Ancient A̶u̶t̶o̶b̶o̶t Decepticon Burial Ground #31
Note: Please do not leave a comment that might give clues where the final cache is located, and please don't take a picture of the cache container (the container itself might a clue, that and the background trees/field/nature might give clues as to it's whereabouts). You can take a picture of the Decepticon though to celebrate the Autobot victory, but do not have the picture show the "number of Autobots he killed" in it.
Not knowing the difference, many people may call a Transformer an Autobot. This site is not the location of a deceased Autobot, it is however the location of a deceased Decepticon (Decepticons are the evil enemy faction of the Autobots). This particular decepticon was responsible for the death of a nearby Autobot around 7km to the North (GC80Y0G).
This Decepticon was taken out by a group of Autobots, who manged to place a sniper shot right through his motor control units, stopping him dead where he stands.
During the battle he was able to send a radio signal out to his ally Deceptions in the hopes that they can retrieve the Energon cube before the Autobots discover it (should he fall).
His message was:
Let 'A' be the digital root of my name.

Hint: You can also determine his name by watching the following video. He is the first Constructicon that is named by Scrapper: https://www.youtube.com/watch?v=xyWuj-zkx3I) (Note: There's no requirement to watch this video... you can find the information via other means if you wish)
My fellow Decepticons know that I like to record the number of Autobots that I killed on my chest. It is currently a 4 digit number that is located above my serial number of '8318DD'. Let the 4 digits of this number be represented by BCDE.
You can find the Energon cube at this location: N 45° 17.(A+B-1)(C+2)1 W 075° 58.(D-3)(E)8
Be sure to private message me if you know of any other undiscovered Autobot burial grounds (old cars/trucks/motorcycles/skidoos or random scraps of metal) in, or near, Ottawa ;) - and don't forget to 'favorite' these if you are enjoying the series.
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Transformers: Robots Geocaching in Disguise
For a list of every cache in this series, look at the bottom of the 1st cache of this series (here).