Jump to content

Thinking of getting a 2500HD

als1984z28

Recommended Posts

als1984z28 Enthusiast

als1984z28

Posted
Posted

I am kicking around the idea of trading in my 05 1500HD on a new 2500HD CC SB, the thing is that the 2500HD with the 6.0 is rated 100 lbs. less than my 1500HD for fifth wheel towing. I am thinking about the 8.1 but is anyone running the 8.1 without the Allison? My campers GVWR is 8500 lbs and the 6.0 pulls is ok but the 8.1 would pull it a lot better.

 

 

 

FYI, I bought it!

New post.

BBSilverado Enthusiast

BBSilverado

Posted
Posted
I am kicking around the idea of trading in my 05 1500HD on a new 2500HD CC SB, the thing is that the 2500HD with the 6.0 is rated 100 lbs. less than my 1500HD for fifth wheel towing.  I am thinking about the 8.1 but is anyone running the 8.1 without the Allison?  My campers GVWR is 8500 lbs and the 6.0 pulls is ok but the 8.1 would pull it a lot better.

 

 

 

 

The 8.1 only comes with the allison in the trucks unless you get the manual tranny. the 8.1 in the Avalance and Suburban only comes mated to the 4L85E.

als1984z28 Enthusiast

als1984z28

Posted
  • Author
Posted
The 8.1 only comes with the allison in the trucks unless you get the manual tranny. the 8.1 in the Avalance and Suburban only comes mated to the 4L85E.

 

 

 

 

Thats what I thought buy why can I "build" a 2500HD on Chevy.com with an 8.1 and I am not forced to add the Allison?

RICH256 Enthusiast

RICH256

Posted
Posted

Thats what I thought buy why can I "build" a 2500HD on Chevy.com with an 8.1 and I am not forced to add the Allison?

 

 

 

 

 

Why don't you want the Allison? I think one of the reasons they require it is that the Allison can handle more torque than the 4 speed.

 

We noted that for 05 the Duramax torque listed for the manual was less than with the automatic. Further investigation showed that the manual transmission had a lower torque rating so they somehow limited the output for it.

Bud Enthusiast

Bud

Posted
Posted
I am kicking around the idea of trading in my 05 1500HD on a new 2500HD CC SB, the thing is that the 2500HD with the 6.0 is rated 100 lbs. less than my 1500HD for fifth wheel towing.  I am thinking about the 8.1 but is anyone running the 8.1 without the Allison?  My campers GVWR is 8500 lbs and the 6.0 pulls is ok but the 8.1 would pull it a lot better.

 

 

 

 

I have a camper that weighs about what your's

does but it is a travel trailer not a fifth wheel. Just my

opinion but if you get the 8.1 you will want the Allison. It

makes towing easy.

JMO

als1984z28 Enthusiast

als1984z28

Posted
  • Author
Posted

Sorry if I gave the wrong impression about the Allison, I guess I was confused on why the Chevy let me build one on their site without it.

Well looks like I'll start looking for a 2500HD with the 8.1. This seems like the best time to trade up, $4500 in rebates for a 2500HD crew cab (excludes Duramax 6600 Turbodiesel) and I have 21,000 miles on my truck and for the first time I owe less on a vehicle than what its worth for trade-in according to KBB.com and edmunds.com.

RICH256 Enthusiast

RICH256

Posted
Posted
Sorry if I gave the wrong impression about the Allison, I guess I was confused on why the Chevy let me build one on their site without it.

Well looks like I'll start looking for a 2500HD with the 8.1.  This seems like the best time to trade up, $4500 in rebates for a 2500HD crew cab (excludes Duramax 6600 Turbodiesel) and I have 21,000 miles on my truck and for the first time I owe less on a vehicle than what its worth for trade-in according to KBB.com and edmunds.com.

 

 

 

 

I thought that selecting an 8.1 would automatically give you the Allison. KBB does.

 

Sounds like a good move to me. I have the feeling that your are at about the limit of your tow capability with that 6L. Of course it is the bigger engine and running gear that give you more pulling power.

 

I like the Duramax. Don't know if it was really worth it, especially with the price of diesel being more than premium gas. I just wanted a diesel. Most all my pulling is in the Rocky mountains regularly going over 12000 foot passes.

 

Just yesterday I had to stop at a GM Dealer and take a close look at one they had in their lot. A modified 4500:

 

http://www.worldclasshaulers.com/4500GMCwi...hWheel-trad.jpg

 

http://www.rvtruck.com/rv_truck_025.htm

  • 2 weeks later...
als1984z28 Enthusiast

als1984z28

Posted
  • Author
Posted

Well, I just left the dealership and looks like I am getting a new truck. They gave me what I wanted for my 1500HD and they are trying to dealer trade a Black 2500HD CC SB 8.1 Allision. It that falls through they found the same truck in the sport red and one in the dark gray but they will have to dealer trade those also. Wish me luck!

mmmikkke Senior Enthusiast

mmmikkke

Posted
Posted
Well, I just left the dealership and looks like I am getting a new truck.  They gave me what I wanted for my 1500HD and they are trying to dealer trade a Black 2500HD CC SB 8.1 Allision.  It that falls through they found the same truck in the sport red and one in the dark gray but they will have to dealer trade those also.  Wish me luck!

 

 

 

Good luck, dude.

 

Just thought you might want to know that the dark gray metallic is discontinued for 2006. So if you wanted a truck in a color that there won't be a zillion of, the dark gray one would be a good choice.

 

Black is always good, though, so if plan-a comes together, cool.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • PhilB
      No 12v outlets in 2026 gmc Sierra

      By PhilB · Posted

      It is possible to add your own 12v outlet to your truck.  Check out this video:   I verified via GM Upfitters that pin 31 is the same on the 1500 trucks.  The wire is GM part number 84779405.   You can get the GM 12v outlet from Amazon  https://www.amazon.com/Genuine-Accessory-Receptacle-25774623-13549530/dp/B0F1H9YRGF EWAY 12 Volt Power Adapter for GM   https://www.amazon.com/EWAY-Chevrolet-Silverado-Cigarette-Ignition/dp/B0915RRW6Q/ref=sr_1_1?   I just haven't figured out a good place to put the 12v outlet in my truck.   Some people are getting USB-C to 12V adapters  https://www.amazon.com/WYMECT-Cigarette-Lighter-Socket-Adapter/dp/B0F87WNQKB/ref=sr_1_1_sspa? Not sure if they provide the correct amperage that a device like a tire inflator would need.  
    • Core-Lokt
      Wiring Help, Please

      By Core-Lokt · Posted

      Thanks; I looked there a few minutes, and I think I can find something. I really never looked there, as I thought it was stuff like PTO/aftermarket bodies/accessories like snow plows.
    • newdude
      2 speed transfer case optional now?

      By newdude · Posted

      This is a 1/2 ton thing ONLY.  All HDs 2020-2026 have the two speed transfer case, with Autotrac as an option.     1/2 tons 2019-2026, regular 4x4s come with a single speed case (no 4LO!), and trucks with Z71 ordered, or all Trail Boss trucks come with the 2 speed case.  2 speed case is also an option on WT, and is also standard on High Country.  
    • newdude
      Different requirements for oil filters?

      By newdude · Posted

      2013 5.3 still to this day calls for the PF48 filter.  Which as a 15psi bypass pressure.     There is a TSB, 17-NA-157 that talks about the PF-63 and PF-64 filters which have a higher bypass rating of 22psi.    TSB HERE - temp.xml   "Beginning in 2012, the oil pumps began to regulate main gallery feedback instead of pump out pressure. This means that the oil pump now does not begin to regulate until pressure is built up to the main gallery. This change reduces the amount of time it takes to provide oil to the engine bearing and lifters during extreme cold start conditions.  Main gallery feedback oil pump control systems are present on the following engine families which use Spin-on oil filters: Small Gas Engine (SGE), Large Gas Engine (LGE), High Feature (HFV6) Gen2 and Small Block Gen5 gasoline engines. These engines with the main gallery feedback oil pump control systems are factory built with an ACDelco® oil filters"   It also calls out what engines use those filters.  The gen 4 small blocks were not on that list (LMG, LC9, L9H, L92, L94, L20, L96).  Gen 5 small blocks use the higher pressure filter.          That all said...   Your 7045 Napa filter is the PF63 equivalent, with 22psi bypass.  You are already using the higher bypass pressure filter.  You CAN keep using it, you don't technically have to use it though.  
    • Grumpy Bear
      Different requirements for oil filters?

      By Grumpy Bear · Posted

      Do you know WHY the filter relief setting was increased to 22 psig?    When the new system goes into the second stage the pump volume ramps up considerably. It was found that the 15 psi filter bypass setting put the filter in bypass on a warm engine when the second stage was activated. Raising the filter bypass setting forced the filter to do what it designed to do. Filter. Preventing debris from circulating during high load, high rpm operation.    So next question is how did GM find this out? VLOM/lifter failures and a deep dive by Melling Corp.    Last question. Is it required? Look at it like this; a motor may be equipped with a rev limiter. But it only works if the set point in reached. That 22 psig setting only matters if the pressure differential across the filter media exceeds 15 psig during normal warm operation. Second stage kicks in around 3000-3500 rpm.    I can't answer your question because I don't know you and how you use the truck. But I think there is enough information here to let you decide for yourself. 😉

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...