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Discussion Starter · #1 ·
so what I'm reading is that a few people are having issues with the fuel pump and its leaking gas into the oil - which could eventually wear the motor out and give bad fuel economy i would think.

When I buy a Nox, how can I ensure it doesn't have this issue? Is there a TSB out or replacement for it at this point?

Or is it more of a wait and see?
 

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Is this problem affecting the I4 or the V6?
 

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Discussion Starter · #3 ·
I've read on here its both. I'm wondering if this is bad enough to be considering another vehicle at least until GM recognizes the issue?
 

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Seems like it's much more common on the four cylinders... although there aren't that many V6 owners around.

Not sure it's as widespread as is indicated on this forum. Forums tend to concentrate complaints like this. The 4-banger folks I've spoken with on the streets are oblivious...
 

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The fuel pump was changed over to new one at the start of the 2011 production year. Our production years run from July to June. Depending on when the vehicle was produced, it should have been built with the new pump.

Tricia, GM Customer Service.
 

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This issue is really being blown out of proportion.
 

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POTENTIALLY this means your new car could have a flat tire
 

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OnxBear said:
LMAO[/color]
Thanks for understanding...

ssu2k said:
So, I purchased my car not even a week ago. Does this mean my car could POTENTIALLY have this situation also?
My smarta$$ reply wasn't directed @ you...it's just your post was at the right place at the right time...

It was mentioned elsewhere recently that forums have a tendancy to make "issues" look bigger than they may actually be, and such is the apparent to date case here as well

I don't think the V6 will have nearly the failure rate of the I4...and I don't think the I4 failure rate is going to be nearly as big as the threads make it out to be

My 0.02
 

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POTENTIALLY this means your new car could have a flat tire
This!


The V6 uses a different fuel pump than the I4

The 3.0 and 3.6 share the same high pressure engine driven fuel pump, and I have not heard of any issues with them...The 3.6 has been in production since 2008

Just for fun the 3.0 runs a range of 2-15 MPA (megapascals) for fuel pressure........That means it is capable of 2175psi :eek:, idle is 508psi (imagine a leak in that setup!)
 

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Out of curiousity, last time I had my 2011 Terrain in (engine date of August 4th, 2011) I asked my dealer to let me know what part number the HPFP was. My invoice states, "UNABLE TO FIND". And yet they advertise a BIG "CERTIFIED GMC MECHANIC" banner in their service department.

REALLY? You can't FIND it?

So, not being overly mechanical myself - but able to use a flashlight, screwdrivers, wrenches, and get dirty - is there anyone that can tell me where it's located so I can do my dealerships work for them?

I've searched online for the location, this forum for the location (only found "passenger's side") and I don't own the service manual.

Much appreciated.

Adam
 

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theres 2 pumps on the DI engines. 1 in the tank and the other is somehow driven by the cam.
On the 3.6 DI's- with the engine sideways- the pump is on the side of the engine closest to the firewall I believe.
Attached somewhere along where the valve cover would be....
dont know if that helps you any- as I dont know if you have the I4.
 

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APCassidy said:
Out of curiousity, last time I had my 2011 Terrain in (engine date of August 4th, 2011) I asked my dealer to let me know what part number the HPFP was. My invoice states, "UNABLE TO FIND". And yet they advertise a BIG "CERTIFIED GMC MECHANIC" banner in their service department.

REALLY? You can't FIND it?

So, not being overly mechanical myself - but able to use a flashlight, screwdrivers, wrenches, and get dirty - is there anyone that can tell me where it's located so I can do my dealerships work for them?
2.4L = 12639694
3.0L = 12622475

Pretty sure these are the locations (going off memory so might be slightly off lol)

2.4L is front of engine drivers side. You will see the fuel rails coming into it, will have a fiber insulation cover over it
3.0L is rear cams, drivers side, must remove the cover to see it.
 

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grometsc,

Thanks for the information, I'll take a look at it when I get back to the house tonight. If you happen to see/answer this in the next 3-4 hours, can you tell me if the part numbers are easily visible or if I will need to get under the car in order to see the part number I have? I know the part number you list is the most recent, I came across the numbers when searching to find the part, but I'm looking for the part itself to see if I can tell what part number I have on my vehicle. Just for information sake.

Thanks again for your help, hopefully this wont' be too difficult for an after work/before dinner expedition.
 
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