Use a de-greaser like WD-40,give it a good spray,leave it for 45 minutes then go at it,and the glue should have softened and be more easier to scrape off.I use this method everytime i take graphics off frames/parts i'm prepping for paint.Nice truck by the way spoiled goods,my brother has a Toyota Hi-lux crew cab pick up,lovely machines.His is a lot smaller than these American models that you own. All the best to you and yours for the new year m8. Gary.
Goo Gone and a thin razor blade works too - then use an alcohol and water solution in a spray bottle to get it squeaky clean if you plan on applying something new. It's what we do for full car wraps and decals.
lol sorry i have no experience removing those badges but i have used the goo gone stuff twosix is talking about and it works great on sticky stuff .
YOTA!!
All the best to you and yours for the new year m8.
Gary.