Silverado Oil Catch Can - Did NOT Go According to Plan... 2020 Trail Boss Oil Separator 

I installed the JTL 3.0 on my 2019 Chevy Silverado K1500 RST 5.3L, and I was able to get rid of the air noise by using Self Sealing grey foam tubing 1/2 C 3/8" the one they use for the home air conditioners. I wrapped it with High Temperature insulation tape, and I have no vacuum noise or hissing noise, just the engine.

Have the same one! You need a larger diameter hose than stock to reduce the drag on the pcv system by adding additional length.

I just installed the catch can on my 2019 z71 and no hissing. Thank you for your videos. You have given me a lot of ideas for my truck.

You are so talented at making video's. Great channel. Just bought a trail boss and your video's help immensely. I went to Maui in 2004 alone and it was an amazing experience for me.

I have the exact same catch can on my 5.0 F150. Works great. I empty it onces every 3 months or so. It usually had about 2 Oz of oil in it. Definitely recommend for those with eco boost or similar. With the added pressure from the turbo the blow by is worse.

We will be making a trip to Disney from South TX in our 20 trailboss as well. Thank you for posting!!

2020 6.2, mine works great no hissing. First 6000 miles the can was almost full. Had gunk in the bottom 1/8 of the tank that looked like white lithium grease. Next 6000 miles it was only 1/3 full of gas and oil no gunk. I love it.

That down pour wouldn't stop 😂 I've been looking at the same can, but that hissing would get to me too. Keep the content coming. 👌

Weather variables can greatly change your MPG. Years ago when coming home from a trip we had a very strong tail wind. With five adults in my dad's Explorer we were getting about 27 MPG. About a third or the way home the wind turned into a even stronger head wind. For the rest of the way home we got less than 10 MPG.

There has to be a place to get a roll of the thick hose, cut it to length and install the JLT end fittings. ( your up close video shot showed a barbed type fitting connected to the hose) that would take care of the hissing noise. Maybe check for a GM part number in the pcv system. Once again, a great video. Been wanting to install this for a while. You have become my crash test subject for mods. 👍

I have one installed and it does NOT make that hissing noise. That noise isn’t supposed to be there. I think you need to force the female connector into the male connector. Don’t be gentle with it give it a good push. Mine didn’t seat correctly when I didn’t use a strong push. Then pull the hoses to make sure they’re not half-seated

Cool video. Sorry for your troubles fellow Texan. For your next mod, you might want to add a light under the hood. It's one of those mods you forget until you need it, but when you need it, you thank yourself endlessly. Also, speed has a huge effect on these trucks. On my 21 6.2, I lose (in round numbers) 1 mpg per 5 mph. She peaks at 24 mpg at 50 mph. By 85 mph (because, Texas is awesome!), she's down to 17 mpg. Which was the BEST mpg for a truck like this not that long ago. Yes, I could slow down and save money. But, getting home from west Texas by 11:30pm instead of 1am, after working all day, is a worthwhile trade.

I’m late to the party on this video (awesome channel btw) plenty of great idea have come to me from it for my 22’ RST. Tried clicking on the link in the description for the catch can site and it basically said I’m in danger. Anyway, great videos. Keep building!

Protip for those of you who live in a cold climate and install one of these. You'll want to empty them no longer than 1000 miles during the winter because you'll get condensation buildup like you wouldn't during the summer. I drained mine in warm months and only got normal oil out but back in february I drained mine and a lot of water came out with it.

Thank you for sharing your wisdom, brother. 🙏🏻

Rule number one, what can go wrong filming YT vids will go wrong. Good vid man, way to stick it through 👍🏼

Awesome video let's keep them Chevys rolling 🤙🏽🤙🏽

I have the JLT catch can on my '20 LT. I change my oil every 3500. Once you dump out the bad oil, let it sit overnight in a clear container and see it separate. BTW-I don't hear the noise from inside the cab so no issue.

Mines on my 2015 5.3 and it absolutely perfect!!!! , it collects oil and water vapor. I empty once a month and it's awesome....

I have a 2019 Silverado RST with the 5.3 V8, just got back from a trip from western NY to Springfield Mo. About 1050 miles each way. I drove about 10 mph over the limit the whole way, most of the way at 80 mph and averaged 21.5 per gallon.

there are centrifugal ones built into the L5P and the LM2 (6.6 and 3.0 duramax respectively). They spin the oil out of the air, and return them to the crankcase .

Thank you because this video is exactly why I went with UPR’s Catch Can. They have Continental hoses and their can design is way better. They also have an interchangeable PCV valve as well that will allow you to go with a slightly larger jet size for better Vacum from your crankcase so that the overall system could flow better because adding a catch can restricts the way your system would normally flow when it’s stock.

I have the jlt on my 2016 Silverado and it doesn't make any hissing noises.the fittings were hard to push on mine.been almost 2 years since I installed mine.i drilled and tapped the bottom and ran a hose and a ball valve into the wheel well so I can drain it easy.i drain mine every week or 2

That tunnel was in mobile! Destine is an awesome place to go with the family.

I got one for my ‘17 Silverado 5.3L. I had to add a little lubricant to the little seals inside the line fittings and the seal on the catch can

I have the same catch can on my 2020 trail boss and none of that noise. I will say that I have big hand and had a hell of a time getting that back hose clicked in good.

Awesome video! Also, your mpg probably went down because of a vacuum leak and the engine not running at its peak performance due to that leak. Try putting Teflon tape around the threads on the can then screw it back in tightly. Also add some hose clamps at the fittings.

I have the same catch can on a 2021 6.2 , and I do not have any vacuum leak noise in my engine.. I think your first diagnoses was accurate, you have a broken seal in one of your hoses. I will say I have about 3,000 on my catch can, thus far no problem ..for my recommendation I would exchange yours with a new one.

You have to be careful. The noise could be caused by excessive pressure. The catch can may be increase the pressure in the PVC system. The PVC needs to evaluate air as fast as possible and with a catch can this can be more restrictive causing increased crank case pressure and this could explain the lower fuel economy. I installed one on my 4Runner and MPG dropped 2 mpg. Took it off and it’s back to normal. The manufacturers didn’t put one on because they don’t really need it unless you have direct injection.

I have a July catch can on my 18 and no issue. It did not have the fitting, it had steel hose clamps if I remember correctly. I have to dump it less in the summer... Pretty much all oil. Winter gives you the creamy latte

Just bought a 2021 trail boss and already put 1200 miles on it

I do know that the duramax diesels come with a separator. It doesn't make since that the gas engines don't have anything. Also that hissing noise is definitely an air leak. I recommend getting a new connection. It is just placing a vacuum on the crankcase, it shouldn't be that much flow. The reason you saw a reduction in fuel mileage is because pcv goes in after the MAF sensor. So if you are sucking a lot of air it will throw off the actually air fuel ratio that the truck thinks it should be producing. Thanks for the content.

Great Video 👍

Install mines this weekend on my 2019 GMC Sierra 1500

I have the same set up as you. JLT catch can, Muffle delete, and the CAI intake. The catch can on my 2021 sierra 5.3l does the same hissing sound and catches a ton of crap. I put the catch can on at 1200 miles and the dealership hasn't said anything about it. I now have about 5k miles on the truck. I noticed in the colder weather it will catch water from condensation(yellow goop). If you could give an update about what JLT says about the hissing, that would be awesome! Thank you for the great content!

I put a catch can on my silverado and it's a no brainer if you plan on keeping your truck to install a can on it. You could remove the OE insulation and put it on the catch can hoses.

Happy birthday hawaiian

Finally got my 2021 Trail Boss LT 6.2L yesterday! It moves SO easy! My first time merging onto the interstate I had to let off the gas pedal half way down the onramp. Seriously hit 80mph before the end of the on ramp without realizing it. That said though, with the BBQ grill sized muffler and the resonators out back it sounds like a minivan. Can't wait to get my Borla muffler put on.

I have a couple of JLT (now J&L) catch cans, I empty them at each oil change. My 3.5 Ecoboost usually has about an ounce of oil in the can between changes, my Tahoe since it's not boosted isn't as bad. J&L actually has a video about the hissing noise that they now send a link to when you buy one for a GM vehicle. Obviously GM knew they had a serious noise issue to put that much insulation around the PCV hose, and that one is what, maybe a foot long? Now you've got 3+ feet of non-insulated hose. The Ecoboost was one of the first DI engines to start having serious issues with oil residue from the PCV coking up the back of the intake valves. A Ford mechanic recommended the catch can when my truck was new in 2018.

I am running a larger can. Which meant it had to be installed on the frame. It is 4" in diameter and 7" in high it has a low restriction baffle at the inlet port and a slightly pulled-apart SS pot scrubbing pad(making a looser weave to keep a more open flow of gasses etc..) at the exit port with 1" ID flex hoses to and from the can. Making much less flow restriction. It also has a 3/8" ball valve on the bottom of the can to allow easy draining. However, I don't believe this was any of your problems with that vacuum leak. I have just created a larger in-catchment area to give the gasses and gunk a larger😮 area to slow down and collect. This resembles an external catch-can system I found on a marine engine.

Great video, thank you!!

I have the same JLT catch can on my 19 Silverado(new body), and have put around 4,500 miles on it without issues so far!

I just installed mine yesterday and did notice a lil increase in vacuum noise(hissing) with the hood open, but not with the hood closed. I ordered some foam beer can insulators to quiet the catch can. Not that i need to but more of an experiment. 🤔 also added some oil to the inside of the hoses o-rings with a q-tip.

If I get one of these, I’ll cut off the connectors, add some foam insulation over the hoses and clamp em down. Hopefully that’ll help

Got myself a 2019 Trail Boss LT luv it now has about 11,500 in the almost 2yrs I've had him

Thanks COOP ...

IMO: manufacturer’s know most owners do not follow regular maintenance intervals. Most don’t even check their oil and rely on a lube shop or mechanic. They assume owners wouldn’t dump the catch cans. Rather than add money adding them and potentially have owners blame them for engine failure or issues in the vacuum, they accept the issues present in the current set ups. My opinion but I turned wrenches on vehicles for the military for over 21 years. Wild how many people would hop in and fire up vehicles without checking anything, which their manuals said to do before they started their vehicle.

I agree that any engine with direct injection, turbos, etc. should ideally come with a catch can from the factory. The problem is that many drivers don't know anything at all about vehicle maintenance. The average car owner would not understand the purpose of a catch can or know to empty it periodically, so the manufacturers don't bother to use them. Also, the overall economy of today is dependent on planned obsolescence. Car makers have a financial incentive to design cars so that they will be reliable only as long as the factory warranty is good for. After that, they hope that major failures happen so people will just buy another vehicle rather than spend thousands on repair bills.

God bless you and your family bro

great videos... even 3 years later.

I had same hissing when I used the fitting on it, I just cut the fitting off and used hose clamps onto the nipples of the PCV

Mpg issues might be that the circulating air travels a lil bit more? And the ecu need a lil bit of driving around to “calibrate”?

We out here!

UPR catch cans come with much better hoses as well as WOT hose. I have a 2015 Yukon 6.2 with no added noise. (Pro model with ceramic back flow valves $439).

I have a 19 TB and installed the JLT in 21. My first thought was not getting the hose fully seated. Mine were both tight to seat (click on). I never did get the louder hiss. I empty my can every 2500 and average about 1/3-1/2 full

I out this on my 21 5.3 trail boss and I have no hissing. I have had it on for about 12k miles for the last year and a half. I put it on at about 600 miles.

Hell yeah I'm putting a dorman brand on my 2012 chevy malibu with a 2.4 ecotec I've got a K&N air filter in the stock air box and resonator removed with a cone K&N air filter so I'm running 2 total air filters I'm hoping I'll get a little more sound yet from my set up looking forward to my install peace and much respect to you 👍 JASON

Run a slice line down the stock part insulation to be able to remove it to use it around the new catch can hoses then wrap the insulation tape around that I may be super quiet just a thought

I have a 2021 Sierra AT4 and I just noticed the hiss too! Pretty annoying, I'm going to try a high temp thread tape on the threads of the catch can to see if that helps

Just get a breather oil cap. Had the same issue when I owned a Sky Redline and installed a catch can with AN fittings and braided hose.

Interesting. My 2005 Chevy trailblazer 5.3L EXT LT came with a cold air intake filter. Just hidden under a cover shroud. I typically take that shroud out during the summer. I do kind of like the direction change of your setup. Not gonna pay all that for what you have but I like fabricating so there is that..

I have a 2020 Trailboss 6.2 with the same catch can. Mine never has hissed. 12k miles.

I see you drove through the mobile tunnel, I live in daphne which is the town just passed the bridge

Come down to the ocala forest and go off road. Put the z71 to use like I do in my 08 Silverado. Big fan here in Eustis, FL

I’m thinking it was not quite tight at the connector during the original installation, but you got it on the reinstall. But I could be wrong.

I’m following you from Saudi Arabia 🇸🇦. You make very, useful and entertaining videos. I own a car like yours - Chevrolet Silverado Trail Boss 2020 Black color.

I have this on my 5.3 and don’t notice any noise Plus I get about 2 mpg more hwy. to be honest your first clip sounded like it was not clipped in fully.

3: am is not the time anyone wants to playing around with such problems ha ha ha!!

Hauoli la hanau Bradah Chad!🤙🏽🤙🏽🤙🏽

We went to Okaloosa FL. Awesome time! If you ever have a chance to go eat at Jimmy Buffett you won't be disappointed 👍

Sounds like the fitting is leaking with the hose. One of those things. Mine did something similar

Try the insulation cover for fuel and transmission hoses

Would appreciate if you could do one video where you go over reliability of new Chevy 5.3 and 6.2 engines. I am interested in Chevy Tahoe but am hesitant to pull the trigger due to Lifter issues all over forums. Thanks.

Couldnt you either dip the can in high temp foam or even possibly rhino line (bed liner of choice) the can

Totally agree that catch cans should be stock on direct injection only engines. Which cold air intake did you use? Looks nice. I didn't know those engines use 0W-20 oil, yikes.

spray some starting fluid, around all the fittings and listen for an engine speed increase?

It's a great investment. No regrets....

Looking to install the catch can on my 21 Trail Boss. I have the extended warranty and will that effect the warranty?

When running a closed catch can like you did here, you're supposed to still use the PCV valve the engine normally uses. When you connected you said you connected a line from the can to the valve cover, I don't recall you connecting it to the PCV valve.... Without the PCV valve, way to much air will flow. PCV valve meters the airflow. It will act like a vacuum leak without it. If you did in fact use the PCV valve, them obviously there was an air leak elsewhere in the system. But if it's sealed up tight, these kinds of setups work awesome on any engine with a closed loop PCV system. Thanks for the video!

I have the same catch cam on my 2020 Trailboss. It does not hiss at all. I really think the fitting coming off the valve cover is bad.

The hissing is the turbulence of air rushing through the hoses.

Lonestar, I did a little research (google) and found a thread on this issue but with a different brand. Quote " Re: Sucking noise with catch can installation. Postby MWBARN1 » Jan 05 2021, 11:52pm I had this same issue with my E2000 Catch can. It would very slightly affect idle to the point of me not being sure if it was in my head or not and there would be a hissing sound from the engine bay when running. I couldn't let it alone so I took the catch can off the truck, put the stock PCV tube back on and there was no more hissing. I then took the catch can assembly and bench tested it with a vacuum pump. It would not hold a steady vacuum and would leak from 20 inches of mercury down to zero within five seconds. I isolated the leak to the quick connects provided with the E2000 kit. I cut apart the factory PCV tube and took the connectors from it and installed them on the E2000. I re-taped the hoses where I replaced the fittings and bench tested it again. This time it held 25 inches of mercury for five minutes. I called it good and released the vacuum. After re-installing the catch can there was no hissing sound with the truck running. Hopefully this helps others with this same issue.

I've got the JTL on my 2023 Nissan Frontier haven't notice in difference in fuel economy. Sure does catch a lot of oil, water and other muck more so in winter

So is this really a necessary mod for my 2023 Silverado? I’ve read some issues on Silverado and this was one of the solutions.

Do I need to unplug my negative terminal on my battery before I install this?

I put mine on today and I have the hiss as well. Sounds like vacuum leak. I thinking it’s because the hoses are so long and air going through a hollow can. The stock line is short and sweet.

Have you found the answer yet? I've been looking into the Colorado ZR2 Diesel or the Silverado like yours and it sucks to even have this kind of issue off these brand new vehicles.

I was a diesel mechanic up North for 35 years and I saw a few of them catch on fire because they would be clogged, I personally would clean them and replace the filter every time I did an oil change, it would take a few minutes to do the right thing.

My guess is there is still a slight vacuum leak. It's extremely possible that the o ring on the jlt fitting is missing, damaged or even the wrong one.

did you remove the PCV valve and replace it with the catch-can; I don't know if it is wise to substitute the PCV valve for the catch-can, I installed a catch-can on my dodge ram van, but I left the PCV in place

Had the same noise issue after installing my unit. Changed the upper pulley and main belt. Noise gone.

What exhaust system do you have ? Sounds awesome

Looks like JTL just put out a video addressing the hissing. Longer hose more hiss.

Ford has a oil separator on newer ecoboosts before the pcv that returns some of that oil back to the pan.

What is the inside and outside diameter of the hose that is used in your application? What is the stock hose inside and outside diameter of the hose? I have purchased a Mishimoto Catch Can for my 2.7L Silverado. It has an inside diameter of 1/2” and an outside diameter of 13/16”. Is that thick enough to limit the sound that you were getting with your installation. I was thinking of maybe getting insulation wrap that is used for hot water pipes to install over the hose to limit how much sound is heard from the air rushing through the tubing. Please reply with your opinion. Thanks.

I have a 2020 1500 custom does your oil filler neck move at all? Front to back? I have the elite engineering catch can and their bracket puts the can right in the way of the oil filler neck but the filler neck can move with a bit of effort.

I just added this catch can to my 2022 6.2L Trail Boss LTD. Mine has the hissing to but you can only hear it with the hood popped. Not too bad. I just want to confirm that you have determined it is not a vacuum leak and lowered your mileage and that first drive was a fluke?

I love the truck but what cold air system do you have

Can this void the factory warranty?

i got a j&l osc and didnt get a hissing noise. Mine works great!