Air bags? Stiffer shocks? Something else?
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Air bags? Stiffer shocks? Something else?

  1. #1
    The Insurance Guy millhouse961's Avatar
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    Default Air bags? Stiffer shocks? Something else?

    Hey guys- I tow my 27' cobra on a triple axle trailer with a 2007 GMC sierra Denali. Boat/trailer/full tank works out to ~7k lb which the truck tows just fine (6.2L vortec 420 lb/ft torque), my only concern is the tongue weight seems like a little too much for the truck even with the triple axle trailer. The truck and trailer sit level when hitched but the rear springs feel real loose. Like for example if i hit a dip on the feewaw, the trailer will bottom out and scapr the tongue jack when it is all the way up. My brother-in-law suggested air bags in the rear, but i don't want to lose the ride quality of the Denali. Any suggestions? (My myspace has pics of the the truck and trailer)
    2003 Cobra 270 Razor

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    Senior Member GT Jets's Avatar
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    I don't know if they will fit the Denali's, I would try and get a set of Air Lifts, they're awsome and really dont effect the ride when deflated (you need to keep like 5 pounds in them when not needed), I had a Z71 extended cab 1/2 ton (1500) and used to pull a Spectra 20 with a Lance cabover camper with a set of 5000# Air lifts set at 80# (get the compressor kit) and never had issues, truck rode the same without loads.

    GT
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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    The Insurance Guy millhouse961's Avatar
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    How much does a kit like that cost?
    2003 Cobra 270 Razor

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    Senior Member GT Jets's Avatar
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    Been a while, but I think I paid under $500 for the whole banana.

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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    Senior Member GT Jets's Avatar
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    Check this out. Good for 1000# leveling, might be enough????

    http://www.airliftcompany.com/online_catalog.html

    GT
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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    The Insurance Guy millhouse961's Avatar
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    they have nothing for sierra denali...argh...
    2003 Cobra 270 Razor

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    Senior Member GT Jets's Avatar
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    Quote Originally Posted by millhouse961 View Post
    they have nothing for sierra denali...argh...
    I thought the one I linked was for a Denali, What year and model?

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    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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    The Insurance Guy millhouse961's Avatar
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    2007 GMC Sierra Denali (1500) 2wd
    2003 Cobra 270 Razor

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    New here Beer:30's Avatar
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    Don't Denali's come standard with AutoRide? That has air already in the back (self-leveling). My wife's Yukon has AutoRide and it works just great. Also, with AR, the tow/haul mode puts more dampening in the rear shocks.

    Don't you hear a compressor come on when you hook the boat up?
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

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    Senior Member CC322's Avatar
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    Heres another option

    http://www.timbren.com/
    The Tequila Made Me Do It




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    28 Powerplay - HP500 RLJ676's Avatar
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    Maybe a weight distributing hitch would help as well? If all the weights on the rear of the frame, behind the rear axle, it levers on it harder I'd think.

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    The Insurance Guy millhouse961's Avatar
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    Quote Originally Posted by Beer:30 View Post
    Don't Denali's come standard with AutoRide? That has air already in the back (self-leveling). My wife's Yukon has AutoRide and it works just great. Also, with AR, the tow/haul mode puts more dampening in the rear shocks.

    Don't you hear a compressor come on when you hook the boat up?
    The Yukon Denali might have that, but the sierra does not. Tow haul mode just changes the shift points and increases alternator output
    2003 Cobra 270 Razor

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    New here Beer:30's Avatar
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    Quote Originally Posted by millhouse961 View Post
    The Yukon Denali might have that, but the sierra does not. Tow haul mode just changes the shift points and increases alternator output
    Ok, that makes sense. Especially after I noticed you had said "Sierra". I was thinking SUV.

    I put an auto-leveling airbag kit in this dually. My last one had the up/down button and gauge. If you go with bags, do the auto-level compressor kit. You won't regret it.

    Rear goes down, compressor comes on and brings it back to whatever you have set as "ride-height". Same when the load is taken off. Bags purge and go back down to ride-height. This works especially well for boating. When the boat comes off of the trailer, the truck levels back out. Boat back on - truck comes back up. Fully automatic and fool proof. I went this route so that anyone can drive the combo and not have to know how much air to run and whatnot.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

  16. #14
    Senior Member Mirage257's Avatar
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    Airbags a definite yes to carry tounge weight. I have an 03Navigator that has coils with air ride. My boat/trailer weighs at 8300 with around 750 lbs tongue weight .Runs level and firm.I only use the WD hitch on long trips for highway speeds even though it rides fine without.

    [

    1990 Mirage 257 ,twin 6.2's
    2003Lincoln Navigator , 5.4 Intech DOHC 32V
    1999 Viper GTS

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