LB7 HP & Torque Specifications - Chevy and GMC Duramax Diesel Forum
01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect

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Old 09-06-2013, 01:43 PM   eBay Motors  #1 (permalink)
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LB7 HP & Torque Specifications

Hello all,

In my post about Turbo lag, the subject of LB7 HP (mysteriously) came up and someone thought the correct number might be 235 (!). All sources here on the Forum agree 300 HP is correct, but I was curious where 235 came from as well as where I could find a number for LB7 HP from outside our own experts ("Trust and verify"...R. Reagan).

A Google of LB7 specifications popped up this hit in the #1-3 positions...and it's wrong :

6.6L Duramax LB7 Specs

Wikipedia got it right:

Duramax V8 engine - Wikipedia, the free encyclopedia

but when the first three Google hits show BS numbers, it's not too hard to see how bad 411 got picked up and spread across the interweb. While I suppose we could come up with some humorous reasons to let people think we only have the lower number, the cat would be out of the bag as soon as they saw our rear bumper disappear down the road .

Another fact in the Wiki article that could be updated, GMC just built the 1,500,000 Duramax last fall:

Southwest Ohio plant reaches 1.5 million engines

Why am I always the last one to find out this stuff?

And yes, I do have a lot of time on my hands...

Finally, here's what the folks at GMC had to say today:

Service Request: 71-1222428969
Customer Relationship Specialist: Ivan


Dear Steve,


Greetings from the GMC Customer Assistance Center!


Please consider this as an acknowledgement of your request for an email to be sent to you regarding your inquiry for the Horsepower and Torque for the LB7 engine you have on your 2003 GMC Sierra HD.


We have looked up the information and the Horsepower(hp/kw@rpm) : 300 / 224 @ 3000 and the Torque (lb-ft/Nm@rpm): 520 / 705 @ 1800.
In addition, this file will be documented under Service Request number 71-1222428969. Again, thank you for contacting us here at GMC.


If you should need to contact us in the future, simply reply to this message or call our GMC Customer Assistance Center at 1-800-462-8782. Customer Relationship Specialists are available Monday through Saturday from 8:00 a.m. to 9:00 p.m., Eastern Time.


Check out the GMC Owner Center at www.my.gmc.com. Manage your service history, maintenance schedule, warranty details, and more with this new, more comprehensive owner resource. Registration is free


Again, thank you for contacting GMC.


Sincerely,


The GMC Consumer Support Team

..................

Best wishes
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Old 09-06-2013, 02:07 PM   eBay Motors  #2 (permalink)
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Good info my 2001 LB7 states 300 HP on a tag on the drivers side valve cover.
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Old 09-06-2013, 03:21 PM   eBay Motors  #3 (permalink)
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LB7 235 @ 2700 rpm. (2001)
300 @ 3100 rpm (2004)

Torque 500 lbs@ 1600 rpm (2001)
510 lbs @ 1800 rpm (2004)


Sent from AutoGuide.com Free App
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Old 09-06-2013, 03:42 PM   eBay Motors  #4 (permalink)
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Doh...!

Quote:
Originally Posted by mray View Post
Good info my 2001 LB7 states 300 HP on a tag on the drivers side valve cover.
Just went out and found my tag.

Could have saved myself time slaving over a hot keyboard if I had just got a mirror, flashlight, damp cloth to clean the tag, hung by my toes from the hood and read the tag myself .

I'll do my homework next time .

Best wishes
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Old 09-06-2013, 04:38 PM   eBay Motors  #5 (permalink)
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Hey stevewaclo
This is were I got my info, its on the www so its has to be right lol
6.6L Duramax LB7 Specs
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Old 09-06-2013, 04:58 PM   eBay Motors  #6 (permalink)
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All LB7's are 300 crnak HP


GM customer care doesn't know jack.
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Old 09-06-2013, 06:00 PM   eBay Motors  #7 (permalink)
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Quote:
Originally Posted by lowstroke23 View Post
All LB7's are 300 crnak HP


GM customer care doesn't know jack.
x2 ^^^^^
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Old 09-06-2013, 06:09 PM   eBay Motors  #8 (permalink)
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Talking GM or GMC?

Quote:
Originally Posted by lowstroke23 View Post
All LB7's are 300 crnak HP


GM customer care doesn't know jack.
Sounds like you may have had a bad experience with GM Customer Care .

The GMC folks agree with you!

"Please consider this as an acknowledgement of your request for an email to be sent to you regarding your inquiry for the Horsepower and Torque for the LB7 engine you have on your 2003 GMC Sierra HD.

We have looked up the information and the Horsepower(hp/kw@rpm) : 300 / 224 @ 3000 and the Torque (lb-ft/Nm@rpm): 520 / 705 @ 1800."

Best wishes
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Old 09-06-2013, 06:30 PM   eBay Motors  #9 (permalink)
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Yup 300
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