Reply
 
Thread Tools Display Modes
Old 06-24-2015, 03:42 PM   #1
Blog: RVroadtripper.com
 
hbillsmith's Avatar
 
Join Date: Jul 2012
Location: Near Dallas Texas
Posts: 980
Trip Report: 2015 GMC 2500HD Diesel/Allison Exhaust Brake and Hill Descent

In case anyone is interested, thought I'd throw out a little feedback on my latest experience with a new GMC 2500HD Diesel/Allison. Bought the truck last summer and picked up the new 5er (Wildcat 295RSX) this spring. Currently on a 2000 mile round trip from Dallas to Moab Utah, Pagosa Springs Colorado and Cloudcroft New Mexico.

Started with a CAT weight and my GVWR, GCWR, RAWR, FAWR, Payload and Tow Cap are all within Spec and safety margins between 10% to 17%.

This is my first tow into the mountains and canyons. My first pleasant surprise is how well the Diesel Exhaust Brake option works. Fantastic! I leave it on and manage speed with my cruise control. The EB kept me in control without hardly ever having to press the brake pedal.

My second pleasant surprise was how well Descent Control works. I had never used before but decided to give it a try as we descended down into Palo Duro Canyon. A 16% grade with sharp switch backs, recommended speed was 15mph. I flipped the Hill Descent Control lever and the console instructed me to slow speed to below 10mph (which I did). As soon as I fell below 10mph, the Hill Descent icon started flashing on the console and the truck took over management of the accelerator and brakes. All I had to do was steer. 10mph may seem like extremely slow but on narrow cliff roads it was plenty fast enough. My 5er followed the truck and all and all it ended up being a very easy descent. Once I reached to bottom of the canyon, I pressed the accelerator and Hill Descent turned itself off. I made it down with no overheating, no gear grinding, no problems.
__________________
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 235/80/16E; AirBags w/AirLift1; mor/Ryde Rubber Pinbox; Andersen UltimateII Alum. 5erhitch on Reese Flipball w/Curt 4" offset; LCI Ground Control3; King Dishtailgater; Traveling with 10' Portabote;
hbillsmith is offline   Reply With Quote
Old 06-24-2015, 04:20 PM   #2
Phat Phrog Stunt Team
 
TURBS's Avatar
 
Join Date: Aug 2011
Location: Iowa
Posts: 34,498
Saaaaweeet!

TURBS
08 duramax tuned n modded
2011 32bhok Sabre
2015 camping "11 nights"
TURBS is offline   Reply With Quote
Old 07-13-2015, 10:54 AM   #3
Member
 
Sydvero's Avatar
 
Join Date: Jul 2014
Location: Texas
Posts: 44
You gotta love those chevy's!
Sydvero is offline   Reply With Quote
Old 07-13-2015, 11:00 AM   #4
Georgia Rally Coordinator
 
aceinspp's Avatar
 
Join Date: Jun 2015
Location: GA
Posts: 17,112
Ya I love mine and it's not even a diesel Later RJD
__________________
2020 Shasta Phoenix SPF 27RKSS
2018 Dodge Ram 2500 6.4 3:73 gearing. Traded 2015 Chevy 2500 6.0, 4:10
Traded 2015 30WRLIKS V-Lite
Days camped 2019 62
Days camped 2020 39
aceinspp is offline   Reply With Quote
Old 07-13-2015, 05:00 PM   #5
Phat Phrog Stunt Crew
 
elind's Avatar
 
Join Date: May 2012
Location: Upper Penisula Michigan / Arizona
Posts: 2,712
I used my Allison tow mode & exhaust brake in Colorado in May and love it coming across the 11,000 ft passes. DW was freaking out because I wasn't riding the brake. Just took awhile to figure it out.
__________________
Ed & Ruthann / Toby and Tucker
2014 GMC Sierra Crewcab 2500 Duramax
2014 Wildcat 327ck
elind is offline   Reply With Quote
Old 07-15-2015, 05:36 PM   #6
Member
 
Claude002's Avatar
 
Join Date: Jul 2013
Location: Lac Des Plages QUEBEC
Posts: 72
hbillsmith
Have aprox. the same weight as you 10,000 lowded up, (Crusader 290) and same truck, can you tell me at what level your brake controler is.
Thanks
__________________
CEDAR CREEK CRF34RL (CUSTOM)
2015 GMC DENALI HD DURAMAX/ALLISON
TIMBREN SUSPENSION SYSTEM
HENSLY BD1 HITCH
MODIFY REAR LIVING(OFFICE)
Claude002 is offline   Reply With Quote
Old 07-15-2015, 07:06 PM   #7
Blog: RVroadtripper.com
 
hbillsmith's Avatar
 
Join Date: Jul 2012
Location: Near Dallas Texas
Posts: 980
I've been using it at 4 1/2
__________________
2016 Wildcat 295RSX - 2015 GMC 2500HD DblCab Duramax/Allison 4x4 Z71 6.6' Bed
Maxxis 235/80/16E; AirBags w/AirLift1; mor/Ryde Rubber Pinbox; Andersen UltimateII Alum. 5erhitch on Reese Flipball w/Curt 4" offset; LCI Ground Control3; King Dishtailgater; Traveling with 10' Portabote;
hbillsmith is offline   Reply With Quote
Old 07-15-2015, 07:18 PM   #8
Member
 
Claude002's Avatar
 
Join Date: Jul 2013
Location: Lac Des Plages QUEBEC
Posts: 72
Your lucky i'm at 7 at 41/2 I can't even fell any brakes and they are not used up, only 7500 miles on the rv brakes, the truck as 800 miles,thanks for the input, I was thinking of raising to 7.5 but wanted to confirm with someone with the same weight before changing, I guess I should be ok.
Regards
Claude
__________________
CEDAR CREEK CRF34RL (CUSTOM)
2015 GMC DENALI HD DURAMAX/ALLISON
TIMBREN SUSPENSION SYSTEM
HENSLY BD1 HITCH
MODIFY REAR LIVING(OFFICE)
Claude002 is offline   Reply With Quote
Old 07-15-2015, 07:30 PM   #9
Member
 
Claude002's Avatar
 
Join Date: Jul 2013
Location: Lac Des Plages QUEBEC
Posts: 72
Hbillsmith
Sorry forgot to mentioned about your experience about the exaust braking system, sounds terrific, living in the East dont think I will ever use it, no Mountains just Hills, but it was interesting to learn what the Truck is capable of doing without sttruggling.
__________________
CEDAR CREEK CRF34RL (CUSTOM)
2015 GMC DENALI HD DURAMAX/ALLISON
TIMBREN SUSPENSION SYSTEM
HENSLY BD1 HITCH
MODIFY REAR LIVING(OFFICE)
Claude002 is offline   Reply With Quote
Old 07-15-2015, 08:51 PM   #10
Who Dares, Wins
 
doc73's Avatar
 
Join Date: May 2012
Location: Chester County, PA
Posts: 6,644
Have my brakes set to 6.5 I think. Just towed through western PA and loved the EB. You might be surprised how much you use it. When getting off the highway and into rest stops and such I never needed to even touch my brakes, truck stopped with just the EB practically. I'm around 9500 or so in my best guess.

Sent from my SAMSUNG-SM-G870A using Tapatalk
__________________

Pat, Jen, Heather & Sapphire, the head mouser.
2015 ChevyHD D-Max
2018 Artic Wolf 315tbh8
doc73 is offline   Reply With Quote
Old 07-15-2015, 08:56 PM   #11
Site Team
 
Platokidd's Avatar
 
Join Date: Aug 2012
Location: top side land of Lincoln
Posts: 7,370
Quote:
Originally Posted by sydvero View Post
you gotta love those chevy's!
and how x2
__________________
2014 LaCrosse 323RST-TE-C
2009 Chevy 2500HD Z71
Seasonal

R.I.P. Luke the campin dog
Platokidd is offline   Reply With Quote
Reply

Tags
500, diesel, brakes

Thread Tools
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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 02:37 AM.