'08 LMM towing update above 8,000 ft elevation. - Diesel Place : Chevrolet and GMC Diesel Truck Forums
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > Speciality Forums > Towing
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise

Towing Discuss Anything Related To Towing With Your Diesel. Any RV-specific discussions belong here.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
LinkBack Thread Tools
Old 05-26-2008, 02:54 PM   #1 (permalink)
Join Date: Apr 2008
Posts: 11
iTrader Score: 0 reviews

'08 LMM towing update above 8,000 ft elevation.

Well, 10,000+ miles on the truck and we towed our 11,000# fifth wheeler. We towed for over 2,100+ miles from the Arizona desert up to the Sierra Nevada mountains and into northern CA. We stopped at several places to camp for several nights at a time. We were atop at over 8,000' foot elevations. In fact, I believe we were closer to 9,000' once we got to the top of a mountain just outside of Independence, CA.

After a week up there, we headed north past Mamouth Lakes, CA. Man, talk about a steep steep grade going up Hiway 395 past Bishop, CA. Holy $h!T.

Anyway, the LMM performed beautifully. It really beat out my 2004 F-350 gas engine (work) truck. The towing comparisson between the two trucks can't even be compared. On second thought, yes it can. The Chevy Diesel won, my F350 gasser lost.

My average MPG's over the entire length of the trip was 13.2 MPG's. I really take it easy and never went over 55MPH while on level hiways.

Going up steep hills in the mountains was not a problem. The truck wanted to go faster if I allowed it to with the throttle. But, I didn't. I went through numerous "regens" as far as I could tell, but that was over a 4 week period of refueling and heavy towing. I considered it all "normal."

I used the Mobil "Delvac-1" ESP fully synthetic oil (5w-40) (API: CJ-4) and plan to send off a sample tomorrow for oil-analysis testing. I'll post the results. Also, I have zero "mods" done to the truck. It's bone stock. All of the emissions crap is left in tact. I have to leave everything "as is" due to the fact here in CA, we're being required to have diesels "smog checked" within the next 2 years! (F^#K!!!)

Final Conclusion: The LMM performed flawlessly. Even during hot 100F temps in the desert, the temp gauge remained in the "normal" range. In fact, it didn't really rise above 210F on the temp gauge. The Allison tranny temps stayed under 195F the entire time during the hot desert hill climbs too. Passing semi's and gas engined trucks with trailers up steep hills was down right FUN!

I think the nay-sayers about the LMM's just complain because they've not yet owned one, or they've moded their LMM's to where it caused problems. Just my own opinion.

Last edited by JetA; 05-26-2008 at 02:56 PM.
Reply With Quote Quick reply to this message
Sponsored Links
Old 05-26-2008, 09:05 PM   #2 (permalink)
Diesel Nut
jim87vette's Avatar
Join Date: Nov 2007
Location: Harrisburg,Arkansas
Posts: 916
iTrader Score: 0 reviews

Glad to hear you had a good trip sounds like a success to me!Will have mine Wednesday and I can't stop thinking about it lol!

Chevy 6.5 96 4x4 2500 ext cab
116,509 miles
08 GMC LMM Dually
Dually Club Member # 617
Offline   Reply With Quote Quick reply to this message
Old 05-26-2008, 09:28 PM   #3 (permalink)
Join Date: May 2008
Posts: 61
iTrader Score: 0 reviews

Awesome! Makes me more anxious to pull.
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 05-26-2008, 09:33 PM   #4 (permalink)
RI Chevy Silveradoman
Diesel Prodigy
RI Chevy Silveradoman's Avatar
Join Date: Apr 2006
Location: Rhode Island
Posts: 4,342
iTrader Score: 0 reviews

Ocean State Diesel Club Member

Moved to the Towing Section.
RI Chevy Silveradoman

2006 Chevrolet 2500 HD 4WD CC LT3
LLY Duramax Diesel Allison 6 Spd

Member #1 Ocean State Diesel Club!

Offline   Reply With Quote Quick reply to this message
Old 05-26-2008, 09:47 PM   #5 (permalink)
Diesel Champ
BIGR's Avatar
Join Date: Dec 2005
Location: Rural USA
Posts: 1,518
iTrader Score: 1 reviews

Glad to hear your trip went well. Its nice to hear about reports like this and it only proves that much more that the Duramax is the king of towing.
2006 Silverado LT1 2500HD CC S/B 4X4 LBZ
Graystone Metallic / Dark Charcoal Interior
Matching Century Royal Camper Shell
GM Mudguards
Nasta Step Bars
Ranch Hand Legend Grill Guard
Motor Is All Stock For Now
Offline   Reply With Quote Quick reply to this message
Old 05-26-2008, 11:11 PM   #6 (permalink)
Join Date: Jan 2008
Posts: 106
iTrader Score: 0 reviews

Conway summit outside of Mono Lake - probably claimed its fair share of transmissions and brake rotors.
Thanks for all the good information. Hope you enjoyed the area.

I've had the same experience with towing mpg. Slowing down seems to be the key to getting 13+.

Last edited by BlackMariah; 05-26-2008 at 11:26 PM.
Offline   Reply With Quote Quick reply to this message
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Elevation rhinolite Fuel System, Air, Exhaust, & Emissions Upgrades 0 11-13-2011 07:27 PM
UPDATE to limp mode while towing Tiger8M Duramax Fourth Generation: 2007.5-2010 (LMM) 1 07-17-2009 01:41 AM
6.5 diesel towing update FordguygoneChev 6.5L Diesel Engine 3 08-18-2007 11:24 PM
(Update) Towing with the PPE for LMM Bartman432 Fourth Generation Duramax Electronics/Tuners 11 07-08-2007 09:09 PM
Evo Towing Update on Level 2 SOCALHD Third Generation Duramax Electronics/Tuners 3 04-13-2007 10:58 PM

All times are GMT -4. The time now is 04:53 AM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide