Engine Tick - 2015 GMC Sierra 5.3

PackerChev · July 12, 2018

My invoice reads the following:

looksstock · July 12, 2018

Nice to see potential progress on this. I traded it my '17 Sierra Ultimate because of this (and lack of rear ac & bsm). Happy with my F150 (no ticking) - hope it gets resolved, other than the transmission clunk and the AFM tick - it drove nice...

mookdoc6 · July 13, 2018

On 7/1/2018 at 2:49 PM, Colossus said:

what the hell are you smoking? I live in the truck capital of the united states and there are 10 old Chevy trucks to ever 1 Ford and Dodge. Sorry son, your argument don't hold shit around here.

Lol, Exactly? I live in No salt, no rust capitol of the united states and there are probably 10 Chevy trucks to every 1 Ford..It's apparently obvious here because there is no corrosion whatsoever! What is left on the road is pure overall durability and maintenance and some luck......and they are simply not Ford trucks....

20165.3Eco · July 13, 2018

Scratch that, did some driving on the highway last night and this morning. Noise is back louder than ever. Yay.

Hoping to trade on of two vehicles next week.

20165.3Eco · July 13, 2018

Update. As the noise gets worse you can down shift in manual mode to make it more audible while off the throttle. If you mash the brakes enough to get the nose of the truck to drop the sound will stop. I can replicate this any time at any speed at any rpm. Just keep some peddle to maintain load on the engine.

So, that means there’s is either something moving downward and or forward that is causing the noise or the engine is moving slightly downward or slightly forward making the noise stop.

Everyone with this noise noise give this a shot and see if it holds true.

Spastik Monkey · July 13, 2018

25 minutes ago, 20165.3Eco said:

Update. As the noise gets worse you can down shift in manual mode to make it more audible while off the throttle. If you mash the brakes enough to get the nose of the truck to drop the sound will stop. I can replicate this any time at any speed at any rpm. Just keep some peddle to maintain load on the engine.

So, that means there’s is either something moving downward and or forward that is causing the noise or the engine is moving slightly downward or slightly forward making the noise stop.

Everyone with this noise noise give this a shot and see if it holds true.

Confirmed on mine as well.

Jonty711 · July 14, 2018

3 hours ago, Spastik Monkey said:

Confirmed on mine as well.

Mine stops when going over a bump like rail tracks. I wonder what the commonality is between both conditions, braking and the bump?

Spastik Monkey · July 14, 2018

4 minutes ago, Jonty711 said:

Mine stops when going over a bump like rail tracks. I wonder what the commonality is between both conditions, braking and the bump?

Slight movement of the engine. I can't think of anything else.

Jonty711 · July 14, 2018

2 minutes ago, Spastik Monkey said:

Slight movement of the engine. I can't think of anything else.

My thoughts too. So I wonder are the motor mounts the root cause?

20165.3Eco · July 14, 2018

I highly doubt it’s the motor mounts. My money is on an exhaust leak at the sealing donut from manifold to pipe. It’s load dependent and usually exhaust leaks are pretty pronounced under load.

My mounts were were replaced for shitty idle. (Still idles rough anyways) I believe the manifolds were removed to do so. I never had a peep out of the engine before that service was performed.

God if help us if something internal is effected by external factors. Hopefully I’m finished with it next week sometime when I’m driving something different.

Spastik Monkey · July 14, 2018

37 minutes ago, 20165.3Eco said:

I highly doubt it’s the motor mounts. My money is on an exhaust leak at the sealing donut from manifold to pipe. It’s load dependent and usually exhaust leaks are pretty pronounced under load.

My mounts were were replaced for shitty idle. (Still idles rough anyways) I believe the manifolds were removed to do so. I never had a peep out of the engine before that service was performed.

God if help us if something internal is effected by external factors. Hopefully I’m finished with it next week sometime when I’m driving something different.

I've got long tube headers and an aftermarket cat back. Ball flange was replaced with a V band. Noise is still there

20165.3Eco · July 14, 2018

2 hours ago, Spastik Monkey said:

I've got long tube headers and an aftermarket cat back. Ball flange was replaced with a V band. Noise is still there

Shit I forgot you did that. So, it has to be fuel system related ? I was laying under mine the other day with it in park and it sounded pretty noisy in the torque converter area. It seems like in my truck the noise only happens in TQ lockup. I wonder if it has something to do with the TQ. I just can’t see a smaller force like braking effecting that.

Maybe its it’s a fuel supply or return line moving around ? I zip tied my return line at a different angle the other day and that didn’t change anything.

Spastik Monkey · July 14, 2018

3 minutes ago, 20165.3Eco said:

Shit I forgot you did that. So, it has to be fuel system related ? I was laying under mine the other day with it in park and it sounded pretty noisy in the torque converter area. It seems like in my truck the noise only happens in TQ lockup. I wonder if it has something to do with the TQ. I just can’t see a smaller force like braking effecting that.

Maybe its it’s a fuel supply or return line moving around ? I zip tied my return line at a different angle the other day and that didn’t change anything.

Fuel or transmission is the best I can figure