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


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-15-2016, 10:15 PM   #41
4 Rivet Member
 
2015 27' Flying Cloud
Bozman , Maryland
Join Date: Jul 2014
Posts: 294
I have a 2015 Sierra 1500 SLT with the 6.2 liter engine and 8-speed box. Also the max trailer tow package. There are 2 modes to the hill descent control. The more aggressive mode is invoked when you use cruise control; the transmission will start downshifting when you exceed the set speed by 5 mph and will continue to downshift if the vehicle keeps accelerating spinning the engine up to about 4200 rpm. The second mode is less aggressive and kicks in based on some combination of factors that I can't figure out. The nice thing is that when cruise control downshifting happens, applying the service brakes does not trigger an upshift. You can use manual control as well, without fear of over revving. The shift command will be refused if it would cause an overrun.
Regarding the use of "auto" on your 4wd setting, I don't see why that would provide any benefit. In fact, if you're in a low-traction situation (rain, snow), you should be careful about using a lot of engine braking. Use the service brakes instead and slow down a lot. Remember that most newer US-branded trucks with integrated trailer brake controllers include ABS and D.SC. Functions.
I've descended up to 10% grades without incident, using the service brakes as needed and never got them hot enough to smell. That's pulling an FC27.
DC Bruce is offline   Reply With Quote
Old 06-15-2016, 11:07 PM   #42
Rivet Master
 
NevadaGeo's Avatar
 
1978 31' Excella 500
Genoa , Nevada
Join Date: Jul 2007
Posts: 1,554
Quote:
Originally Posted by kscherzi View Post
Why not use the brakes? Brakes, by design, are a wear item and reletivly inexpensive to replace compared to a transmission.
You know the Runaway Truck turn outs over on 80? and there are several of them? And a few on 50 coming down Spooner. Ever see the trucks setting in that gravel? Or see a truck turned over and 80 is closed because he didn't have a Runaway turn out? Comes from inexperienced drivers riding the brakes. Best not descend at a speed where the rig pushes the engine revolutions up, that the compression doesn't hold back the rig.
First sign you have trouble is a warped rotor. Then fading. Maybe you'll see smoke.
Don't light up the forest with a fire from your brakes, not cool. They burn up the hills around Kyburz regularly with brake fires, and cigarettes.
__________________
I admit to being powerless over housecleaning and social niceities
Airforums 22655 and now, WBCCI 22655

NevadaGeo
NevadaGeo is offline   Reply With Quote
Reply

Tags
1500


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
Report on Chevy/GMC 1500 with 6.2 engine and Max tow pack DC Bruce Tow Vehicles 436 03-19-2021 07:22 AM
Equalizer hitch on 2014/2015 GMC Sierra 1500 Denali or SLT runnersg Hitches, Couplers & Balls 2 06-16-2015 12:36 PM
2015 GMC Yukon Denali 4WD & 2015 Flying Cloud 30 ? DHart Towing, Tow Vehicles & Hitches 22 04-09-2015 07:01 AM
2014 Chevy/GMC 1500 6.2L + max tow? DC Bruce Tow Vehicles 87 02-11-2015 07:17 PM
2015 Chevy 2500 LTZ HD vs GMC 2500 Denali HD Roadtech Tow Vehicles 2 10-21-2014 05:47 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 09:52 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.