Engine Tick - 2015 GMC Sierra 5.3

Miallterain18 · March 17, 2018

1 minute ago, MOhunter92 said:

What’s the pic it hasn’t shown up

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https://static.nhtsa.gov/odi/tsbs/2016/SB-10078567-7690.pdf

This is the link to the pic

MOhunter92 · March 17, 2018

It's a service bulletin for a collapsed valve in the afm cylinder that leads to the tick. This link should take you there.

https://static.nhtsa.gov/odi/tsbs/2016/SB-10078567-7690.pdf

Dude.. this could totally be the answer. That’s a lot of work!

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Miallterain18 · March 17, 2018

1 minute ago, MOhunter92 said:

Dude.. this could totally be the answer. That’s a lot of work!

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I hope it is for all of you, if so I have no clue what is going on with mine and I am quite upset since a three month old truck with a sticker north of 56k and not even 8500 miles. I would be concerned with all the trucks and the vast mileage range this is popping up at, it could be some bring it back in ever 10-50 thousand miles for the same issue and just wait till it happens again out of warranty. $$$$$$$$

tobinstetson · March 17, 2018

Mines been happening since month 8 of ownership. I’ve had all my AFM collapsible lifters replaced. Sorry guys but it didn’t change a thing.

i have 70,000km on it now and it’s 2.5 years old. It’ll be driven til it’s sold like this. It’s not worth wasting anymore time.

15 Z71 · March 17, 2018

It crazy to me how you hear about this on here all the time. I know 4 people with these trucks with lots of miles,all stock and 0 issues.

Spastik Monkey · March 17, 2018

When I get it back, I'll report my findings. When it gets out of warranty, I intend to do a cam and a true DOD/AFM delete. I'll report on that too

PackerChev · March 21, 2018

I just stumbled across a response that seems like there could be some logic to...

After numerous rides to the dealer and talking to several techs, one answer finally made sense. The valve package of the transmission is located on the drivers side. These 6-speeds are super smart, and when the truck is under lightacceleration, in a high gear like 6th, basically lugging, the transmission starts to preload the gears for optimal gearsection. You can hear right before the shift the clicking of the solenoid valves in the transmission. It is completely normal.

I've always thought that there seemed to be a correlation between the ticking and the tranny. It seems like it’s in the drivetrain and not so much the motor because it doesn’t do it when you rev the engine and it directly correlates with the RPMs.

MOhunter92 · March 21, 2018

I just stumbled across a response that seems like there could be some logic to...

After numerous rides to the dealer and talking to several techs, one answer finally made sense. The valve package of the transmission is located on the drivers side. These 6-speeds are super smart, and when the truck is under lightacceleration, in a high gear like 6th, basically lugging, the transmission starts to preload the gears for optimal gearsection. You can hear right before the shift the clicking of the solenoid valves in the transmission. It is completely normal.

I've always thought that there seemed to be a correlation between the ticking and the tranny. It seems like it’s in the drivetrain and not so much the motor because it doesn’t do it when you rev the engine and it directly correlates with the RPMs.

Very interesting.. my transmission makes a weird sound if I give it gas as it’s down shifting between 2-1, it’s not a clunky sound it’s a weird frog kind of sound, hard to explain. Mine is a 5.3 8 speed but it definitely makes a weird noise. Also makes sense that bumps effect it making noise or not. Also never makes a tick sound during idle, only in drive

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DPetry94 · March 21, 2018

Mines been happening since month 8 of ownership. I’ve had all my AFM collapsible lifters replaced. Sorry guys but it didn’t change a thing.
i have 70,000km on it now and it’s 2.5 years old. It’ll be driven til it’s sold like this. It’s not worth wasting anymore time.

That's the decision I came to also, my truck runs fine. Just has the annoying tick, but as long as it keeps running good I'm just gonna drive it until I trade it in.

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Miallterain18 · March 23, 2018

Well I got the truck back today and they claimed nothing was wrong just an extra half a quart of oil no gas smell.... The two techs that diagnosed and originally took it in ran away and didn't come out till I was leaving, they changed the oil and said bring it back in a thousand miles and they will look it over again. The lady tried to tell me gas and oil also smell the same..... they brushed me off like nothing. Awesome to see how amazing GM customer service is.

Spastik Monkey · April 2, 2018

Welp, new cylinder head is on. It still makes the ticking. The dealer tried to blame it on the small exhaust leak I have with the car back I have. I’m fixing that today and then the service manager and I are going to do a drive together.

javierh41 · April 4, 2018

On 6/20/2016 at 9:52 AM, GMCustomerService said:

Good morning ct_corey and 2016LTCC,

I am sorry to hear you are experiencing these noise concerns in your trucks. I recognize that you are looking to other forum members to see if they have found a resolutions for similar concerns. However, if you wish to visit a dealership to have this looked at please feel free to private message me with more details.

All the best,

Julianne M.

GM Customer Care

Julianne, I have the same issue, i thought it was an exhaust leak and the dealer agreed, they replace the caskets between the manifold and the cat converter on both sides, (classic chevy Beaumont) this did not fix the issue. what do you suggest .

MOhunter92 · April 4, 2018

Julianne, I have the same issue, i thought it was an exhaust leak and the dealer agreed, they replace the caskets between the manifold and the cat converter on both sides, (classic chevy Beaumont) this did not fix the issue. what do you suggest .

Starting to think packerchev is on to something and this could be the transmission possibly making this sound. Members have been going to great lengths with the motor and other motor accessories being replaced and it did not resolve the issue. The transmissions in these trucks have had tons of issues so it wouldn’t surprise me.

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Spectre04 · April 4, 2018

Just another person chiming in.

No audible ticking at idle outside of normal valve sounds. When cruising around 45-50 MPH and above, what sounds like an exhaust leak is heard from driver's footwell. Seems louder in 4cyl operation than 8cyl. Seems to be either more quiet or plain non-existent when ambient temp is cold. I noticed it when on a road trip with three people in the cab, and the truck had 750 miles on it.

I haven't tested it with a trailer yet, but now have 2300 miles on the truck and it persists. No unusual transmission behavior, just the usual hesitation when reactivating the other 4cyl and dropping gears during acceleration (seems like a 185 operating temp is norm).

Oil pressure ranges between 38-42 regardless of situation.

Nothing like the loud clacking at idle as seen on youtube videos. I swear I heard it get louder when driving in inside lane next to barriers, but traffic was heavy and can't confirm.

I'm going to haul a little trailer around with some extra folks in the car to prove it's load-dependent. Either way, truck runs fine. I know it's not a helpful post...sorry.

jasinger · April 4, 2018

3 minutes ago, Spectre04 said:

Just another person chiming in.

No audible ticking at idle outside of normal valve sounds. When cruising around 45-50 MPH and above, what sounds like an exhaust leak is heard from driver's footwell. Seems louder in 4cyl operation than 8cyl. Seems to be either more quiet or plain non-existent when ambient temp is cold. I noticed it when on a road trip with three people in the cab, and the truck had 750 miles on it.

I haven't tested it with a trailer yet, but now have 2300 miles on the truck and it persists. No unusual transmission behavior, just the usual hesitation when reactivating the other 4cyl and dropping gears during acceleration (seems like a 185 operating temp is norm).

Oil pressure ranges between 38-42 regardless of situation.

Nothing like the loud clacking at idle as seen on youtube videos. I swear I heard it get louder when driving in inside lane next to barriers, but traffic was heavy and can't confirm.

I'm going to haul a little trailer around with some extra folks in the car to prove it's load-dependent. Either way, truck runs fine. I know it's not a helpful post...sorry.

welcome to the club.. I noticed mine early on like you about 500 miles on my first highway road trip over the summer. Towed my snowmobile trailer this winter (about 400 mile highway trips) a few times with about 5k on the truck and it still made the same "exhaust leak" like sound from the drivers footwell. It seemed a little more intermittent in the winter but was definitely still the same sound.