GMC Dmax fuel fill

[Jvann]

Stopped at local truck stop for fuel the other day. I noticed a GMC Dmax pulling up to a pump next to me. He had a mid 20 ft. TT in tow. After a couple of minutes fumbling around with the hose (all of them are the big hoses) he started looking around at the pumps up at the car islands. Then he came over to me and asked if there were any small hoses with diesel at this station. I showed him one and he proceeded to try to manuver his camper between the cars and blocked most of the exit. He said "this darned thing just won't take fuel from one of the big hoses". I thought what a pain it would be to have to find a small hose with a camper in tow. I don't know if the filler hole is too small or the tank setup won't take the volume. He didn't say and I didn't ask as he seemed to be aggravated enough. He knew what I was thinking----Shoulda bought a Dodge!

 

[DarrellB]

My uncle Ron and buddy Ryan both have the same trouble. They say that they can use the big nozels but can only put the pump on the first notch, which means it takes for ever to fill up. They said that the big nozels cover up the vent for the tank and it causes the diesel to foam really bad and then trips the pump. So they both try to avoid the stations with big nozeled pumps. I have used the big nozeled pump 95% of the time on my 99 and have had no problems but a former imployer of mine had to rplace 4 sending units in his 97 and the dealer told him it was because he used the large nozeled pump. They said the pumps create too much presure and damages the sending units.



Big Nozels Rock

Big D

 

[Jvann]

Might be a good idea to set nozzle at about half open to be sure it doesn't cause a problem. Anyway it's nice to have the option to use a big nozzle if you're pulling a camper or trailer because they are usually easy to get to pull thru pumps. Didn't intend to knock the man's truck as it was a very nice truck but you would think GM would consider what's in the real world when designing a fuel tank. But then again maybe they wouldn't. They have been known not to (I've owned several GM trucks). Their attitude is if we put our name on it, it will sell no matter what. I don't like that attitude. Anyway thanks for the info on the sending unit.

 

[DarrellB]

Lvann, I've been trying to remember to only use the pump at half trottle but it's a bad habbit to just pull her back and leter eat.



Bomb on Brother

Big D

 

[Jvann]

I agree it's hard not to crack the throttle on that pump especially if you're in a hurry.

 

[DHess]

I had the same experience with a guy trying to fuel a duramax - the big nozzle only goes into the filler about an inch or so. Probably the same filler neck they use on their gassers.



When I fill mine with the big nozle, I use the first notch (lowest flow). Gives me time to get the windshield and the fuel doesn't foam as much - makes topping off a little easier.



Dave

 

[Texas Diesel]

Originally posted by DHess

Probably the same filler neck they use on their gassers. Dave

Mother Goodwrench has been famous for decades for using off-the-shelf components, even when they are obviously not good enough. It seems to save them $ when they stop production of dog vehicle lines. Perhaps if they would *try* and use good engineering designs during R&D they wouldnt have to drop so many vehicle lines. It almost seems that gm's approach is to get something on the sales floor any way possible and then *IF* it sells *THEN* they will try to fix the bugs and such.

 

[B9Mile]

Like a Rock !!

As Jvann stated. . . . "you would think GM would consider what's in the real world when designing a fuel tank. "



I can't help but think of the tired and worn out commercials... . LIKE A ROCK!!"



Seriously though, I prefer the large nozzles for filling the Cummins and also my Jetta TDI. By using a 20% to 30% flow rate, the large nozzles produce less foaming than the smaller nozzles. When I'm almost finished topping off, the large nozzle will dribble with minimal foaming.