Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > TRAVEL TRAILER, 5th WHEEL & TRUCK CAMPER FORUMS > Trailer Towing and Tow Vehicles Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 07-04-2022, 06:33 PM   #1
Senior Member
 
TexasTwoStep's Avatar
 
Excel Owners Club
Join Date: Oct 2009
Location: Beaumont, TX
Posts: 957
Towing in mountains

2022 Duramax hd 3500 dually /16k 5th wheel

So I understand when descending steep grades the truck should be in drive, cruise control, tow haul with exhaust brake on. Is this correct? On older models I never used the cruise control.
TexasTwoStep is online now   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 07-04-2022, 07:05 PM   #2
Senior Member
 
Join Date: Mar 2021
Posts: 388
Reference this manual: https://www.chevrolet.com/content/da...-ebrochure.pdf

On page 12 is reads. "Cruise Grade Braking Standard on Silverado 1500 LTD, Silverado 1500, Silverado HD, Suburban and Tahoe, Cruise Grade Braking is enabled when cruise control is active. It assists in maintaining driver selected speed when driving on downhill grades by using the engine and transmission to slow the vehicle."

-and-

"Tow/Haul Mode Grade Braking Included on Silverado 1500 LTD, Silverado 1500, Silverado HD, Suburban and Tahoe, when Tow/Haul mode is enabled, it assists in maintaining desired vehicle speeds when driving on downhill grades by using the engine and transmission to slow the vehicle."
gjames50 is offline   Reply With Quote
Old 07-04-2022, 09:21 PM   #3
Senior Member
 
Join Date: Jan 2019
Posts: 252
You will still get the braking without cruise control by tapping the brake but you are right, I set the cruise at 5mph less than I want to go because the truck will go 5mph over the cruise setting before it kicks in.


You are wasting your time and effort if you try to down shift in the manual setting. Your RPMs will go thru the roof but you get no braking.


Happy travels.
__________________
Doug & Melba
2014 GMC dmax, crew, dually
2015 DRV Tradition
00 Buckshot is offline   Reply With Quote
Old 07-05-2022, 07:32 AM   #4
Senior Member
 
Join Date: Apr 2020
Posts: 1,480
You can quickly go through a set of brakes when driving through the mountains with cruise on. Older vehicles did not brake in cruise control mode going down hill but newer ones do.
move on is offline   Reply With Quote
Old 07-05-2022, 07:39 AM   #5
Senior Member
 
Join Date: Apr 2021
Location: DFW
Posts: 1,256
I thought the diesel exhaust engine braking mode operated anytime the TOW/HAUL mode was activated.

Follow the manual, these newer vehicles have too much electronics to second guess them.
__________________
2020 Chevy Silverado 1500
Forest River Wildwood XLite 263BHXL
carybosse is offline   Reply With Quote
Old 07-05-2022, 11:07 AM   #6
Senior Member
 
Join Date: Apr 2021
Posts: 233
I don't use cruise going down hill. Touch the brake pedal at the speed you want descent and exhaust brake and tow/haul will hold the speed. There was a test on the Ike Gauntlet (7% 8 mile grade at 11,000 ft. 16,000 trailer) where the truck went down the grade at 50 MPH + or - with only 2 brake applications and no cruise.

I went off of the Mogollon Rim on I-17 in Az. at 55mph using this method and never touched the brakes after the initial application. This is 10 or so miles of 6 to 7% grades and I was towing a 16,000 toy hauler.
Bill Nourse is offline   Reply With Quote
Old 07-05-2022, 04:30 PM   #7
Senior Member
 
beerdude's Avatar
 
Tiffin Owners Club
Texas Boomers Club
Join Date: Nov 2020
Location: Springtown, TX
Posts: 206
Quote:
Originally Posted by TexasTwoStep View Post
2022 Duramax hd 3500 dually /16k 5th wheel

So I understand when descending steep grades the truck should be in drive, cruise control, tow haul with exhaust brake on. Is this correct? On older models I never used the cruise control.
That's how I tow with mine, granted mine is previous generation. If twisties are involved with the decent, though, then I turn off cruise and quick brake taps will commence engine braking good enough as Buckshot noted earlier.
__________________
2021 Vanleigh Vilano 320 GK
2018 GMC Sierra 3500HD SLT Duramax 4x4 CCSB
beerdude is offline   Reply With Quote
Old 07-05-2022, 04:34 PM   #8
Senior Member
 
Join Date: Oct 2015
Location: Washington
Posts: 1,569
It depends on the type of roadway you are on.

Mine is a 2016 not 2022.

If I am towing a heavy load, my exhaust brake switch is always on and I am typically in tow/haul mode.

If I am on the highway I will set my cruise at the speed I want to go. It does not matter the terrain. Uphill, downhill, etc and the truck will maintain that speed.

If I am on back roads, typically county roads, where a set seed is not appropriate, I do not use my cruise.

I have since upgraded to a bigger truck and use the 3 speed jake brake.
__________________
2014 Volvo 630 Tandem 2016 Chevy 3500 DRW, crew cab
2016 Fuzion 325T
675ah AGM, MSH 3012 inverter, 1400w Solar
Nwcid is offline   Reply With Quote
Old 07-05-2022, 06:26 PM   #9
Senior Member
 
Rhagfo's Avatar
 
Join Date: Aug 2013
Posts: 1,303
Well not sure about GM, we have a Ram with likely the best EB in the industry. I use mine all the time towing or not, but when in T/H it becomes very aggressive. I set it on Full, and if cruse is on it will hold speed. If cruse is off and I lift off the throttle it will attempt to bring the rig to a near stop.

If you have adaptive cruise if the EB can’t maintain the speed it may apply the service brakes a bit to help slow.
__________________
Russ & Paula, Portland, OR. The Beagle Belle.
2016 Ram Laramie 3500 DRW Aisin 4X4 14,000# GVWR.
2005 Keystone Copper Canyon 293FWSLS Rear Kitchen 12,360 GVWR
Rhagfo is offline   Reply With Quote
Old 07-05-2022, 06:30 PM   #10
Senior Member
 
Rhagfo's Avatar
 
Join Date: Aug 2013
Posts: 1,303
Quote:
Originally Posted by move on View Post
You can quickly go through a set of brakes when driving through the mountains with cruise on. Older vehicles did not brake in cruise control mode going down hill but newer ones do.
Not with a diesel with EB in operation.
__________________
Russ & Paula, Portland, OR. The Beagle Belle.
2016 Ram Laramie 3500 DRW Aisin 4X4 14,000# GVWR.
2005 Keystone Copper Canyon 293FWSLS Rear Kitchen 12,360 GVWR
Rhagfo is offline   Reply With Quote
Old 07-05-2022, 06:43 PM   #11
Senior Member
 
Rhagfo's Avatar
 
Join Date: Aug 2013
Posts: 1,303
Quote:
Originally Posted by gjames50 View Post
Reference this manual: https://www.chevrolet.com/content/da...-ebrochure.pdf

On page 12 is reads. "Cruise Grade Braking Standard on Silverado 1500 LTD, Silverado 1500, Silverado HD, Suburban and Tahoe, Cruise Grade Braking is enabled when cruise control is active. It assists in maintaining driver selected speed when driving on downhill grades by using the engine and transmission to slow the vehicle."

-and-

"Tow/Haul Mode Grade Braking Included on Silverado 1500 LTD, Silverado 1500, Silverado HD, Suburban and Tahoe, when Tow/Haul mode is enabled, it assists in maintaining desired vehicle speeds when driving on downhill grades by using the engine and transmission to slow the vehicle."
The OP is driving a 3500 diesel with an exhaust brake, not a gas 1500!
__________________
Russ & Paula, Portland, OR. The Beagle Belle.
2016 Ram Laramie 3500 DRW Aisin 4X4 14,000# GVWR.
2005 Keystone Copper Canyon 293FWSLS Rear Kitchen 12,360 GVWR
Rhagfo is offline   Reply With Quote
Old 07-05-2022, 08:23 PM   #12
Senior Member
 
Join Date: Mar 2017
Posts: 1,307
TexasTwoStep, congrats on the new truck! What youíre planning is perfect. The exhaust brake paired with cruise control makes towing in the mountains so easy. Youíll love that truck.
FWIW , I have a 2018 Duramax.
__________________
It ainít camping unless you have a microwave.
Yosemite77 is offline   Reply With Quote
Old 07-06-2022, 04:10 AM   #13
Senior Member
 
TexasTwoStep's Avatar
 
Excel Owners Club
Join Date: Oct 2009
Location: Beaumont, TX
Posts: 957
Thanks for the responses.
__________________
GARY
2022 Duramax LTZ 3500 4x4 drw//2021 Van Leigh Beacon 34RLB//Magnum MS 2012 inverter/charger/4- T105's/Trimetric/Tristar//B&W 3000//TST tire monitor
TexasTwoStep is online now   Reply With Quote
Old 07-07-2022, 02:42 PM   #14
Senior Member
 
Join Date: Dec 2006
Location: Foxboro Ma.
Posts: 902
tow haul , exhaust brake on and driving with your foot will get the best fuel economy and safer driving down hill. Its best to be proactive before you come to a hill and a few hundred feet before the hill give it just a little power so it builds boost early . If you let the cruise drive for you it waits for it for drop 2 mph, then adds the fuel by the time the boost comes on you have dropped 3~4 mph and it adds a ton of power to make up for the lost speed. at the top of a long down hill let off befor the crest and then let it slow down 1or 2 mph before the top and if needed tap the brakes lightly once and let the engine down shift to hold the load , 3500 rpm or more is safe and nothing to be concerned about going down hill.
__________________
2015 42' Redwood RL38 Morryde IS , disk brakes, 1920W of solar with Victron everything,Battleborn, 2020 GMC DRW 3500HD Hensley BD5 air ride hitch
xc-mark is offline   Reply With Quote
Reply

Tags
tow, towing



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Towing in the mountains LouRobin Expandables, Hybrids, & Lightweights Discussion 11 11-24-2012 09:32 PM
Question on Towing with Gas Class A in Mountains charlie121 Class A Motorhome Discussions 71 10-13-2011 07:47 PM
Towing a 4900 lb SUV Over The Mountains jimperez Class A Motorhome Discussions 15 09-24-2011 03:22 PM
Towing in mountains floridarvfam Trailer Towing and Tow Vehicles Discussion 19 03-06-2011 04:55 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 06:49 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.