Anyone hit twice by lightning?

Rocky Mountain Equines · 11-11-2012, 02:48 PM

Picking up my 2011 2500HD tomorrow after fuel pump failure resulted in system rebuild from pump to injectors. The truck is stock except for a turnover ball. This ocurred at 11,000 miles although most of the miles are in front of a trailer with 7 tons of hay. Has anyone had 2 pump failures? Fortunately the failure occured on a flat, straight road with no traffic and no load in the trailer. It doesn't bear thinking about if this had happened while loaded and in the mountains. With this extensive dealer service disassembly/reassesmbly anything else to be on the lookout for?

many thanks!

**KensAuto** · 11-11-2012, 04:03 PM

maybe start using an additive like opti-lube....did they give a reason for failure, did they test the fuel, etc.Several guys have lost pumps and i think it would be great to know why. could be 10 different reasons or maybe the pumps themselves. Most guys will agree at the very least we should be adding something to help lube the cp4s

PirateDiesel12 · 11-11-2012, 06:10 PM

...not only lube but I think better filtration is probably top priority. Ford guys are having the CP4.2 fail even more than us, I think due to Fords not having a decent filtration system. I suggest running a lift pump with a 2 Micron absolute filter.

Shocky111 · 11-12-2012, 12:27 PM

is a pump loss as expensive a repair on the LML as it was on my 2004 6.OL. Cab off? I hope i did my homework well before purchasing the 2012 LML...thus far, all is well.

**KensAuto** · 11-12-2012, 12:52 PM

I think a safe estimate would be 10-12k if the entire system is replaced, if the pump shells out metal filings

Shocky111 · 11-12-2012, 01:32 PM

Was trolling and saw this. I have lots to learn on the LML fuel delivery system. I do my best to purchase fuel from reputable locations with high turns but sometimes ya gotta do what ya gotta do. I’m at 5k on the lml and using the opti-lube now. I don’t know that I can support claims of reduced emissions and more power with increase in millage, I haven’t seen this and my regen cycle is about the same, fuel mileage is the same. Had my 2004 6.0L since new and clocked 160K miles and had every failure you could have…I maintained that truck to perfection.

They making aftermarket filtration systems for the lml that wont void warranty?

Dirtymax716 · 11-12-2012, 01:41 PM

Moss-Mag act helps this out. You cannot be denied a warranty claim if you are adding something that did not cause damage. Filters are a fine example. Say you used WIX branded filters, I know, I know the feelings of some, but a good example. By using WIX filters and something happens, GM has to prove the filters did the damage.

Look at my sig. I'm using a Caterpillar 1r-0770 water separator that filters down to 3 microns. Using a nicktane or Underground diesel adaptor I am running a 1r-0750 fuel filter that is 2 microns. These are absolute micron numbers not nominal.

Ford redesigned their system again for the 2011+ and are having nothing but trouble. I'm new to diesels, somewhat, but as I see it the filters are not doing a good job in stopping the water to this pump.

Rocky Mountain Equines · 11-12-2012, 08:14 PM

Picked up the truck today. Cost of repair: covered under warranty, no dollar amounts on the paper work but I was told GMC paid the dealer for 28 hours of work. They remove both the bed & the cab. Washed out the tank, replaced everythring from the tank to, and including the injectors. The repair manager says the pump is updated, not the original 2011, supposedly the injectors are also updated. This is the 10th fuel replacement they have done on a 2011, supposedly no 2012 failures. This by the way is a small dealership serving a large rural area in Western US so they do see a lot of trucks.

On a 120 mile return trip the indicated MPG increased from its previous 16-17, no load highway to 22mpg, hope this lasts. Will be back to hauling a load next week

The dealer ship of course has no insight into why.......so no advice on keeping it from happening again. They claim none of the other 10 have had further fuel issues. If this was a fuel pump quality control issue then for 2011s its a roll of the dice and additives or a filter would not have prevented the issue.

**KensAuto** · 11-12-2012, 08:20 PM

thanks for the update

Dirtymax716 · 11-15-2012, 05:34 AM

Appreciate the update. Good to know GM is on top of this. Sorry to know you were the guinea pig though.

11-11-2012, 02:48 PM	eBay Motors #1 (permalink)
Rocky Mountain Equines Join Date: Nov 2012 Posts: 2	Anyone hit twice by lightning? Picking up my 2011 2500HD tomorrow after fuel pump failure resulted in system rebuild from pump to injectors. The truck is stock except for a turnover ball. This ocurred at 11,000 miles although most of the miles are in front of a trailer with 7 tons of hay. Has anyone had 2 pump failures? Fortunately the failure occured on a flat, straight road with no traffic and no load in the trailer. It doesn't bear thinking about if this had happened while loaded and in the mountains. With this extensive dealer service disassembly/reassesmbly anything else to be on the lookout for? many thanks!

11-11-2012, 04:03 PM	eBay Motors #2 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,163	maybe start using an additive like opti-lube....did they give a reason for failure, did they test the fuel, etc.Several guys have lost pumps and i think it would be great to know why. could be 10 different reasons or maybe the pumps themselves. Most guys will agree at the very least we should be adding something to help lube the cp4s __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

11-11-2012, 06:10 PM	eBay Motors #3 (permalink)
PirateDiesel12 Junior Member Join Date: Jun 2012 Location: Winston-Salem, NC Posts: 203	...not only lube but I think better filtration is probably top priority. Ford guys are having the CP4.2 fail even more than us, I think due to Fords not having a decent filtration system. I suggest running a lift pump with a 2 Micron absolute filter. __________________ 2012 Chevy D/A CC LT Z71 ALL BLACK Stock...for now.:what

11-12-2012, 12:27 PM	eBay Motors #4 (permalink)
Shocky111 Join Date: Aug 2012 Location: North East Indiana Posts: 4	is a pump loss as expensive a repair on the LML as it was on my 2004 6.OL. Cab off? I hope i did my homework well before purchasing the 2012 LML...thus far, all is well. Last edited by Shocky111; 11-12-2012 at 12:32 PM. Reason: update

11-12-2012, 12:52 PM	eBay Motors #5 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,163	I think a safe estimate would be 10-12k if the entire system is replaced, if the pump shells out metal filings __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

11-12-2012, 01:32 PM	eBay Motors #6 (permalink)
Shocky111 Join Date: Aug 2012 Location: North East Indiana Posts: 4	Was trolling and saw this. I have lots to learn on the LML fuel delivery system. I do my best to purchase fuel from reputable locations with high turns but sometimes ya gotta do what ya gotta do. I’m at 5k on the lml and using the opti-lube now. I don’t know that I can support claims of reduced emissions and more power with increase in millage, I haven’t seen this and my regen cycle is about the same, fuel mileage is the same. Had my 2004 6.0L since new and clocked 160K miles and had every failure you could have…I maintained that truck to perfection. They making aftermarket filtration systems for the lml that wont void warranty?

11-12-2012, 01:41 PM	eBay Motors #7 (permalink)
Dirtymax716 Junior Member Join Date: Sep 2012 Location: ny Posts: 109	Moss-Mag act helps this out. You cannot be denied a warranty claim if you are adding something that did not cause damage. Filters are a fine example. Say you used WIX branded filters, I know, I know the feelings of some, but a good example. By using WIX filters and something happens, GM has to prove the filters did the damage. Look at my sig. I'm using a Caterpillar 1r-0770 water separator that filters down to 3 microns. Using a nicktane or Underground diesel adaptor I am running a 1r-0750 fuel filter that is 2 microns. These are absolute micron numbers not nominal. Ford redesigned their system again for the 2011+ and are having nothing but trouble. I'm new to diesels, somewhat, but as I see it the filters are not doing a good job in stopping the water to this pump. __________________ 2012 2500 HD Z71 CCSB LTZ Gunmetal Blue S&B Oil Intake NickTane adapter with 1r-0750 cat Modified CAT 177-9778 base with 1r-0770 water sep. HID low beams/fog lights DDM tuning (No DRL thank you)

11-12-2012, 08:14 PM	eBay Motors #8 (permalink)
Rocky Mountain Equines Join Date: Nov 2012 Posts: 2	Picked up the truck today. Cost of repair: covered under warranty, no dollar amounts on the paper work but I was told GMC paid the dealer for 28 hours of work. They remove both the bed & the cab. Washed out the tank, replaced everythring from the tank to, and including the injectors. The repair manager says the pump is updated, not the original 2011, supposedly the injectors are also updated. This is the 10th fuel replacement they have done on a 2011, supposedly no 2012 failures. This by the way is a small dealership serving a large rural area in Western US so they do see a lot of trucks. On a 120 mile return trip the indicated MPG increased from its previous 16-17, no load highway to 22mpg, hope this lasts. Will be back to hauling a load next week The dealer ship of course has no insight into why.......so no advice on keeping it from happening again. They claim none of the other 10 have had further fuel issues. If this was a fuel pump quality control issue then for 2011s its a roll of the dice and additives or a filter would not have prevented the issue.

11-12-2012, 08:20 PM	eBay Motors #9 (permalink)
KensAuto Duramax Lifetime Supporter Join Date: Apr 2012 Location: Casa Grande, Az Posts: 2,163	thanks for the update __________________ 2012 GMC 2500 SLT 4x4 H&S minimaxx, MBRP downpipe back SS duals, Insight CTS w/backup cam, Fass HD150, PPE rear diff cover, Amsoil front to rear w/by-pass Cognito 4-6 NTBD w/idler/pitman braces, a-arms, Monster energy 18x9 w/BFG KM2s 35x12.5, Recon smoked cab lights Titan 57 gal saddle tank, linex color matched bedliner w/kevlar, Trekstep bed steps x2, RBP rail steps

11-15-2012, 05:34 AM	eBay Motors #10 (permalink)
Dirtymax716 Junior Member Join Date: Sep 2012 Location: ny Posts: 109	Appreciate the update. Good to know GM is on top of this. Sorry to know you were the guinea pig though. __________________ 2012 2500 HD Z71 CCSB LTZ Gunmetal Blue S&B Oil Intake NickTane adapter with 1r-0750 cat Modified CAT 177-9778 base with 1r-0770 water sep. HID low beams/fog lights DDM tuning (No DRL thank you)

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