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Old 09-29-2015, 02:06 AM
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Module update

I'm installing a hitch on my 2012 Jeep Grand Cherokee. I was told that I need to get an update for the transmission. Does anyone know if this is true.

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  #2  
Old 09-29-2015, 08:40 AM
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Re: Module update

While the vehicle has the wiring harness back to behind the rear bumper from the factory, it's not activated in the computer. In order for you to have power available for trailer lights (and brakes if applicable with an add-on brake controller), you need to have the dealer service department "turn on" the wiring...which unfortunately comes with a fee.

Please note that adding a hitch to your vehicle does not provide the same towing limits as the factory tow option because that option includes a lot of other accommodations to improve towing performance. The manual states Jeep will only authorize 3500 lbs with an aftermarket hitch install, including the OEM unit. I only mention this in case you intend to do some serious towing and if so, you'll need a different vehicle.
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Old 09-29-2015, 08:45 AM
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Re: Module update

Quote:
Originally Posted by Jim_in_PA View Post
While the vehicle has the wiring harness back to behind the rear bumper from the factory, it's not activated in the computer. In order for you to have power available for trailer lights (and brakes if applicable with an add-on brake controller), you need to have the dealer service department "turn on" the wiring...which unfortunately comes with a fee.

Please note that adding a hitch to your vehicle does not provide the same towing limits as the factory tow option because that option includes a lot of other accommodations to improve towing performance. The manual states Jeep will only authorize 3500 lbs with an aftermarket hitch install, including the OEM unit. I only mention this in case you intend to do some serious towing and if so, you'll need a different vehicle.
Do you happen to know offhand the towing capacity of the Grand Cherokee 2WD with the HEMI, and the factory towing package? I've heard it's more than the 4 WD, but I can't confirm this.
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Old 09-29-2015, 10:49 AM
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Re: Module update

Okay thanks so much. No I'm not doing any major towing, just a little hunting trailer. Thanks again for the help.
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Old 09-29-2015, 04:09 PM
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Re: Module update

Quote:
Originally Posted by billt View Post
Do you happen to know offhand the towing capacity of the Grand Cherokee 2WD with the HEMI, and the factory towing package? I've heard it's more than the 4 WD, but I can't confirm this.
For the Hemi 2WD and Ecodiesel 2WD, it's 200 more pounds. 7400 vs 7200 for the 4x4. I believe that also is accounted for in the cargo capacity when not towing, too.
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Old 09-29-2015, 07:24 PM
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Re: Module update

Thanks!
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