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Old 04-06-2016, 12:45 PM   #71
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APEXBUNK, we pulled our Rockwood 3001w Windjammer 5600 miles last year from Texas up to Oregon, then across and through Wyoming and Colorado with a 2013 GMC 1500, 5.3, tow pkg., and had no real issues. The WJ is about 8000# and we are all in at 14,400 GVWR ready-to-camp, so we were at the limits of what that truck was rated for. I had installed a good (read expensive) dual exhaust system and a K&N cold air intake before the trip which I believed helped on the 7,000'+ grades because it could breathe better. Granted we topped the grades doing 50 MPH, in 3rd gear and 3500 RPM, but if I had wanted to hold 60 MPH, all I had to do was buy more gas by pushing the pedal down and running 4500 RPM. We were still passing the 18 wheelers heading up. The tranny temps never got over about 205 which is nothing to worry about.
As we are trading to a large 5th wheel the first of the year we just traded TV and got a GMC 3500HD diesel, dually; I doubt it will notice the WJ is back there the rest of this summer.
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Old 04-06-2016, 12:48 PM   #72
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Originally Posted by SaskCampers View Post
No reason a properly equipped Gasser can't pull your trailer. We went down through the Smokies with our unit. All up almost 18k truck and trailer with 4 adults and yes the truck revved but held it's speed going up. Get the most gear and biggest engine you can get in whatever brand you decide you want. In a Super Duty Ford you can get 4:30 gears, 4:10's in Ram/Dodge and the GM Twins.

Correction my friend, but the newer 1/2 ton Rams have 3.92.


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Old 04-06-2016, 12:57 PM   #73
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Whew, lots of great posts!

Yes, we were in the NC mountains, heading to the Smokys of TN. The Saluda pass did our alternator in (or purely coincidental)- C&D auto repair is highly recommended if you break down in Saluda!

The Truck is outfitted with air intake, spacer, and tuned with HP tuners for 93 octane and 4:10 gears. My husband thinks he may have pulled in the wrong gear. We were in 2nd, and he corrected me that he was not floored. He was 1/2-3/4 throttle, 4000 rpm's and maintaining 40mph speed most of the way. He has the LM7 motor. Also, yes we were in tow mode as well.

We will be traveling mainly in the mountains here, but I do want to take it to Grand Canyon and the Grand Tetons eventually. There are mods we can do to the truck to make it more capable if thats truly the issue but part of me just says I should trade in my sedan and get a GMC Denali so we can take the dogs more easily too. I don't REALLY want to do that. His truck has sentimental value, and I don't want him to part with it.

To the poster who said "Don't worry about the mechanics of it, he needs a new truck"- either you're the same kind of guy my husband is, no need for a reason to upgrade, just need to. Or, you dislike Chevy's, in which case I'm not listening to you anyways. hahaha
As you have seen alot of people have been saying get a newer half ton truck, reason being is they have about 100hp more than your year truck has. Your husband had it about right a small block engine can sing 4000rpm or higher and it isn't going to kill it as long as you watch the heat in your transmission. But unfortunately until you find another 100 horsepower and the corresponding torque value your truck is going to slow down going up any kind of hill.

hope that helps,
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Old 04-06-2016, 12:58 PM   #74
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Ecoboost hauling the 9,000 lb 5th wheel looses speed as well and drops gears to lower. i have yet to see my temp increase above a few degrees though.
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Old 04-06-2016, 01:00 PM   #75
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My 2007 Silverado with 5.3L 315 horse engine does the same. I travel through the Ozarks a lot and it will downshift and get up to 4000 rpm's on long steep hills. I too had a problem with the smell of diesel but my research revealed the new engines emission controls make a difference. I went to a dealer and actually stuck my nose in the exhaust of a Duramax on a 2500 Denali. I could not smell it. Of course that could just be a defective 63 year old nose. Because of that and the quality of the Allison transmission I have order a 2016 GMC with diesel. Hopefully these hills will be less stressful to navigate. I wish I had it now, I'll soon be traveling to Hot Springs down Hwy 7 which has miles of steepness and curves.
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Old 04-06-2016, 01:04 PM   #76
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My 2007 Silverado with 5.3L 315 horse engine does the same. I travel through the Ozarks a lot and it will downshift and get up to 4000 rpm's on long steep hills. I too had a problem with the smell of diesel but my research revealed the new engines emission controls make a difference. I went to a dealer and actually stuck my nose in the exhaust of a Duramax on a 2500 Denali. I could not smell it. Of course that could just be a defective 63 year old nose. Because of that and the quality of the Allison transmission I have order a 2016 GMC with diesel. Hopefully these hills will be less stressful to navigate. I wish I had it now, I'll soon be traveling to Hot Springs down Hwy 7 which has miles of steepness and curves.
have you noticed the fuel mileage decrease in the past few years on the truck in general?
i have a buddy that is a professional hauler that was watching his drop like a rock and stopped at a service rest area and was talking with an 18 wheel hauler and was told to power wash his rad and transmission cooler annually. and be prepared to watch his mileage increase like a balloon...
so he tried just that.

Apparently the fan pulls dust through where the fan is situated but the sides get clogged with dust and reduce cooling and cause mileage to suffer...
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Old 04-06-2016, 01:04 PM   #77
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5.3 Silverado 2014

My truck has tow package and we tow over 5000 lbs. Did the Rockies last summer. Set the cruise control and cruise over the mountains, no problem. I think that newer trucks tow a lot better and that the gearing is more favorable. BTW my mileage was about 11 mpg.
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Old 04-06-2016, 01:13 PM   #78
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Towing 12k to 13k up a 6% grade with my Cummings is like its towing on flat ground. No increase in temps or downshifting. No lose of speed either. Best TV I ever had .
It's a Cummins not a Cummings.
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Old 04-06-2016, 01:45 PM   #79
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I'm assuming your 2005 Silverado has the 5.3 L with the 4-speed auto trans. It probably sounds like the pistons are coming through the hood pulling those hills. We had a 2008 Sierra 1500. Loved the truck, but the trans was terrible. The shift points were too far apart.

We went to a 2013 Silverado 1500 with the 5.3 L and HD tow package. It has not been re-geared. It has a 6-spd auto trans and we tow a fully loaded 7000 lb GVW cargo trailer. With the same trailer and similar loads, the 6-spd trans makes a world of difference. We can now pull a 5% grade gaining speed. We have pulled some other steep grades that are unmarked, so not sure if they exceed 5%. The 5.3 L is not perfect, but the trans certainly helps.
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Old 04-06-2016, 02:07 PM   #80
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Remember he is 5700 lbs dry not loaded. That said, there are definitely gassers that can do it, OP just needs the right gasser. Ie ecobeast or ram hemi. The chevy gasser tends to not have as much power based on my test drives.
Yep apparently you did not really do a good test drive. Mine will walk up a 6% grade at steady 60mph ya it will wine but it's not struggling. Later RJD
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