yes ground is ground. Period. The reason they tell you not to is because dead batteries can vent hydrogen, an explosive gas. By hooking up to the dead battery, IF YOU'VE ALREADY CONNECTED TO THE JUMPING VEHICLE, it can spark igniting the hydrogen and exploding the battery.

 

Ground IS NOT ground. As has been mentioned a few times already, read the manual. There's a sensor involved nowadays and it's nothing to do with fumes. I swear, the cleanest thing in most vehicles is the owners manual.

 

LOL

I am not going to fight with you. The entire chassis of a vehicle is technically the ground terminal. The only reason they tell you not to attach to the battery is the proximity of "sparking" that can occur. But believe what you want.

 

It always helps me to remember the cable connecting sequence by memorizing the phrase "dead red to red hot" as the first connection. Then, in my mind the next connection of "hot black to dead black" follows without a logical struggle. And yes, I subscribe to "dead black" as being a ground on the chassis far removed from the negative post of the dead battery.

 

As mentioned by Garnet on the newer Trucks including your 2.7 The battery and charging system is controlled by the BCM using sensor,s mounted to the battery, connecting a load directly to the battery can confuse the BCM and charging system. So yes if you are jumping from an older truck a ground is a ground but the 2.7 is a whole other basket of worms. It will not harm any thing if done properly, read Da Book

 

There is nothing in the owners manual about the 2.7 being some special ground.if you hook the cable terminal to terminal it will jump start the car its almost crazy reading some of the things being written.
the pic is right out of my manual

 

The 2.7 with the auto stop start feature and the factory AGM battery is a special case as will all the newer trucks equipped with auto stop start and AGM battery be.

 

In the rare situation the donor vehicle has a lithium battery you can ruin it by jumping as it can exceed the design amperage of the battery.

 

There's nothing different/special about the AGM. It can be jumped just like any other lead-acid battery.

As already mentioned, lithium chemistry batteries (LiIon, LiPoly, LiFePO4, etc.) are special.

 

Note the warning! LOL This is what I meant. It has nothing to do with sensors, etc.