New DuraMax

[gillguy]

:D Just brought it home yesterday:D
I have been trying to get diesel informed by reading the info shared on this forum, and have another question. Does my '07 Chevy Classic have the LBZ or LMM?:confused: Doesn't seem to matter now that I got it, but curious just the same. Can't wait to get some miles on it so I can hook up our TT to it and see how much better it tows than my gasser Suburban.
:D

[gillguy]

:D :D :D
I just brought it home yesterday, and put 95 miles on it.
How long did you wait before you started towing with it?
Dealer said 500 miles. I have a 33' foot travel trailer that weights just about 7200lbs loaded. I really don't see why I couldn't pull it now.
Any pros/cons to waiting?

[conway]

Since you have the classic, it is a lbz.

[More Power]

The rear differential is what needs to be broken in. GM recommends changing the rear diff lube after 500 towing miles or 10,000 miles of no-towing. Don't be surprised to find some amount of metal on the magnetic drain plug.

You could tow a 7K trailer for short trips that didn't cause the rear diff to heat to excessive levels. I've seen quite a few brand new trucks tow from the get-go.

Congrats on the new truck! ;)

Jim

[DieselMonk]

and it pulls much better than a 6.0L surburban!:D

[Dakster]

and gets better fuel mileage (at least for me) too. :) I'm getting 50% better mileage (9.9-10.1 vs 14.7 - 15.0). Both figures are running empty and in mostly city driving. I did take a trip on the highway and didn't do much better.

[mark45678]

I agree 100% with what Jim said! the key to getting your new truck tow ready is take a few trips to warm up the the rearend but not over heat things. change the fluid after 300~1000 miles and do it again around 5000 miles. I have been using mobil1 syn gear lube with zero issues. its easy to change , there is a drain and a fill plug so you can do it basicly anywhere . FYI you need 4Qts to fill it.

[gillguy]

We are planning a trip to PA in July. But I should hit the 500 miles before then.:D We will be towing our travel trailer when we go to PA.
Should I change the rearend lube before we go? Or wait until the return home?