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Author Topic: Trailer Hitch without "towing package"  (Read 69224 times, 143 Replies)
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stiffi
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« on: October 03, 2007, 03:48:21 PM »

Can somebody tell me if there is a power receptable in the rear of the Acadia if you DON'T get the towing package?

thanks
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vogelm1
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« Reply #1 on: October 03, 2007, 04:45:00 PM »

Yes, should be a receptacle under the bumper on driver's side that provides for a light hook up even though you don't have the "tow package" from factory.  A caution if you have an '07 model...there's still a receptacle under the driver's side rear bumper, but no fuses, relays, nor contacts provided in the fuse panel!!  This is apparently covered under warranty and you can get the "proper" fuse panel put in at the dealership; although a few forum members did have to pay for this service real early on - before it was noted as a problem maybe?  Why it was built this way at the factory, I don't know.  If you search the threads there's a topic on this and there's many folks who've experienced the same thing.  Hopefully this fuse box issue was corrected on '08 models without the factory tow package.  Good luck!!
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stiffi
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« Reply #2 on: October 03, 2007, 04:52:09 PM »

Is there a trailer hitch receiver also? Or is this just omitted completely without the towing package?
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vogelm1
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« Reply #3 on: October 03, 2007, 05:14:27 PM »

Is there a trailer hitch receiver also? Or is this just omitted completely without the towing package?

Correct, no receiver hitch.  There is a trim panel that is removable on the non-hitch equipped models and if you decide to add a hitch later, a new trim (facia) panel is available (has a slight bulge in it) to accomodate the receiver.
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caddycruiser
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« Reply #4 on: October 04, 2007, 08:43:58 AM »

Same response I just gave over on Saturn Fans:

No, the harness is there, but not functioning--some have said requires extra part(s) and programming, or just won't work, regardless.

That all comes as part of the package, a big reason being, without the Tow Package, you can't tow much anyway with just a hitch add-on, because you're lacking the extra cooling, larger alternator, unique transmission shifting mode, etc.

Fine if you just want a hitch to hold a bike rack or something, though. And are just wanting the power for a light, or something.

Here's a decent thread I found, searching for "towing":
http://www.saturnfans.com/forums/showthread.php?t=101864&highlight=towing

And some that are VERY detailed about this:
http://www.saturnfans.com/forums/showthread.php?t=101658&highlight=towing
http://www.saturnfans.com/forums/showthread.php?t=96349&highlight=towing
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JLF
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« Reply #5 on: October 04, 2007, 08:30:43 PM »

I didn't get the tow package but added a hitch myself.  The harness that was there, would give you trailer lights only, no turn signals.  I ordered the harness that comes with the tow package and now have all the wires there.  I have a fuse panel on order since i couldn't talk my dealer into doing it under warranty. 
There are a lot of vehicles out there that never had a tow package and do quite well and i would say the Acadia would also.  You may not want to tow something a looooooooong way or everyday but an occasional tow is not going to do any damage. My .02 worth anyway.
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rcrules
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« Reply #6 on: October 04, 2007, 08:41:35 PM »

The harness that was there, would give you trailer lights only, no turn signals.

Where was the harness at?  I couldn't find it under mine?  Does it look like the attached picture?
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« Reply #7 on: October 05, 2007, 05:32:24 PM »

Yes, that's the harness.  Fairly easy to replace.  I removed the screws along the right rear fenderwell and was able to reach up and disconnect the connector.  Then used a flat blade screwdriver to pry the fasteners loose.  Removed it and put the new harness in.
Sorry i haven't posted sooner but for some reason this site is very picky as to letting me post.  Hopefully it'll work this time.
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« Reply #8 on: October 16, 2007, 10:32:51 PM »

A dealer told me last weeked the Acadia's without the towing package still comes with the cooling unit for the transmission.  Does anyone know if that is true?  Thanks
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vogelm1
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« Reply #9 on: October 17, 2007, 09:38:38 AM »

A dealer told me last weeked the Acadia's without the towing package still comes with the cooling unit for the transmission.  Does anyone know if that is true?  Thanks

Mine didn't come with a tow package, and I have lines running from the trans to the radiator - so would assume this for trans cooling.  It's the same set up we have on our Yukon and it's cooled everything just fine.  Was thinking I needed to install an after market cooler when I eventually add a hitch, but don't think I will need to now.
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jcflorida
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« Reply #10 on: October 17, 2007, 10:18:54 PM »

You are describing the standard transmission cooling. The towing package adds an extra cooler.
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Gary
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« Reply #11 on: October 23, 2007, 07:53:14 AM »

I have an Acadia without the tow package.  I installed an aftermarket transmission cooler and I tow a 3500 lb. boat without any problem.  The engine temperature gauge always remains at the same temperature wether towing or not.  The car also came with a small engine oil cooler that is mounted in front of the rad.  My dealer installed the new fuse panel to make the harness operable at no charge as this is covered by GM under warranty.  I am very happy with the towing ability of this vehicle.
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GAR
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« Reply #12 on: October 23, 2007, 07:59:45 AM »

My dealer installed the new fuse panel to make the harness operable at no charge as this is covered by GM under warranty. 

Do you have a 2007 or a 2008.  I have a 2008 that was built in July and I am trying to figure out if I will need to get this fuse panel thing done.  I don't plan on installing the hitch for awhile, but don't want to wait too long if it needs fixed.  Does anyone else know if this is a problem with both years?
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« Reply #13 on: October 23, 2007, 05:32:28 PM »

I have a 2007. I don't know if it applies to the 2008.  Someone posted that the wiring harness behind the back bumper is no longer there.  There apparantly is a wiring plug somewhere else on the 2008.  Maybe somebody with a 2008 without a tow package can comment.
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CableDude
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« Reply #14 on: January 08, 2008, 11:31:31 AM »

I have a 2008 Acadia with a biuld date of Sept 2007. It did not have the tow package option. I was able to order the factory, hitch, 7 pin recepticle, 8 bolts, harness, and curved bumper peice all from GMcpartsdirect.com. The fuse pannel had to be updated to a V92 version and my dealer did that under warrenty. Just refer them to the TSB below if they have any questions.

Also picked a very nice 7 wire to 4 wire connector at Tractor Supply. It is a yellow coiled 3 foot long with round plug one end and 7 plug the other. This will keep your wires from touching ground as it will move with your turns. Each end will light up at night. Cost is 29.95. You can see it here - http://www.trailerwiring.com/ - and put in part number 47015

CableDude


Subject:   Supplemental Information on Recreational Vehicle and Trailer Towing and Trailer Wiring Accommodation for Non-V92 Equipped Vehicles #07-00-89-021A - (06/27/2007)
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GAR
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« Reply #15 on: January 08, 2008, 12:08:11 PM »

I have a 2008 Acadia with a biuld date of Sept 2007. It did not have the tow package option. I was able to order the factory, hitch, 7 pin recepticle, 8 bolts, harness, and curved bumper peice all from GMcpartsdirect.com. The fuse pannel had to be updated to a V92 version and my dealer did that under warrenty. Just refer them to the TSB below if they have any questions.

Also picked a very nice 7 wire to 4 wire connector at Tractor Supply. It is a yellow coiled 3 foot long with round plug one end and 7 plug the other. This will keep your wires from touching ground as it will move with your turns. Each end will light up at night. Cost is 29.95. You can see it here - http://www.trailerwiring.com/ - and put in part number 47015

CableDude


Subject:   Supplemental Information on Recreational Vehicle and Trailer Towing and Trailer Wiring Accommodation for Non-V92 Equipped Vehicles #07-00-89-021A - (06/27/2007)


I eventually will do something like this as well.  I just want to verify.  This is still considered an aftermarket trailering package and per the manual, the towing capacity will be 2000 lb, not the 4500 lb.  Correct?
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« Reply #16 on: January 08, 2008, 12:47:49 PM »

This is still considered an aftermarket trailering package and per the manual, the towing capacity will be 2000 lb, not the 4500 lb.  Correct?

That is correct.
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GAR
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« Reply #17 on: January 08, 2008, 03:22:38 PM »

Subject:   Supplemental Information on Recreational Vehicle and Trailer Towing and Trailer Wiring Accommodation for Non-V92 Equipped Vehicles #07-00-89-021A - (06/27/2007)

Does anyone have a copy of this notice that could be posted here?  I'm curious if this is for only some serial numbers, or for all vehicles that did not have V92.
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« Reply #18 on: January 09, 2008, 01:41:40 PM »

Here is the TSB from another post. I don't know if it is by vin number but suspect anyone that does not have a V92 fuse pannel can get one under warrenty. Print out this TSB and take it to the dealer. They are not going to fight you on this. My 2008 year isn't listed on this and they didn't blink when I asked for a change out.

CableDude


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 Subject:   Supplemental Information on Recreational Vehicle and Trailer Towing and Trailer Wiring Accommodation for Non-V92 Equipped Vehicles #07-00-89-021A - (06/27/2007)

Models:   2008 Buick Enclave

   2007 GMC Acadia

   2007 Saturn OUTLOOK

This bulletin is being revised to add models and revise dinghy towing procedures. Please discard Corporate Bulletin Number 07-00-89-021 (Section 00 - General Information).

The purpose of this bulletin is to inform dealers of special procedures necessary when towing a trailer or when towing the vehicle behind a recreational vehicle.
Towing a Trailer

Trailer Weight Information
The following chart shows how much the trailer can weigh, based on the vehicle powertrain combination. Retailers should refer customers to the appropriate Owner Manual for important trailering tips, vehicle maintenance, and safety rules before towing a trailer.
Vehicle   Maximum Trailer Weight
3.6L V6 (LY7) Engine with Front-Wheel Drive and 6-Speed Automatic Transaxle (MY9) with Trailer Provisions (V92)   4,500 lb. (2,041 kg)
3.6L V6 (LY7) Engine with Front-Wheel Drive and 6-Speed Automatic Transaxle (MY9), NO Trailer Provisions   2,000 lb. (907 kg)
3.6L V6 (LY7) Engine with All-Wheel Drive and 6-Speed Automatic Transaxle (MH6) with Trailer Provisions (V92)   4,500 lbs. (2,041 kg)
3.6L V6 (LY7) Engine with All-Wheel Drive and 6-Speed Automatic Transaxle (MH6), NO Trailer Provisions   2,000 lb. (907 kg)

Towing a Trailer with a Vehicle NOT Equipped with Trailer Provisions
2008 Buick Enclave, 2007 GMC Acadia and 2007 Saturn OUTLOOK vehicles that are not equipped with trailer provisions (RPO V92) must be modified with a new underhood bussed electrical center (UBEC) to provide full functionality for 4 circuits: ground, tail lamps, RH and LH stop/turn lamps. Refer to the Parts Information section in this bulletin for the correct part numbers. To find the original part number, remove the UBEC and look at the side of the UBEC.
This UBEC replacement should only be performed for customers who perform trailer towing. UBEC replacement for trailer towing is only covered under warranty for 2007 model year GMC Acadia and Saturn OUTLOOK vehicles, and 2008 Buick Enclave vehicles.

Towing a Trailer with a Vehicle with Trailer Provisions (RPO V92)
The following procedure may need to be performed to the backup lamp circuit. Perform this procedure only if the customer will be using the vehicle to tow.
1.   Disconnect the X7 connector from the Body Control Module (BCM).
2.   Remove the terminal for pin 3 from the BCM X7 connector. The wire to this terminal is dark blue and is the 38 circuit.
3.   Re-connect the X7 connector to the BCM.
4.   Cut the terminal off the end of this wire and strip the end of the wire.
5.   Splice this wire into the 24 circuit wire that goes into BCM connector X6, pin 2. The 24 circuit is light green.
Recreational Vehicle Towing (Dinghy Towing)

Important: To avoid battery rundown while towing, remove the 50 amp BATT1 fuse in the UBEC. Refer to the dinghy towing procedure in this bulletin.
Recreational Vehicle Towing Information
Important: Vehicles with a 6-speed automatic transmission that are "dinghy towed" must be started at the beginning of each day and at each fuel stop for a minimum of five minutes.

Recreational vehicle towing means towing the vehicle behind another vehicle -- such as behind a motorhome. The two most common types of recreational vehicle towing are known as "dinghy towing" (towing the vehicle with all four wheels on the ground) and "dolly towing" (towing the vehicle with two wheels on the ground and two wheels up on a device known as a "dolly"). With the proper preparation and equipment, many vehicles can be towed in these ways. Refer to the appropriate model/model year Owner Manual for towing preparation guidelines and dolly and dinghy towing procedures. The Towing Chart below summarizes powertrain combination compatibility with dolly and dinghy towing methods.
2008 Buick Enclave, 2007 GMC Acadia, 2007 Saturn OUTLOOK Recreational Vehicle Towing Chart

Powertrain Combination and Towing Method   Rear Wheels on a Tow Dolly   Front Wheels on a Tow Dolly   All Four Wheels on the Ground (Dinghy)
3.6L V6 (LY7) Engine with Front-Wheel Drive and 6T75 Six-Speed Automatic Transaxle (MY9)   No   Yes   Yes*
3.6L V6 (LY7) Engine with All-Wheel Drive and 6T75 Six-Speed Automatic Transaxle (MH6)   No   No   Yes*
*Notice: If the vehicle is equipped with a 6T75 six-speed automatic transmission, it can be dinghy towed from the front for unlimited miles at 65 mph (105 km/h). To avoid vehicle damage, never exceed 65 mph (105 km/h) while towing Buick Enclave, GMC Acadia and Saturn OUTLOOK vehicles. The repairs would not be covered by the warranty.

Dinghy Towing Procedure
Notice: If you tow your vehicle without performing each of the steps listed under "Dinghy Towing," you could damage the automatic transmission. Be sure to follow all steps of the dinghy towing procedure prior to and after towing your vehicle.
Notice: Don't tow a vehicle with the front drive wheels on the ground if one of the front tires is a compact spare tire. Towing with two different tire sizes on the front of the vehicle can cause severe damage to the transmission.
Important: Buick Enclave, GMC Acadia and Saturn OUTLOOK vehicles may only be dinghy towed from the front, with all four wheels on the ground.
1.   Position the vehicle to tow and then secure it.
2.   Shift transmission to PARK (P) and turn the ignition to OFF.
3.   Set the parking brake.
4.   Turn the ignition to ACCESSORY.
5.   Shift your transmission to NEUTRAL (N).
6.   To prevent your battery from draining while the vehicle is being towed, remove the 50 amp BATT1 fuse in the UBEC, and store in a safe location.
7.   Release the parking brake.
Once you have reached your destination, do the following steps:
1.   Set the parking brake.
2.   Reinstall the BATT1 fuse.
3.   Shift the transmission to PARK (P), turn the ignition key to OFF and remove the key from the ignition.
4.   Release the parking brake.
Parts Information

Part Number   Description
25784721   Underhood Bussed Electrical Center
(replaces 25784722)
25784723   Underhood Bussed Electrical Center
(replaces 25784726)
25784725   Underhood Bussed Electrical Center (replaces 25784724)
Warranty Information

For vehicles repaired under warranty, use:
Labor Operation   Description   Labor Time
N1730   Block Assembly, Wiring Harness Junction - Engine - Replace   0.3 hr

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
   
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION

Copyright General Motors Corporation. All Rights Reserved.
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JLF
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« Reply #19 on: January 09, 2008, 06:35:57 PM »

I tried to get the fuse panel under warranty, but no go. Angry  I went ahead and bought it at a very reasonable price.  I even contacted GMC customer service and referenced the TSB all to no avail.  All was asking for was to be reimbursed for the fuse panel, but it didn't happen.  Oh well, at least everything is in and works good.  I've also got the old fuse panel with a bunch of extra relays and fuses. Grin

As far as towing capacity i see no reason the Acadia wouldn't be able to tow the 4500lbs.  I would think the only thing the factory installed tow package does is change shift points and this can be accomplished manually with the shifter up/down button.  The trans is the same, brakes the same etc. etc.  As far as cooling, unless you're in a high heat area towing up hills, there shouldn't be any problems.  My .02 worth anyway.
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