Reply
 
Thread Tools Display Modes
Old 03-18-2013, 07:29 PM   #21
Moderator Emeritus
 
Dave_Monica's Avatar
 
Join Date: Sep 2007
Location: Ontario, Canada
Posts: 4,329
Quote:
Originally Posted by inspireart View Post
Latest literature for my truck shows 4700 lbs. but that is the 2013 model with 9 more horsepower. My 2007 is the new body style by the way.
I've attached the GMC towing guide for 2007 and it confirms the max tow of 4600 lb. If you were to change the rear ratio to 3.73, the max tow limit increase to 6600 lb. See pg 6...

http://www.gm.ca/media/vehicles/comm...rochure_EN.pdf

Dave
__________________

__________________


Nights camped in 2013 - 55, 2014 - 105, 2015 - 63
Dave_Monica is offline   Reply With Quote
Old 03-18-2013, 08:26 PM   #22
Junior Member
 
Join Date: Mar 2013
Posts: 22
C10543 - Crew Cab, 5' 8" Short Box
2087 (4600 lbs) 3.23
2WD 2994 (6600 lbs) 3.73

Wow great! My truck was built at the Windsor plant and my daughter lives in Toronto.

My Canadian friends come through again... thanks.

6600 LBS would take the pressure off quite a bit.

Anybody know the process GM uses to reset the vehicle for the new gears? There is some kind computer box that is hooked up to the truck and the speedometer and shift points are reset.
__________________

__________________
inspireart is offline   Reply With Quote
Old 03-19-2013, 10:05 AM   #23
Senior Member
 
prof_fate's Avatar
 
Join Date: Jan 2011
Location: Beaver, PA
Posts: 911
You'll probably have to got the dealer and pay the piper for the proper eprom flash - assuming they'll do it. Dealership techs are very leery of changing anything from 'stock'.

Having been a ford guy for 25+ years I know it changes from time to time and model to model what and how they do it. ON my 2001 expy there are two computers - one for the engine and one "GEM" as ford calls it htat is very very VIN specific - the interior lights, key fob, transmission and transfer case and a few other things are all run off this computer.

I know my mother in law with an 03 malibu had her fuel pump replaced and had to go to a dealer to get the computer flashed - don't ask my why/how a fuel pump change required a computer reprogram, but without it she got 15-19mpg and after was back to her normal 25-30mpg.

So many things are integrated anymore than it can be difficult or impossible to change something and not have to change 10 other things - or suffer the consequences.

Does the fuel curve change with the new gears? I'd assume so - the revs the engine will be running will be higher, on average, than before - so what other things might change? Temp settings, warm up time, something else?

What other changes were made to get that extra towing capacity? Trans cooler and gearing - or something else? (Bigger brakes? Shocks? Suspension settings? ABS settings? trans shift points (or trans itself?), ujoints, rear axle? I know many of these things change between a 1500 and 2500 and from having worked in several dealerships it's common to have 'running changes' during the year and from year to year and some are very very subtle and poorly documented.

For example, in early 2000 ford (on triton V8s at least) used a head sensor for engine temp and a coolant sensor for engine temp- in late 2001 only a head sensor and the gage was run off the computer. Small detail unless you are trying to diagnose a hot start issue and even the dealer can't tell you what sensor was in your truck as the change was a 'running change' and wasn't necessarlly a 2000/2001 MY changeover so what a specific truck has can really only be determined by looking at the truck and knowing what you're looking for!
__________________
Chris, Wills (16) Evie (13) & Toby our collie (6)
2011 Grey Wolf 28BH
2013 Chevy K1500 Crew w/ Reese StraitLine Dual Cam

Nights camped 2011: 11 2012: 18 2013: 12 2014: 12 2015: 13 2016: 56 2017: 8+
prof_fate is offline   Reply With Quote
Old 03-20-2013, 12:54 AM   #24
Junior Member
 
Join Date: Mar 2013
Posts: 22
Have thought about all those issues. Would rather have a smaller trailer than mess up a practically new truck.Thanks, Bruce
__________________
inspireart is offline   Reply With Quote
Old 03-20-2013, 07:49 AM   #25
Camper Less Camping
 
Cajun Po-Boy's Avatar
 
Join Date: Apr 2012
Location: NW
Posts: 3,642
Quote:
Originally Posted by inspireart View Post
Have thought about all those issues. Would rather have a smaller trailer than mess up a practically new truck.Thanks, Bruce
Great plan...Good Luck!
__________________
2013 Sabre 32RCTS-6 (sold)
Family of 4 whose always on the GEAUX!
Cajun Po-Boy is offline   Reply With Quote
Old 03-27-2013, 02:26 PM   #26
Senior Member
 
thebrakeman's Avatar
 
Join Date: Mar 2011
Location: Canton, Michigan
Posts: 1,105
My sister and BIL bought a Sierra with that 4.8L V8 and 3.23 gearing before they decided to buy a camper. For a pickup, it's great on mileage. When I looked in their manual to help them search, I found that same 4600 (4700?) rating.

fyi - The link from Dave-Monica also shows you have 10,000 lbs GCVWR (combined rating), which would increase to 12,000 lbs with the 3.73 gearing.

I recommend you get the empty truck weighed, and subtract from 10,000 lbs. This will tell you exactly how much YOUR truck can haul (in the truck, plus behind the truck). Subtract the weight of you and the DW. What's left is what's available for the loaded trailer and anything in the truck bed.

Most likely, you will be somewhere around 4500 lbs. Subtract the 3600 lbs empty camper, and you only have 900 lbs available for stuff in the camper and in the truck bed. This is doable, as long as you stay in the mid-west area (that means, relatively flat).

Installing a trans cooler will help protect the trans, but as has been stated, that 3.23 gearing is your limiting factor. Be ready to pull out of OD if there is any sign that it can't find the right gear. If you are able to swap to the 3.73 gearing, you will be in much better shape. It would probably be able to run this trailer in 4th (OD) rather than 3rd, which may be better in the long run gas-wise.
__________________
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller
thebrakeman is offline   Reply With Quote
Old 03-27-2013, 03:34 PM   #27
Junior Member
 
Join Date: Mar 2013
Posts: 22
Been researching the 3.73 change

My long trusted mechanic suggested that I just go with the transmission oil cooler. GM has been zero help on finding out about the EPRON flash.
__________________
inspireart is offline   Reply With Quote
Old 03-28-2013, 09:20 AM   #28
Senior Member
 
thebrakeman's Avatar
 
Join Date: Mar 2011
Location: Canton, Michigan
Posts: 1,105
I think it's fine to try it with just the cooler upgrade. I would recommend you get a ScanGuage so you can monitor trans temp and many other items. I love mine. It plugs directly into the OBD connector under the dash.

Just accept the possibility that you may need to do other work after you go on a trip or 2. You kept this truck in good shape. You don't want to screw your transmission by forcing it to work too hard with that diff.
Keep us informed.
__________________
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller
thebrakeman is offline   Reply With Quote
Old 06-11-2013, 06:30 PM   #29
Phat Phrog Stunt Team
 
Join Date: Apr 2011
Location: South West PA
Posts: 2,947
Dodge HD 2013

FYI

First Drive: 2013 Ram HD 2500/3500 - PickupTrucks.com News
__________________
grayfox is offline   Reply With Quote
Old 06-11-2013, 09:42 PM   #30
dzg
Junior Member
 
Join Date: Jun 2013
Posts: 7
Horsepower doesnt matter as much as torque. I tow my 7000 lb salem with a 77F250 that makes a whopping 169hp. But it makes decent torque (325ftlbs) at a nice low 1200 rpm. Low end torque is where its at.

Not to metion highway 3.07 gears.

Usually brakes,wheelbase and suspension play into more then engine power
__________________

__________________
dzg is offline   Reply With Quote
Reply

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



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 11:40 PM.