Demi
Is your sig correct that you 5th wheel is 21k lbs dry? If so that is way over the towing capacity of your truck and contributing to (or causing) your hot fuel problem.
Jay
Printable View
Demi
Is your sig correct that you 5th wheel is 21k lbs dry? If so that is way over the towing capacity of your truck and contributing to (or causing) your hot fuel problem.
Jay
The fuel cooler is a small radiator under the truck just forward of the fuel tank.
Demi,
I agree with Cabletech, if your trailer is 21k # you do NOT have enough truck to pull it or stop it. The total weight of your truck and trailer would be 29k to 31k #. Your truck appears to be similar to my 2006, CC, Dually and it is rated to haul (truck & trailer) 24k #. I think you just added the truck weight to the trailer weight in your signature (I hope). If your truck and trailer weigh around 24k # you should be OK. If you are actually running a total combined weight around 30k # you have far exceeded the design limits of the truck and that is likely the cause of your problem.
Last week I posted a suggestion to pressure wash the fuel cooler and to run as much fuel in your tank as possible and see if you were still setting the P0087 code. To wash the fuel cooler go to a self operated car wash. Then lay on the ground and spray the one foot square radiator looking thing mounted under the bed behind the drivers side of the cab. When you think it is clean spray it some more. I always am impressed by the amount of dirt that is left on my driveway when I clean the cooler. Additionally, experiment by topping off your fuel tank when it gets down to 3/4 full capacity for a travel day or two and see if it helps with the P0087 code problem. On a diesel motor part of the fuel that is pumped to the motor returns hot to the fuel tank and the full fuel tank will help to absorb the heat from the returning fuel.
I hope things start working a little better for you with the truck. You indicated you were in the Tucson area and I would suggest that you camp at the Kartchner caverns state park (I10 & SR 90) and take day trips to Tombstone and Bisbee. The caverns are great, Tombstone is fun and my family really loved the mining car ride into a 100 year old mine in Bisbee.
If you do weigh around 30k # be very careful in the Az mountains. I am very cautious and I have still had my brakes smoking on these hills.
Good luck & safe travels
John
I was wrong about the info on the dry weight. Apparently it's only ~14,500. So that is not the issue. Sorry about that guys, I was getting incorrect info from somewhere.
>>"Last week I posted a suggestion to pressure wash the fuel cooler and to run as much fuel in your tank as possible and see if you were still setting the P0087 code. To wash the fuel cooler go to a self operated car wash. Then lay on the ground and spray the one foot square radiator looking thing mounted under the bed behind the drivers side of the cab. When you think it is clean spray it some more. I always am impressed by the amount of dirt that is left on my driveway when I clean the cooler. Additionally, experiment by topping off your fuel tank when it gets down to 3/4 full capacity for a travel day or two and see if it helps with the P0087 code problem. On a diesel motor part of the fuel that is pumped to the motor returns hot to the fuel tank and the full fuel tank will help to absorb the heat from the returning fuel."
Totally agree with the hot fuel issue. We added "Kill'Em" to the tank today per the mechanic's suggestion. I don't expect anything to happen. We are staying in Tucson for a few weeks so if we don't have any issues with fungus, etc. in the fuel lines then we plan to clean the fuel cooler REALLY WELL as you suggested. We're doing one thing at a time so we can be sure what action fixed the issue. We leave Tucson at the end of the month so I'll be reporting back then to let everyone know how cleaning the fuel cooler helped on our drive to Malibu, CA.
Thanks, D
2008 Silverado - 3500 HD DRW (189k miles - symptoms since ~115k - purchased at 105k)
*We've had the GM bulletin PIP4526 collapsing fuel line issue addressed already.
*Towing a 2012 Dutchman Voltage 3900 (7.25 tons dry)
First off, thanks to everyone who contributed to this discussion. I believe it has at least some good workarounds, and likely, the real solution to the problem. I am towing a 14,500# res style 5th wheel purchased last April from Southern California. Towed it home through the Rockies and over Loveland Pass with no problems. It was still cold in the Rockies and snowing much of the trip, but warm on the flat desert of southern California/Nevada. Then in August, back over Loveland for camping, and home over Berthoud Pass. The truck did warm up climbing Loveland that time, but no codes, just needed coolant.
My truck is down right now. I am in DesMoines trying to get home to CO. We left CO in March, for work at Perry Nuclear Plant outage in NE Ohio. After outage it was off to PA for a vacation with family. The trip out there went smoothly with the late/cool spring.
We left PA June 9th. Climbing a good hill mid afternoon in western PA, I got my first check engine/limp mode and the temp gauge indicating the the coolant was warming up. Googled up the manual limp mode reset and got back on the road in an hour. Happened again after 40mins, climbing again. Did the manual reset, and decided to look for a stealership. Pulled into the next town which didn't even have a dealer, or a parts house, but did have 2 bay diesel shop for big rigs, and a mechanic who drove a '07 Dmax classic with a programmer. He came over, pulled the 87 code, reset, and said "Must've gotten dirty fuel, get a fuel filter". Off to napa. It clouded up, started to rain, got to napa, installed new filter. Made it to northern MI the next evening to visit more family, without any more trouble. Problem solved?
We left MI on the 15th stopping in Minooka, Il for the night, still no problems. Headed west in the morning hitting the hills in eastern Iowa by early afternoon. Yup, code/limp/pull over/manual reset at Coralville. Pulled off thinking "that was some really bad diesel, if it crapped up another filter that fast." Went to O'reilly's, picked up AC Delco filter, installed and back on the road in little over an hour. Hit the road and noticed check engine was OFF?? Hmmm? Drove a while, got another check engine/limp/pull over/manual reset and each time the coolant temp has climbed, once near red line. It's not the filter, I need a mechanic.
Got it into DesMoines, set up the camper at Adventureland, and took the truck to Bob Brown GMC the next morning. They did not want to hear the details. Their attitude... "Just leave, we'll figure it out and let you know." I get a call..."You need new HP fuel pump, two fuel rails, and 8 new injectors. A ceramic ball valve in the pump is failing and ruined the entire fuel system after the pump. And oh, you have a head gasket leak that we can fix while we're in there for just over $12k." Yea, I'll be getting a second opinion, and if that's the truth, a new motor. They quoted me just over $19k for the new motor. Next stop, West Side Diesel Repair.
They confirmed the HP pump diagnosis, dispelled the leaking head gasket, and agreed to replace the pump, coolant system chemical flush, fuel system clean/flush, and agreed that without one single symptom associated with injector failure presenting, fix those if/when symptoms say to.
Got the truck back first thing Friday morning. Hit the road at 11. Made it 20 mins west of DesMoines (and I was pushing/testing) and we were turning back after another manual reset. Waiting until Monday for them to resume but I am pushing the collapsed fuel line angle, and once they fix that and/or whatever else they come up with, I will be heading to a car wash to do the fuel cooler clean you all recommend, and trying again. Keep you posted....
Jeff,
First let me welcome you to the Diesel Page. I am sorry to hear about the troubles with your truck. It appears that you have read the posts about the P0087 code and know that there are a lot of theories about the cause. If you do find a definite cause please post it for others to draw help from.
It would help if you posted detailed specifics about your truck. The year, motor, any programers, mods like larger tires or exhaust.
It is clear that there are a lot of people with the P0087 problem, because over 30k people have read this thread. Does anyone at GM customer service on line reading this have any ideas? I am not beating up on GMCS it just seems that this is a big problem with the Duramax in hot weather. The only thing that gets more hits on the DP seems to be the injector failures on the LB7 Dmax. GM should be doing research and putting out service bulletins.
Good luck and keep us posted
John
Thanks for the welcome.
I own a 2006 GMC 2500HD, LLY tune, and aside from airbags to level it, it is bone stock. I bought the truck Aug of 2011 with 189k miles. Traveling for work to the east and south, it now has 228k. I run 265's rather than the 245's but this is insignificant and it is absolutely ferocious... when not towing!
I will keep the forum posted of the outcome whether it is resolved or not. The thought of trading it is crossing my mind, but for what? They ALL have their own problems. Don't want to drive a Freightliner...
Making sure the fuel cooler is clean is a good step, and the AllData site also suggests making sure the fuel heater (if equipped) is not stuck in the ON position.
What is the process for determining it is eqiupped and checking?