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Fuel pump comes on when I open door

Dusterpilot
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Dusterpilot Enthusiast

Dusterpilot

Posted
Posted

2017 Silverado 1500, 1008 miles... noticed that fuel pump runs for a second when I open drivers door, is this normal? I'm also having surging issues when under light acceleration on a hill... anyone else have this problem? My 2014 didn't do this...?

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TJay74
TJay74

Actually the DI engines use two pumps due to how high the fuel pressure requirements are, that is why the 2017+ trucks are now priming the pump when the drivers door opens. It lessens the engine start

newdude
newdude

Lets clear this up.   All GM SIDI engines have TWO fuel pumps. A supply/low pressure pump, and a high pressure pump.   The Supply/Low pressure pump, and the entire fuel system leading to the hi

qwank
qwank

you guys are so impatient. There will be a fix soon. The 14-16s don't do it so I'm sure they'll fix the software.   I don't see what the big deal is.

Albytruck Enthusiast

Albytruck

Posted
Posted (edited)

To my understanding the pump is just priming when the door is opened. Does that on my 2017 also, normal.

 

I am also having surging or shuddering during light acceleration.

 

Hopefully more will chime in on the surging.

Edited by Albytruck
GMC2015 Enthusiast

GMC2015

Posted
Posted

The fuel pump priming when you open the door is a new feature on the 2017s, probably to shorten the start times on the DI engines.

 

As for the surging, I've seen some posts on people having to replace the torque converters on brand new 2017s because of that.

Mark Diedrich Enthusiast

Mark Diedrich

Posted
Posted

Is the shudder at any speed? or primarily between between 35-65 (if your above or below it doesn't do it)? is your tach "bouncing" a few hundred rpm at the same time?

If it's only between those speeds, it's probably the torque converter like you stated....

Yes, the fuel pump is normal when you open the driver's door.

87shelbycsx Enthusiast

87shelbycsx

Posted
Posted

Mine does the same thing, I do know the 6.2 has a mechanical pump. It has a roller and runs off the cam. I'm working on the launch of the 6.2 in Spring Hill,Tn. And happened to notice it while delivering parts.

 

Sent from my SAMSUNG-SM-G920A using Tapatalk

  • Like 1
Albytruck Enthusiast

Albytruck

Posted
Posted

Is the shudder at any speed? or primarily between between 35-65 (if your above or below it doesn't do it)? is your tach "bouncing" a few hundred rpm at the same time?

If it's only between those speeds, it's probably the torque converter like you stated....

Yes, the fuel pump is normal when you open the driver's door.

 

Shudder is not restricted to any speed. No, the tach does not bounce, it is definitely something that can be felt though.

1200 miles 2017 Silverado, 5.3, LTZ CC 4x4

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

I get a rpm surge from 2nd to 3rd gear occasionally. 95% of the time it happens it's on the same little hill as I'm pulling out of the gym. It's about a 1000k rpm surge during gearchange.

 

 

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qwank Senior Enthusiast

qwank

Posted
Posted

GM knows about the surging but there is no fix for it yet. Bulletin # PIP5457B

My truck does it too, I didn't notice until a customer brought one is and complained about it.

 

My fuel also primes when I open the door. DI engines take longer to fire up due to having to build high pressure and I think this is a way to shorten crank time.

Colossus Senior Enthusiast

Colossus

Posted
Posted

And people wonder why the batteries don't last 4+ years anymore. All this electronic crap.

  • Like 1
foghorn23 Senior Enthusiast

foghorn23

Posted
Posted (edited)

Thanks for all in the info in this thread. I wasn't sure what I was hearing when I opened the door or my 17 Sierra. As noted, I certainly didn't have any sounds like that in the 14. Strange how hearing "normal" on this forum is a whole lot more believable than hearing it from a tech; but it is.

 

Thankfully I haven't noticed any surging, but my truck was a late November build so maybe they got it right... Fingers-crossed.

Edited by Foghorn17
tbarn Senior Enthusiast

tbarn

Posted
Posted

" Strange how hearing "normal" on this forum is a whole lot more believable than hearing it from a tech; but it is."

 

Really?

  • Like 1
15_silverado Enthusiast

15_silverado

Posted
Posted

GM knows about the surging but there is no fix for it yet. Bulletin # PIP5457B

My truck does it too, I didn't notice until a customer brought one is and complained about it.

Mine does this too, 2017 5.3 6 speed

 

Do they think it's the torque converter or something else?

 

Does anyone think this surging is causing any damage to the transmission? ; Would it be better to make the transmission downshift to stop the surging?

qwank Senior Enthusiast

qwank

Posted
Posted

I'm not sure what they think/ I'm hoping it's just going to be updated software for the ECM or TCM.

My truck is a 6 speed but the customer's truck at work was an 8 speed.

Bayou-AllTerrain Enthusiast

Bayou-AllTerrain

Posted
Posted

Mine does the same thing, I do know the 6.2 has a mechanical pump. It has a roller and runs off the cam. I'm working on the launch of the 6.2 in Spring Hill,Tn. And happened to notice it while delivering parts.

 

Sent from my SAMSUNG-SM-G920A using Tapatalk

I'm not so sure of that. I have a 2017 w/ 6.2 and I have the same fuel pump priming when I open the door.

 

 

Sent from my iPhone using Tapatalk

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