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Old 06-16-2011, 08:25 PM   eBay Motors  #1 (permalink)
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06 fuel problems??

so my moms way off in BFE hauling her horses to texas and she has a 06 lbz and its hauling a big trailer. like air bags totally full and its still on the overloads. and it stalls and goes into limp mode. she goes to a mechanic, and the computer says its not getting enough fuel rail pressure.(stock truck) brand new fuel filter and still the same. sooo, he looked underneath and that cooler thats under neath was totally loaded up with mud. she said it seems to be running ok after they cleaned the mud off, but it was only doing it when it was like 90 degrees out and its cooled off since then. shes parked for the night and needs to know if shes good to go for the morning.
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Old 06-16-2011, 08:27 PM   eBay Motors  #2 (permalink)
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maybe it overheated instead of ran out of fuel.

i'd give it another go. towing extremely heavy and having crap in the fins isn't good for business during 95 degree weather IMO

should be fine, if not and it is fuel related check FPR and CP3 function
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Old 06-16-2011, 09:14 PM   eBay Motors  #3 (permalink)
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cp3s dont go out very often on a stock truck?? and it runs ok when she lets it sit for awhile, and if the engine just got hot why would the low rail pressure code pop up?
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Old 06-17-2011, 08:13 AM   eBay Motors  #4 (permalink)
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there was a fuel line fix out there for when you were hauling heavy. PM jerry the super mod. He will know what I am talking about.
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Old 06-17-2011, 08:10 PM   eBay Motors  #5 (permalink)
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#PIP4526: Diesel Engine Fuel Line Repairs - keywords DTC hose kink loss P0087 P0093 P1093 pipe power reduced repair restrict restriction SES suction supply vacuum - (Nov 7, 2008)


Subject: Diesel Engine Fuel Line Repairs


Models: 2001-2007 Chevrolet Silverado Classic

2001-2007 GMC Sierra Classic

2007-2009 Chevrolet Silverado

2007-2009 GMC Sierra

Equipped with the 6.6L Diesel Engine RPO codes LB7 LBZ LLY LMM




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A dealer may need to perform a repair on the rubber portion of the fuel supply (suction) lines. The rubber section of the line could become kinked or collapse. Fuel lines that kink or collapse may induce a fuel system restriction (high vacuum gauge readings) or DTCs P0087, P0093, and/or P1093 to set.

If a technician was to suspect the rubber portion of the fuel feed line collapsing or kinking, replacement of only the rubber line is acceptable.

Recommendation/Instructions:
Complete the steps below to repair the rubber section of fuel supply line:

Carefully cut, split, and remove the OEM crimp from both ends of the flexible hose. These crimps can be cut with a small cut-off wheel. Split the crimp into two pieces (use your discretion on first cut location, then cut directly across from, or 180 degrees from first cut). Special care must be taken not to damage the flare on the end of the steel pipe that will be reused.
Remove the OEM crimps and flexible portion of hose from the existing supply line.
If replacing the rubber section of the supply line, a 1/2 ID hose meeting SAE specification 100R3 is suggested. Dealers may be able to find a local supplier for this hose, or can contact the manufacturer Parker Hannifin. The replacement hose would be a 1/2" diameter Parker part number 601-8 or H017-8. To find a local distributor the Parker website can be accessed at Please wait while we redirect...
Use worm type hose clamps (use double clamps on each end) to attach the replacement hose to the existing pipe.
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Old 06-19-2011, 12:26 PM   eBay Motors  #6 (permalink)
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where does it kink?
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Old 06-19-2011, 12:32 PM   eBay Motors  #7 (permalink)
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Right above the trans.
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