Chips2000 As long as you can keep the Dmax cool...My bro (who has a new 05 LLY, called me today and is really worried about the cooling problems some of the LLYs are having according to the forums he visits. There is even talk of a class action lawsuit. Hope it does not come to that.

Hope they get a great lawyer. This problem is interesting, because it seems to affect only a certain number of trucks, in a specific geographic region, and only under certain conditions (long grade, 10K+ trailer weight, ambient temps over 95 degrees). The majority of dealers have yet to see a D-max with an overheat condition. What further complicates the issue is the definition of "overheat." Some owners are claiming their trucks overheated in the 210-235 degree temp range, which is actually the upper limits of "normal."

 

This is surprising...

If the vehicle "overheats" - well then the first things to go would be those alluminium heads.
I am still yet to hear of a problem with one of them.

Also, placing a tuner on an engine would aggravate an overheating concern like you wouldn't believe.

 

Well, I am not sure if it is in his head or his trucks heads ! But I know he was complaining that the fan was very noisey and seemed to come on a lot with an 8K load when the temps were only in the 80s on very modest climbs. Now that the temps are in the 120s, he is more worried. His 8.1 Suburban never had any heating issues and he put thousands of miles all over the western states without a concern pulling 8 to 10k trailers. A bunch of us are going up to the mountains this weekend which will include my 99 PSD pulling 9k, a new King Ranch pulling about 12k, an 02 PSD pulling 9K, and a new Dodge Cummins pulling 8K along with the Dmax pulling 5K. Let you all know how it works out.

Chips2000

 

Of course hes complaining, he bought a GM!

Duramaximizer...I dont need to open my eyes to anything. I know what these engines are capable of. Having that much HP if the truck was to pull anything seems pointless to me. The EGT's would climb very quickly on a good sized hill, or if the ambient temps are high, as Polar mentioned, causing you to back off anyways, unless your an idiot. You all seem to think not. So i'm just going to shut my mouth on this issue. I want GM to prove me wrong with this Duramax. I think it would be very cool to see these kinds of numbers in an all around useable truck. I can't wait to see. I can't wait until '07 when all new diesel engines are introduced. It will definately be interesting...for all manufacturers.

 

will the 6.0 be available in the tahoe as well?

 

Are we talking the 6.0 gas? I'd imagine it will be, although the 5.3 isn't exactly a 90 lb weakling either (runs circles around the current Expy). No diesels in Tahoes- although we might see it in the 3/4T 'Burb. I'm not holding my breath on that one, though.

 

What type of Diesel might you be hoping on?
The Duramax?

 

I saw today 'o6 Durmax: It is unchanged 310HP/605in-lb. Allison is 6 speed...

 

??? I just got production schedule on my first ones this week- 8/15 build dates, and that's Chevy's equivalent of job #1.

 

Dealer in Southern Indiana claims that has one on the lot: no change in power but Allison is 6 speed. Where did you get numbers for increased power.

 

Chevrolet.

They brought their '06 dog-and-pony show to Seattle last week. That dealer needs to re-check his VIN...or I need to re-check my glasses. They're still shipping '05's, although. come to think of it, though, a cotact didmention they ran 80 or so units down the line as pre-production '06's about 3 weeks ago. I assume the truck they brought to Seattle was one of those units.

 

It is definitely a bit early for 06s.

 

I thought August was always the month for next years models

 

August is typically the month for new models- unless you're in the corvette biz (September will be the changeover).

As a follow-up on the D-Max- initial '06 build will be the current motor, the change will happen mid/late October (code LLZ). The 6-Speed Allison will be on all '06's.

 

diesels will run hotter not that I care.

The truck pullers seem to see 1800 degrees EGT and don't give a RIP.

1500 would be the point at which I would tune back the power. the newer programers have gauges so they will tell you when the EGT (exhaust gas temps) reach a preset level and then an alarm will go off.

ex. my cousin has a chipped dmax and ran the 90 hp level while pulling a large 5th wheel and the EGT alarm went off at the top of the hill was when it hit the 1500 degree mark so he never let out of it.

these truck IMO are better equiped to handle the high temperatures. all of our oil and everything else just does a better job I think. (When you modify anything, you have to get guages. after that, pour the coals to it.)

I personally think the dmax has proved itself and will continue to do so.

400 hp in a truck is practical and useable ( at least for the dmax)

i won't worry about overheating until i see the guage in the red. if it is not red, i don't worry about it.

if you want to see a burried temperature guage look at my dad's bulldozer, it "normally" runs right on the edge of HOT and never goes above that mark. i think HOT is like 280 on that guage.

it is a 1972 model and has a tuned pump on it and I might get it tuned again to keep up with the '96 dad runs

if the pickup reaches 280 i would prolly pull over and let it cool off a little.

230 is peanuts to anyone that knows heavy equipment.

BTW the oil is NOT burnt and we know what to look for when you check the oil