see if it is a 60 or 80 psi gauge. IIRC, the non-labeled gauges are 80 psi gauges. Buy a new sender, due to its age it's probably failing, for the gauge; either 60 or 80 psi.

The oil pressure will be slightly lower at idle, normally between 20 and 30 PSI on most car engines. Normally, it won't go below the specified parameters set by the manufacturer. If the oil pressure drops too low during idle, it could indicate that the level is low and needs to be topped off.Oil light has never come on, but I also don't want to assume the gauge is 100% correct (pressure sensor and filter were replaced about 3 months ago). 2013 Silverado 1500 LT Crew Cab 4X4. Silver Ice Exterior. V8 5.3L Vortec w/ 6-Speed. OPTIONS/ADD-ONS: 6" chrome tube step bars, Protection package, Rear bumper step, …If this occurred in an L99 much of it has to do with the active fuel management. The VLOM that controls the oil spraying into the cylinders that shut down can cause oil to not flow as it would. The LS3s don't have it however as you noted there is a screen under the oil pressure sensor that often gets clogged more often on the L99.It is an adapter that bolts on near the oil filter. here is the link to the part I am talking about. https://amzn.to/2WjLNQN. it even has 2 ports that are 1/8" NPT for easy connection of extra gauges for items like OIl …Oil Pressure Gauge / Sending Unit Wiring- 2002 Duramax LB7 replaced with a 2003 LB7. I have a 2002 Silverado 2500hd with a 2002 wiring harness (truck side) connected to a newer 2003 LB7 engine with a 2003 wiring harness (engine side). As discovered and documented by Flyingsquirel above, I had the same problem with the oil pressure sending unit.Oil pressure must go up with higher rpm's. 38-40 at idle and 60 or so at high rpm would be more normal for that truck. I'd guess you have a gauge problem (common on that generation truck) or a sending unit problem. '13 SLE 4x4 ExtCab 5.3 6sp 3.42 G80 Z82 Z60 Fire Red. Bought new. 25,700 miles. Frk9100.Troubleshoot. 2018 Chevrolet Silverado 1500: Complete Maintenance Schedule. 1 month ago. 04/22/2024. The Motor Guy. 04/22/2024. Maintain your 2018 …

May 11, 2023 · Engine predominantly ran colder than right in the middle of the gauge (around 190 degrees) and oil pressure sat a steady 40 psi cruising. Now after an oil change the oil pressure fluctuates when cruising (between 35 - 55 psi) and the temp has been sitting at 210 degrees (right in the middle of the gauge) and fluctuates up too 215 degrees while ...If the oil pressure gauge in your Chevy Silverado, Avalanche, Tahoe, or Suburban is reading no oil pressure, excessive oil pressure, or if the oil pressure g...Oil light has never come on, but I also don't want to assume the gauge is 100% correct (pressure sensor and filter were replaced about 3 months ago). 2013 Silverado 1500 LT Crew Cab 4X4. Silver Ice Exterior. V8 5.3L Vortec w/ 6-Speed. OPTIONS/ADD-ONS: 6" chrome tube step bars, Protection package, Rear bumper step, Line-X Bedliner.This is the first step to fix any oil pressure gauge problems. Check the oil level using the dipstick and ensure that it is at the recommended level. Also, ensure that it is of high quality, clean, and contaminant-free. If the level is too low, top it up to the recommended level. Poor quality oil should be changed.Troubleshoot Oil Pressure Guage 92 K2500 305. I picked up a non-running k2500 that had been sitting for 6-7 years. It has the 305 small block. I replaced the distributor and in doing so, primed the oil pump. I could see oil coming up into the valves through the oil fill hole, so I am confident that I have oil pressure.The only time I can get it to go above 35 psi now is if I push the engine hard, like around 2500-3000 RPM. But at normal cruising speed around 60 mph, 6th gear, (with the 3.42 ratio) it's around 30 psi. I'm due for an oil change in another 1,000 miles so I may top it off, get the oil changed, and see if it happens again.Starts up at 40 plus and even up to 60 while cold. Once warmed up pressure drops. Runs 40 on highway and 20 at idle. I removed lower pressure relief valve from oil pan. Put a good oil filter in and using 5w30 oil. Ive done compression checks.12 posts · Joined 2017. #1 · Feb 21, 2018. A few weeks back my oil pressure was lower than normal. My 5.3 is normally at 40-41 psi at idle. It was low at about 26 ish. Today when I was driving it suddenly went to 80psi and at idle around 76. When I turned the truck off and just turn the key on it goes up to about 43psi.26 posts · Joined 2015. #3 · Feb 27, 2021. Here is how the oil flows in the 5.3 AFM engine. 706 - Oil Pressure Sensor. 451 - Vavle Lifter Oil Manifold. 452 - Valve Lifter Oil Filter. 455 - AFM Oil Pressure Relief Valve. public image upload. 2007 GMC Sierra 1500 SLE - 4x4, 5.3l AFM - Flex Fuel.5 posts · Joined 2018. #1 · Apr 24, 2018. I have a 2011 Texas Edition Silverado V8 5.3 Liter. 3 weeks ago the oil pressure pegged out. I had it replaced at a Chevy dealer. This particular chevy dealer has done all the work on my truck. The oil pressure usually read between 22 - 32 psi normally. This seems to be normal.Silverado oil pressure gauge fluctuations in water; Fluctuating Oil Pressure Chevy Silverado. Air, the other part necessary is almost a given, but just make sure there is no restrictions leading into the EFI unit. When the customer encounters a low oil pressure gauge reading or illuminated low oil pressure lamp, it results in a panic situation.Advertisement There are two LP gases that can be stored in liquid form with only moderate pressurization -- propane and butane. Isobutane, which has the same simple chemical formul...It's not too late to refill the Strategic Petroleum Reserve In 2022, the US government helped fight inflation with a smart oil trade: Selling from the Strategic Petroleum Reserve (...3. I try to watch the gauge now and what started happening was that after about 3500-4000KM i would notice that the oil pressure gauge would go from running just under half. (275 on my gauge see picture attached) to just over the 1/4 line. If I changed the oil it would go back up to the half mark and stay there again until another 3500-4000 KM. 4.Mar 9, 2020 · Another one with oil pressure sensor issue. P0521 code. Back story. 2010 Silverado 5.3l 138,000 miles. Due for an oil change. Oil pressure reads between 30-50 psi. A couple weeks back, oil pressure dropped to 10-30 and the MIL came on, code read as oil pressure sensor. Watched all the youtube vids on how to replace.I understand the sensors are most likely different as the S10 is a 4Cyl and my Silverado is the 5.3L V8. ... Initially after starting engine, the oil pressure gauge stays at 40psi or just under. Even once engine has reached operating temperature the gauge doesn't move until after driving for at least 5 minutes. Then the gauge starts reading ...Just got my 1st oil change done. I never noticed before but now I'm getting a large amount of fluctuation on my oil pressure gauge when RPM's increase. Normal idle and run is around 30psi, With RPM increase it will spike to 80psi and then drop back down depending how hard you get on it. ... 2018 EB Fastback Premium w/PP 1994 Cobra Coupe SVT ...LQ4 Oil pressure gauge fluctuations, sending unit repla. Jump to Latest Follow 1K views 1 reply 2 participants last post by davester3500 Feb 21, 2022. M. mrrcx1 ...Sep 26, 2012 · The battery gauges on most vehicles I have owned stays around 13 to 14 volts and doesn't move much unless something that consumes a lot of power is turned on. Mine does this with nothing additional running on the truck other than the radio and a/c. This morning the needle was about 1 volt below (13 volts) the middle mark (14 volts) on the gauge.

I'll get an low oil pressure warning get back on the throttle. And the coolant gauge is worse. Factory gauge reads 210 and on edge is 185. Factory gauge doesn't move to 215 and then starts to rise. 2010 Gmc 2500 Duramax 853,500 Odometer miles - sold Nov 2018. 2013 LT CCSB SRW bought with 508,000 miles, now over 703,000 miles.

Nov 23, 2023 · 2011 Sierra 5.3L Oil Pressure Fluctuation. I’ve looked through a good number of the threads on here and haven’t quite found anyone with the same issue I’m having. So while cruising down the interstate, my oil pressure will fluctuate between roughly 22 and 32 PSI, with no change in speed or RPMs. It just sorta bounces back and forth, but ...

Nov 12, 2020. #1. I started a new thread as to not hi-jack 08AvalancheBC. Plus, mine is a 2005 Z71. I replaced my oil pressure sensor (PIA!) back in April. Truck has been fine. However, i have been taking it on trips to our hunting camp. After going about 80-90 miles up and down mountains, the pressure gauge eventually maxes out on the high side.One of the most serious issues that can happen to your Chevy Silverado 's engine is if it ends up with low oil pressure. Low oil pressure will cause the engine to seize up. When the oil pressure light on, it should be assumed that the engine locking up is imminent. We advise not running the engine until the issue can be properly diagnosed.Every now and then the oil pressure gauge drops to zero. It only happens for a few seconds, and engine RPM is not a factor. This morning the gauge bottomed out and the oil light came on (a first for the light). I'm thinking sending unit, as I've read on the 4.6/5.4 side that this is a common problem. The truck is a '99 F350 with 81,000 miles.Check the Voltage: A healthy battery should read around 12.6 volts. A reading below 12 volts might indicate a weak or failing battery. Consider Professional Testing: If unsure, many auto parts stores offer free battery testing, providing a more comprehensive evaluation. Evaluating the Alternator.2 posts · Joined 2018. #1 · Mar 1, 2018. I have a 1990 chevrolet Silverado with a 5.7 in it. Noticed that the oil pressure gauge will be a 30 psi, when first cranked up. Then after you run it a while it will drop to around 16psi. When I stop in gear it will drop down and the check gauges light will flicker , with the gauge showing around 10 ...Reaction score. 51. Location. Mississippi. ‘98 k2500 5.7 4x4: once the engine warms up, there are times when I’m completely stopped, in DRIVE, with the truck idling, and the oil pressure drops so low that the truck wants to stall. It doesn’t stall, but the engine starts to shudder enough to shake the cab. I’ll put it in neutral and the ...Comcast internet speeds (also known as Xfinity) depend on numerous factors, especially the router you're using, the health of your computer, congestion on the network and any physi...

white pages chicago illinoiscashland bellaire ohioaldis midwest cityking von autopsy results 2018 silverado oil pressure gauge fluctuations wmfd newswatch [email protected] & Mobile Support 1-888-750-3788 Domestic Sales 1-800-221-7829 International Sales 1-800-241-6421 Packages 1-800-800-4818 Representatives 1-800-323-6558 Assistance 1-404-209-5563. Aug 8, 2012 · 17 posts · Joined 2011. #6 · Aug 12, 2012. hey man your oil pump is attached to your belt so the faster your belt moves the faster the pump moves causeing the pressure to fluctuate along with the gauge. I had mine replaced a few years ago and i rarely make it past 40. Its common with trucks so dont worry about it.. lowes rocks and gravel Full Access Member. I believe there are other postings on this subject, but basically the oil pressure gauge will fluxuate as the strain on the engine adjusts to the driving conditions (i.e. the greater the rpms the more pressure). Mine personally will fluxuate between about 40 at idle to around 60 during acceleration.#1 · May 19, 2010. Hey guys, So about a week or 2 after I changed my oil, I have noticed something strange with my oil pressure. Whenever I start it up, the gauge jumps right … many an old sitcom mom crossword726 oda st davison mi 48423 247 posts · Joined 2010. #1 · Dec 17, 2016. 09 Sierra 5.3...I started it up last night at about 10:30PM it was like 21* out. The oil pressure maxed out at 80. I drove it 1 mile and it went to Zero. I heard no tapping or anything that would cause suspicion on actually have no oil pressure, so i drove it 20 miles to a gas station. monroe tire cheektowaga nystihl bg 85c parts New Customers Can Take an Extra 30% off. There are a wide variety of options. Attach the second mechanical oil pressure gauge to the J-21867-16 adapter. Pressure Readings. With the engine running, observe the pressure readings on both oil pressure gauges. The pressure readings should respond to changes in throttle position. GM states that with the engine running and the lower pressure gauge (at the oil filter adapter ...Make sure the oil indication is truly faulty, though. My experience is that a faulty gauge will not set off the "oil pressure low" indicator. If you have a dirty throttle body (how many miles do you have, and has it EVERY been cleaned), and your idle is fluctuating down to 300-400 RPM instead of the commanded 600, then the oil indicator is right, and you need to solve the erratic idle problem.Asked by dddavis3 Jul 03, 2019 at 06:49 PM about the 2016 Chevrolet Silverado 1500 LT Z71 Crew Cab 4WD. Question type: Maintenance & Repair. My oil pressure gauge just started fluctuating from about. 40 to 20.