GM High Pressure Fuel Pump Replacement 5.3 & 6.2 ( Complete Guide)

[@pmurphy12667]

I do all my own work and use youtube for rare jobs and let me tell you Aaron, your videos are top notch and some of the best on youtube. Well done!!

[@jr75848]

Asked at the dealership for information about an issue I was having and they said it's a good possibility that it's the HPFP that was going bad, and may need replacing. Well, so they want almost $200 just to "diagnose" the issue. I typically prefer to do as much work on my vehicles as possible, but after speaking to them it seemed like that would not be possible in this case. After watching your video, I'm more confident that I'd be able to get this done myself and not have to deal with them. Thank you for the informative video. Keep up the great work. I hadn't run across your channel before. But, you earned a Subscriber from this video alone.

[@stanhill2284]

Thank you, Aaron, your videos, show good clarity and good description and details. No skips at all your video Deserves a five star ratings thank you.😊

[@michaelbrady4208]

Great video! Just did the HPFP in my wife’s Yukon. Having the 90 impact ratchet makes a world of difference. Also, the install plug is great, I didn’t buy it, you can look down in #1 intake port and see the intake valve, and turn the motor til you get to valve overlap, then you know you’re TDC on exhaust stroke.

[@movhs2995]

Great video man I’ve seen many of these videos about changing the high-pressure fuel pump in yours is by far the best

[@AaronHinesAuto]

Thank you very much!

[@soleslayer91]

​@AaronHinesAuto would I see a little over heating at idle if this was the problem?

[@johnshaw7339]

In the video you mentioned you would post a link to the pattern for tightening the bolts on the manifold cover. I don't see the link. Is there a source for this? Thanks!

[@cperez1320]

Changing mine tomorrow wish me luck

[@AcidGambit419]

What happens if you install the pump without lowering the camshaft?

[@buggydude12]

Very nice! I'm actually going to change mine this weekend. I have the same issue!

[@PK-di4vu]

The fuel pump you’re recommending is unavailable everywhere. Do you have another recommendation?

[@majordog85]

Thanks man you got yourself a new subscriber 🎉

[@mingwon2009]

Hello. I am doing car maintenance in Korea. I was impressed by your video. Could you tell me how to get a plug to check the cam position before replacing the high pressure pump? It's hard to find just the number on the plug. Can you help me?

[@discuswithdavis]

Super helpful. Thank you for putting lots of details. This guided me through a 2020 Silverado.

[@ismaelreyes4732]

I have a question I disconnect the fuel pump fuse and my truck still running I been waiting for 30 and still going any ideas?

[@aaronrodriguez3958]

Where can I find a pump at? Came across your video and can't find one online or local dealer.

[@CrockerLogic]

Get a set of crows feet and you can put torque wrench 90° to the crows foot. It's important to get this right.

[@cashlessracing]

Does the 2008 escalade 6.2 have this?

[@djsuretay1]

Thanks this is what’s happening now with my 2015 Yukon sle. The problem I’m having is that I have to add oil down the road after a fresh oil change and I’m getting p0172 and p0175 codes is this a hard project to do on my own

[@suprastargte]

Did used the tool but still won’t fire up everything at specs. Could it be a lot air in the system

[@darrentodd7440]

Nice video. Get a set of "Crow's feet" attachments for your torque wrench to measure wrench torque.

[@formulavr6]

Hey man, great vid. Do you know why gm asks that no. 1 needs to be on tdc (exhaust) for the install? It rides on a cam follower that isnt really timed to the pump in any way?

[@twofast4nu]

Great video! I'm wondering if the ticking noise I'm hearing is actually the HPFP. I also have the rich codes and dieseling on occasion.....

[@Timekeeper-fr7wt]

Got the opposite issue we got lean banks, carmax got a code for fuel injectors

[@salserr5022]

Great video, where did you get that tool for the pump?

[@majordog85]

Hey my friend, I have a question. Did you ever get a U18A2 code afther you finished with the job and started the car? I'm getting that code and I do know why. Also seems like I can't erase it.

[@shaukatnawaz1909]

Great video simple clear instructions to the point

[@danieldominguez4760]

How do you remove the electrical connector to the pump on the left side?

[@gregcurt72]

I get the P0090 code ever time it rains, I can clear the code and it runs fine. Took to GM dealership and the insisted the high pressure pump was bad. Right now I’m at $1500 ac pump replacement and reassembly. I keep seeing other included in this thread are see this come back it’s due to the harness?

[@Anvita444]

2019 Silverado 5.3. Anyone know where the valve is to check fuel pressure? Thanks

[@user-jq9gd8ec9z]

Is techron can damage that high pressure fuel pamp?If yes what will be symptoms.Thank you in advsnce

[@zakudog]

It’s crazy you said this cause I used chevron fuel for about two days and my Tahoe started throwing fuel pump performance codes and stalling. I’ve put some Seafoam in the tank and have been watching the pressure with my gauge so far no issues but this happens right after I washed the truck weird

[@kurtlarson2493]

Great video, how long did this take you from start to finish? Thank You

[@rgvcateye9058]

Whats that ticking sound all these trucks have? Is it the hpfp? Sounds like a sewing machine.

[@Chucktales]

Injectors, direct injectors are loud

[@supremecanadian6815]

@@Chucktalesbullshit lol it’s lifters.

[@Chucktales]

@@supremecanadian6815 sewing machine sound is injectors.

[@supremecanadian6815]

@@Chucktales yeah? What do you think makes the click? It’s the hydraulic lifters bud it’s a known fact. People afraid to admit their chev ticks excuse is always oh it’s the water pump or oh it’s the fuel injection lol. I own a 5.3 I just don’t make up bullshit.

[@Chucktales]

@@supremecanadian6815 I’m not sure of your knowledge on how direct injectors actually function but the components inside also make a “click” sound. It doesn’t have to be only metal on metal to make this sound. Why were old diesels so loud? The injectors….now they are much quieter, diesel engine and GDI engines, which is the engine in the video use direct injectors which are louder then normal injectors. I don’t make up bull shit son. You have a glorious absence of recent automotive knowledge if you think only lifters can make that sound. Get with the times.

[@jphalan]

hey Aaron, I have a 2017 GMC 1500 6.2 and my truck constantly goes into limp mode when it rains. Then the other day it is now permanently in limp mode. Im down in the Yucatan Peninsula and there isnt much help, so its basically a do it yourself scenario. We found that the High Pressure pump was bad, so we changed it out, really not knowing what we were doing, and the guys did not put the number 1 piston on TDC. Im having them remove it, and placing piston 1 on TDC as you suggest since we do not have the guid tool available. We only ran the motor for several minutes, we are getting 80psi on the low pressure side and only about 85 on the High pressure side. So Im assuming it might be the incorrect installation? I was reading that the plunger can get damaged over time do to lack of oil changes, I bought this truck used, so who knows, but do you know if we can change out the CAM plunger if it ends up that it was damaged? I still need to figure out why it goes into limp mode when it rains...thats like trying to pin down the location of a bad smell..lol Hoping you might be able to help! Cheers.

[@dragstang86]

You ever figure this issue out? I'm having a similar problem.

[@jphalan]

@@dragstang86 yes, it was an issue with the wire harness in the engine compartment next to the cowl. Had to have it replaced.

[@gregcurt72]

Same issue dealer insisted on changing the pump, $1500.00 the code was P0090 so I think it’s wires not the pump. Do you have part number for the parts you used to fix?

[@ceebfwmmuas1114]

Thanks Buddy! Just got a code for that same problem.

[@MD-tg1iz]

Does it matter if tdc is on intake or exhaust stroke?

[@Andyandcars]

It should because it’s a 2 th 1 ratio . Cam to crank . I don’t see why it would matter because it gets compressed every cam rotation anyway

[@samwalton5780]

Would this be the same procedure for a ‘21 5.3 Trail Boss Custom? Thanks for the video btw, very thorough and informative.

[@raygaither9369]

Great video!!! How can you relive fuel pressure if the engine won't start?

[@djsuretay1]

Hey what’s the worse problem if this isn’t replaced

[@TheOfficialWickedOne]

Would a fuel leak down test work as well?

[@soleslayer91]

Why are there so many part #s for this?

[@djsuretay1]

Did you reinstall the clips in the back

[@jbmanning]

I have a 2014 5.3L with the same behavior and codes. Looks like this is in my future. Any idea what a GM dealer would charge for this?

[@joshfraser6705]

$1,100 was the quote I got from dealer. That includes diagnostic fee ($130) and oils change ($69.99)

[@jbmanning]

@@joshfraser6705 thanks for the update. Timely though because yesterday a woman t-boned my truck when she ran her red light and I think the thing is totaled.

[@joshfraser6705]

@@jbmanning sorry to hear that- I just finished installing the pump wasn’t too bad at all.

[@KingEbby]

Anyone know if the 5.3 and 6.2 have the same rating psi wise.

[@jeremefolkening4073]

I recommend getting some crows feet to due the torque properly on that pipe. Also did you use clean motor oil on the intake gaskets? Priming the line I think should be about three key turns without starting

[@mijohnst]

I just did the job and improperly torqued these down by not holding the crow's foot at 90 degrees. I thought they were at 22 ft-lbs, but after smelling gas, I had to take off the intake again. I found that I had really torqued them to about 15-18. Properly using the crow's foot, I got about 1/4 of an extra turn, and my leak stopped.

[@kennyb8831]

Hello Aaron, thank you for the video. Do you know if the 4.3 HPFP is in the same location? Thank you.

[@Gr3eNbEr3tSn1pR24]

How do you verify all the gaskets lined up perfectly? Lol that would drive me crazy putting that on

[@kkc1577]

Awesome video! I need help. I am getting a steady 45 psi on my car 2011 suburban 5.3. I feel like its dumping fuel because my fuel gauge goes down more than normal. I see everyone else mention 50 to 60 at the rails but i am using my expensive x431 scan tool to check everything. All of a sudden after 1 month of using e85 its been extremely bad. Fuel gauge drops fast. I cant find no wet fuel leaks by the engine compartment. My mpg normal at 15 to 18. Now feels like 6. I am also using a scan gauge to read the mpgs and its not bad hwy is 18mpg both dash and scan gaugeii. What the hell is there a small leak some where only when its on?

[@ldixon4548]

Gas prices?😅

[@sergeytollenaar1268]

QUESTION: So, are there any other wires/plugs or hoses attached to the intake manifold?? or just a few bolts that hold it down? Asking, since I have 2021 5.3 Sierra with extremely similar configuration under the hood.

[@juanrrobledo89]

The plu wires do not attach to the manifold cover, it's to plug and coil pack

[@capitaldd3693]

What is the psi of the high pressure fuel pump...? Thanks - great video

[@YetAnotherLoser]

thanks for the video! fyi, the link to the fuel line disconnect tool is currently unavailable. assuming affiliate links are part of your compensation, it might be worthwhile to update. thanks again, this was a very good and helpful video!

[@djsuretay1]

Where did you get the fuel pump from

[@jisuson4647]

How to rotate crankshaft? Which mm of harmonic balancer bolt ? 24mm 27mm 30mm 32mm ?

[@JoseRamirez-yh2ll]

Quit being fckn lazy and check for yourself

[@hillbilly7432]

Awesome thank you !

[@soleslayer91]

I can't find this pump anywhere!😢

[@raydavis5783]

I'm assuming you checked for leaks before reassembly. Just an observation, great video.

[@navidvasseghi6284]

What's the best way to check for leaks?

[@tyalbert5063]

@@navidvasseghi6284 run it

[@soleslayer91]

Can you start the vehicle with the air intake manifold off so you can look for leaks?

[@GS-rr1rz]

@Aaron where is your garage

[@michaelkline9510]

Great video aaron! I like the detail you went into,should this fuel pump be changed when you hit 150k to avoid gasoline ending up in the crankcase?

[@lichking3711]

imo no, just look out for stumbling as it starts to lose pressure and check your oil periodically. Gasoline contamination will give it a different smell and yes, it will be overfilled even if you filled it correctly last service. Oil doesn't magically appear so unless someone added oil for some reason, an overfilled engine will mean gasoline dilution. Don't delay the repair either, oil mixed with gas will not provide enough lubrication and the wear on the crank, rods, cam will be accelerated.

[@soleslayer91]

Anyone tell me if a 2015 gmc sierra 1500 slt 5.3l flex fuel the same pump number? Noone seems to know

[@movhs2995]

Great video

[@jeffl4945]

Yikes that little 6710 is expensive. Can't I just use a dial gauge and stand to figure out when the cam lobe is located at the base circle (= lowest point)? Do I also need to figure out if the #1 piston is at TDC/exhaust stroke, or is the cam lobe being at the base circle position sufficient?

[@lichking3711]

cam lobe's position should be enough but cyl 1 tdc is the sure way. As I understand, it's just so there is no extreme spring pressure preventing the pump from seating properly - it has a machined surface and a metal gasket after all.

[@jthemixer]

I just did this job. (2hrs) I removed the #1 spark plug, then I set the old fuel pump in place. Turned the crank until the #1 piston came to TDC and watched the fuel pump drop to its lowest point. The intake valve which you can see down in the port was closed so I bolted it down evenly from side to side and then torqued it to specs. Done! Hope that helps.@@lichking3711

[@ceedeeupholstery4462]

Excellent video...

[@godfatherthv]

Hello Aaron, I have a 2012 Sierra 6.2l that just starting to have trouble starting. It will start up after a hard start and starts normal after I run it. My research says its the fuel pressure regulator. I cant find this part but did see that the regulator could be part of the fuel pump??? Do you know if this is true? Thank you

[@Jaysauceda]

Hey. Chris lujan. I have 6.2 as well it having a hard time starting takes a couple of tries to turn on. After I turn it on no issues. I’m either thinking it’s running out of fuel or bad. Fuel pump

[@lichking3711]

on this generation of SBC the high pressure fuel pump has a regulator integrated into it, it's the little cylinder with a 2 or 3 wire plug to it. Controls the fuel rail pressure and it can also go bad but I would do it as a unit - regulator and pump. Not sure if the regulator would even be listed separately.

[@tommyChevelle]

I did this and it didn’t change my situation. I’m wondering if my o2 sensors are bad .

[@CharlieBam]

1 year later but I'm pretty sure a good way to check for that is if fuel has leaked into your oil or not. If no fuel in oil, it's prob not the hpfp

[@cperez1320]

How would I tell if my piston is all the way up

[@michaelbrady4208]

Here’s an old school way. With the intake off, pull #1 spark plug, put a screw driver in the spark plug hole, then turn the motor off the crank bolt til you feel the piston hit the screwdriver and push it up. You’ll hear air being pushed out of the hole if you’re on the compression stroke. If the piston is going up and you hear no air being pushed out, then you’re on exhaust stroke.

[@michaelbrady4208]

Then look down in the intake port, you can see the valve from behind its seat, slowly turn the motor until you see the intake valve BARELY crack open or move, when it BARELY moves, you’re at “valve overlap” when both intake and exhaust valves are both barely opened, and that’s TDC.

[@michaelbrady4208]

Also, if you can’t hear air escaping, plug the spark plug hole with your finger and slowly turn the motor by hand, you’ll feel pressure against your finger if it’s on the compression stroke, then you know you need to come all the way up and then back down, then next time going Up you’ll be on the exhaust stroke.

[@basicallybangbang]

shouldve watched this video before doing my sierra 1500, I broke one of the manifold cover bolts trying to tighten it to 88 pound feet of torque :( spent 4 hours getting the broken part of the bolt from inside the block

[@silvac196]

88 pound-feet!!!!!! you got mistaken with inch-pounds

[@gabrielvazquez9585]

Life saver 👌🏻

[@WingsAA]

Great write-up. How was your HPFP packaged when you received it? Reason I'm asking, I purchased a "new" hpfp and when it arrived the packaged appeared to have been opened and taped. The pump was in a clear bag with a zip tie and then wrapped in brown paper and bubble wrap inside the AC Delco box. The pump look overall new however the bolts are questionable and I could tell there was some fluid coming out of the fitting ends. Wasn't sure if they prime them or test when made. I may return and get via the link you provided but was just curious on those question.

[@AcidGambit419]

Why would you ask this question to a KZbinr and not the store you bought it from

[@WingsAA]

​@@AcidGambit419 why does a dog lick itself

[@movhs2995]

How many fuel pumps does this vehicle have

[@rgvcateye9058]

2. The low pressure fuel pump in the gas tank and the high pressure fuel pump in this video.

[@danielmeraz1628]

Hey aaron my 2014 sierra 5.3 is displaying service stabilitrak and abs on the dash. Any input on how to fix it? And just recently service brake assist just turned on as well

[@philipthomas7066]

Probably the sensors on your calibers

[@djsuretay1]

By the way great video

[@Channel0002]

Great 👍 video! What do you think a dealer would charge for this repair? Parts and labor

[@michaelbrady4208]

$1150, I laughed at my local dealership then did my own. Took less than 2 hours and that was with 15 min of show and tell with the wife as to valves, TDC, and what the 4 strokes look like

[@ryanreyes1710]

My hero

[@Buffy-ip4io]

You used the open-end of the wrench backwards.

[@Buffy-ip4io]

Used it right 13 min in on reinstall 👍

[@PhillyDee215]

Cool video 😎 i haven't had a chance to work on a direct injection 5.3L or 6.2L LS yet😔

[@slycarlo8747]

*LT they’re no longer an LS

[@PhillyDee215]

@@slycarlo8747 yeah I just wish they never went direct injection🙄

[@slycarlo8747]

@@PhillyDee215 Same but there are quite a few more advantages to the LT block compared to the LS, Motion Raceworks has direct injection plugs to pair with port injection to do away with all that if you’re doing a swap.

[@PhillyDee215]

@@slycarlo8747 yeah that port injection definitely helps tho👌but they just ruined the push rod engines🙄funny thing is that I've replaced countless direct injection pumps/secondary high flow fuel pumps its not even funny. In fact I have videos on some of them. New is not always better, it's a fuel system waiting to fail😯

[@MrBobjorge]

My pump is leaking at 60,000 miles. Screw AC Delco. Im not paying there price on a part that just made it 60,000 miles. I'm going aftermarket and take my chances.

[@youzen8606]

hi Aaron, i have code p00c6 and strong smell of gasoline

[@RandyWhitworth]

It's a injection pump the fuel pump is in the tank

[@futuristicfool2375]

Thanks for showing how to use disconnect tool 👎🏻

[@johnpatillo5203]

Gen 5 are trash removing an engine to replace timing chain

[@antonioavila8818]

18 what

[@alexdeleon7153]

P