Engine Tick - 2015 GMC Sierra 5.3

[Sean Neilan]

Does the tick change tempo/rhythm with rpm or does it stay constant?

Edited October 26, 2016 by novembervictor

[MOhunter92]

Does the tick change tempo/rhythm with rpm or does it stay constant?

It coincides with acceleration, as rpm increases the ticking rhythm does as well. I'm confident it's either

 

1. A small exhaust leak

2. Injectors

3. Fuel line or pump

 

 

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[tobinstetson]

It coincides with acceleration, as rpm increases the ticking rhythm does as well. I'm confident it's either

 

1. A small exhaust leak

2. Injectors

3. Fuel line or pump

 

 

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That is what mines sounds like as well. I can rule out the fuel pump and lines. I've had this all replaced and no difference. My AFM valve lifters have been replaced as well.

[MOhunter92]

That is what mines sounds like as well. I can rule out the fuel pump and lines. I've had this all replaced and no difference. My AFM valve lifters have been replaced as well.

Right, I saw you replaced lifters. I think it's the exhaust then, makes sense to me. The sound definitely could be a leak

 

 

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[tobinstetson]

Right, I saw you replaced lifters. I think it's the exhaust then, makes sense to me. The sound definitely could be a leak

 

 

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Yeah, i've always thought exhaust too. but mine only happens now and then. that makes me think of the valve timing.

[MOhunter92]

Yeah, i've always thought exhaust too. but mine only happens now and then. that makes me think of the valve timing.

It comes from driver side floor board, if it was something like that it would be resonating more in the cab on both sides

 

 

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[tobinstetson]

That is true. that is exactly where mine seems to come from.

[MOhunter92]

That is true. that is exactly where mine seems to come from.

Exactly, which makes me believe it must be exhaust or possibly an a/c pump or something positioned on that driver side. It's definitely not the motor. Really weird

 

 

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[tobinstetson]

Exactly, which makes me believe it must be exhaust or possibly an a/c pump or something positioned on that driver side. It's definitely not the motor. Really weird

 

 

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Isn't the AC compressor on the lower passenger side of the motor?

[MOhunter92]

Isn't the AC compressor on the lower passenger side of the motor?

I would have to double check I was just throwing out sources of what could be the noise

 

 

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[tobinstetson]

I would have to double check I was just throwing out sources of what could be the noise

 

 

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Yeah, i'll try leaving my AC off for awhile and see if i notice a difference. In canada now we don't need AC, but i have a habit of just hitting the Auto HVAC button.

[MOhunter92]

Yeah, i'll try leaving my AC off for awhile and see if i notice a difference. In canada now we don't need AC, but i have a habit of just hitting the Auto HVAC button.

A while ago, I was testing this out and I noticed with the windshield defroster on and set over 74 degrees, the chatter was significantly less, hands down. Now when I test that, it doesn't make a difference. Really weird, but it for sure made a difference in how loud it was before. The air off did not make a difference, it was with the windshield defroster set at a warm temp that made it much less loud.

 

 

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[tobinstetson]

could this vacuum pump failure be the ticking noise a lot of us are hearing?

 

http://www.gm-trucks.com/forums/topic/193570-2014-chevrolet-silverado-1500-engine-failure/page-4

[DPetry94]

Anyone have an update? I've had an issue with a noise on my truck for a while and the dealer is useless and the noise bugs me so much.

[ct_corey]

been to the dealer a few times on this. They tried replacing the exhaust and some fuel pressure check valve. Still does it. Last time, they told me they hear it but have no idea what it is.

mine is so loud that I was actually able to record it on my cell phone