Engine Tick - 2015 GMC Sierra 5.3

PackerChev · April 19, 2018

It’s located between the chassis fuel line and the high pressure fuel pump.

It seems to have done the trick on mine. I’ll keep you posted as I drive it throughout the next week. The TSB was PIP5395D.

jasinger · April 19, 2018

do you have a copy of the TSB document? i just tried looking it up and can't find anything useful online

ChristopherDB · April 20, 2018

Is this the same tick that everybody else is experiencing? I have a 6.2L

Dealer said is it fuel injectors but the tick gets faster at higher RPMs and when I let off the gas at a high RPM the tick remains fast and doesn't slow down so I don't think it is noisy injectors because the tick would have slowed when I let off the throttle.

Colossus · April 22, 2018

probably not.. after all.. the GMT-800s and 900s got by just fine with ticking and cold start knock..

jasinger · May 2, 2018

On 4/18/2018 at 8:19 PM, PackerChev said:

It’s located between the chassis fuel line and the high pressure fuel pump.

It seems to have done the trick on mine. I’ll keep you posted as I drive it throughout the next week. The TSB was PIP5395D.

Hey Parker, any updates on if the tick is gone?

Edited May 2, 2018 by jasinger

PackerChev · May 2, 2018

The tick is mostly gone. And by that I mean that I can hear it very faintly once in a while but it seems that it goes to V8 mode or upshifts right away. If I didn’t know about the tick I wouldn’t know it was there. Much improved!

ChristopherDB · May 2, 2018

Does the TSB apply to the 6.2L as well?

jasinger · May 3, 2018

21 hours ago, PackerChev said:

The tick is mostly gone. And by that I mean that I can hear it very faintly once in a while but it seems that it goes to V8 mode or upshifts right away. If I didn’t know about the tick I wouldn’t know it was there. Much improved!

thanks for the info, I think I'm going to head to the dealership soon. I've been convincing myself some days that its fine and other days it bugs the hell out of me

bkesting · May 3, 2018

20 minutes ago, jasinger said:

thanks for the info, I think I'm going to head to the dealership soon. I've been convincing myself some days that its fine and other days it bugs the hell out of me

I'm the same way.....I'm sure it's just as noticeable every day, but there are days I really notice it and days it just must blend into all the other background noise

jasinger · May 3, 2018

44 minutes ago, bkesting said:

I'm the same way.....I'm sure it's just as noticeable every day, but there are days I really notice it and days it just must blend into all the other background noise

Yeah and also partially because I'm a little reluctant to get into it with the dealership. first try to explain it and hopefully replicate it for them during a drive, then also going through the procedures of them wanting to replace/check other things like the valvetrain or exhaust even though people have confirmed that it wasn't the issue. I was going to wait until there was a clear cut "fix it" answer that I could bring up with them, so maybe this TSB is it

ChristopherDB · May 3, 2018

I have noticed that when I hear the tick if I pull a hard left or hard right (I mean really hard) the ticking stops while I'm turning. I tested this going 40 MPH in manual gear at 4k RPM on a two lane road. I was in the right lane and then pulled hard left all the way to the left lane. The ticking was silent until I straightened out.

MOhunter92 · May 3, 2018

I have noticed that when I hear the tick if I pull a hard left or hard right (I mean really hard) the ticking stops while I'm turning. I tested this going 40 MPH in manual gear at 4k RPM on a two lane road. I was in the right lane and then pulled hard left all the way to the left lane. The ticking was silent until I straightened out.

It’s jostling that causes it to come and go. I’ve had to slam on brakes before and that caused it to start then I hit a bump later and it goes away. I’ve heard it ticking and then just completely stop out of nowhere

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ChristopherDB · May 4, 2018

So there's 18 pages of this but it seems like there's many different parts that were replaced. We still don't know exactly what it is?

Just like the other two posters earlier today, I'm reluctant to go to the dealer because it's an entire day of my time and they'll either say it's normal, can't reproduce, within specs, etc.

jasinger · May 4, 2018

I decided to finally call a dealership yesterday to make an appointment, one that I've had good luck with service before even though its a different one than where I bought the truck. I'm just hoping that the tick will be audible that day, and I'm still debating on whether I want to mention the TSB or just let them go through their own process without my input

bkesting · May 4, 2018

3 hours ago, jasinger said:

I decided to finally call a dealership yesterday to make an appointment, one that I've had good luck with service before even though its a different one than where I bought the truck. I'm just hoping that the tick will be audible that day, and I'm still debating on whether I want to mention the TSB or just let them go through their own process without my input

Keep us posted on the outcome