Just took delivery of a new gmc 3500 denali cc duramax 4x4. Bed rail height just over 57 inches. Never occurred to me i might have a clearance problem...I'm new to fivers.Looking at new 36 foot fw's speced at 12500 dry...16000 gvw...2300 to 2500 pin wt. Probably grand design...am i gonna have a clearance issue...thx..bo

You will be fine. I have 6 to 8 in bed rail clearance and my trailer rides level.

I sweated my Bed Rail height. I also ended up with 57". I have 8.5" clearance between the bed rail and 5ver overhang. A lot will probably depend upon the 5ver design. Spend time with a tape measure. Measure from the King Pin to the 5ver overhang. Then determine how high the King Pin will be in the truck bed. This will give you an idea if you will be OK.

No worries. I pull a Grand Design Reflection 337RLS with my '13 F350. My bed rails are at 56.5" and my FW is towing level. I have approximately 7 inches of clearance at the bed rails. I've put on 11K miles so far and I've never had a clearance issue. Please note that my 337 has 16" rims. Some of the smaller Grand Design Reflections have 15" rims and smaller tires which could result in a little less clearance.

Heck that is the height of my 2001 Ram 4X4 I am going to install a correct track kit to get 2' lift on my 05 Copper Canyon so i am right at level.

57" is on the low side. IIRC the new Rams are around 60-61". Should be fine.

bed rail height | Good Sam Community

tegu69
Explorer
Mar 08, 2015
I have actually been considering customizing my 2012 Sierra and taking about 3" off the top of my bed rails, now that its out of warranty.
TucsonJim
Explorer II
Mar 08, 2015
boingram wrote:
Tucson Jim...seriously lookin at the 337 and the solitude...15k difference!

Howz the 337 working for u....thx...bo

bo - Sending you a PM.

Jim
Cummins12V98
Explorer III
Mar 08, 2015
Mopar_Mudder wrote:
So I guess I better go find another job to afford a new fiver. Just going to have to live with it for now, headed to Florida in a couple weeks. So no time to start major mode to it.

Get used to it! It's a never ending cycle bigger, bigger, and yet again BIGGER!
Mopar_Mudder
Explorer
Mar 08, 2015
So I guess I better go find another job to afford a new fiver. Just going to have to live with it for now, headed to Florida in a couple weeks. So no time to start major mode to it.
larry_barnhart
Explorer
Mar 08, 2015
Cummins12V98 wrote:
Mopar_Mudder wrote:
Cummins12V98 wrote:
Mopar_Mudder wrote:
Not all trucks sag. New 3500 Ram with air assist doesn't sag at all, stays full height all the time. Their is an alt trailer height mode but that only drops it 1"

Look at a 15 RAM Dually without rear air they ride higher than your truck. So you start out lower to begin with having the air ride option.

Could be but my 08 sat lower empty, plus it squatted down level when loaded. At some point they have to stop jacking these truck up so much.

It's a conspiracy! New truck means new RV!

Or if the wife wants a new RV then say honey that's fine but we need to get a new Truck to pull it!

It's worked twice for me! 15 RAM will soon be towing 16 MobileSuites we have on order.

Same for us selling the 2500 to get the new 2001 3500 dually. So as you said the wife figured if this truck would be better as I bragged about "of course I did" we could get the alpenlite she always wanted. End of this story.

chevman
routemaster
Explorer
Mar 08, 2015
I had to lift my Everest with Correct Tract because the overhang was close to hitting the bed rail on my new 2015 3500 Chevy LTZ.
Cummins12V98
Explorer III
Mar 08, 2015
Mopar_Mudder wrote:
Cummins12V98 wrote:
Mopar_Mudder wrote:
Not all trucks sag. New 3500 Ram with air assist doesn't sag at all, stays full height all the time. Their is an alt trailer height mode but that only drops it 1"

Look at a 15 RAM Dually without rear air they ride higher than your truck. So you start out lower to begin with having the air ride option.

Could be but my 08 sat lower empty, plus it squatted down level when loaded. At some point they have to stop jacking these truck up so much.

It's a conspiracy! New truck means new RV!

Or if the wife wants a new RV then say honey that's fine but we need to get a new Truck to pull it!

It's worked twice for me! 15 RAM will soon be towing 16 MobileSuites we have on order.
Mopar_Mudder
Explorer
Mar 08, 2015
Cummins12V98 wrote:
Mopar_Mudder wrote:
Not all trucks sag. New 3500 Ram with air assist doesn't sag at all, stays full height all the time. Their is an alt trailer height mode but that only drops it 1"

Look at a 15 RAM Dually without rear air they ride higher than your truck. So you start out lower to begin with having the air ride option.

Could be but my 08 sat lower empty, plus it squatted down level when loaded. At some point they have to stop jacking these truck up so much.
Cummins12V98
Explorer III
Mar 08, 2015
Mopar_Mudder wrote:
Not all trucks sag. New 3500 Ram with air assist doesn't sag at all, stays full height all the time. Their is an alt trailer height mode but that only drops it 1"

Look at a 15 RAM Dually without rear air they ride higher than your truck. So you start out lower to begin with having the air ride option.
Mopar_Mudder
Explorer
Mar 08, 2015
Not all trucks sag. New 3500 Ram with air assist doesn't sag at all, stays full height all the time. Their is an alt trailer height mode but that only drops it 1"

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