It's possible you're thinking of the Giraffe Weevil, which is actually a type of longhorn beetle (not a weevil) and is scientifically known as Trachelophorus giraffa.
However, "weevil" isn't used to describe its lifespan. Instead, we talk about how long the giraffe longhorn beetle lives.
Unfortunately, the exact lifespan of the giraffe longhorn beetle in the wild is not well documented. It's likely their lifespan is similar to other longhorn beetles, which can range from a few months to a year or more, depending on the species and environmental factors.