Odd noise upon remote start - with video

[Buckfutter]

It sounds like something fluid is pressuring upon startup. Kind of like the older power steering pumps. I know these are electric. But, they have a vacuum pump, or maybe trans related with the torque converter building pressure?

I can totally hear that now… I’ll see next time I start it up…. Have my wife hit the button and I’ll try and pinpoint where it’s coming from under the hood.

 

[petethepug]

Audi & VW had this issue for a while. When inside the truck it’s not audible because your vehicle is insulated. Outside it’s frick’n scary to hear. It’s likely the SAI or secondary air injection pump used to feed the converters air so they go off faster.

 

[SpyShops212]

My 2018 Escalade makes the same noise. I read somewhere about the fuel pump pressure priming the pump. If I find the TSB, I will post.

 

[B-train]

@SpyShops212 That would make sense for the sound and quick duration of the high pressure pump. Good insight

 

[BlaineBug]

It may be the oil pump, I'm not sure - they make a ticking sound as well. A lot of people post about that (or used to) and they too were concerned.

 

[petethepug]

2015 is when GM went to direct injection on the Escalade. Make sense it’s something to do with the high pressure fuel system.

 

[B-train]

So, just an update, my 2017 6.2L does the same thing. I heard it as the wiff started it just now and I was outside. Definitely leaning towards high pressure pump. It growled for a split second after startup. Kind of reminds me of the 3800 engines in the W body cars when they started. Back then I think it was a timing change that made the growl - timing retarded for cranking and then increased with initial engine rpm.........put 100's of thousands-za on those cars w/o any issues whatsoever.

I'm gonna run it. At least with 130k I think I'm past the new main bearing failures....LOL

 

[D--k]

I'm experiencing this same issue with a 2011 yukon. I haven't discovered and answer... wrecking my head as to what occurs differently upon remote use vs key starting the vehicle.
Will follow, and post if I find a cause...

Dealer service agent thought it might be transmission related... transmission shudder was noticeable in mine at the time. I have since replaced the trans, 180k, without further issues of the remote start...

 

[BlaineBug]

Dealer service agent thought it might be transmission related... transmission shudder was noticeable in mine at the time. I have since replaced the trans, 180k, without further issues of the remote start...

I don't think so, at all.

 

[Buckfutter]

I’ve made the decision to just run it….