Welcome to Down On The Street, where we admire old vehicles found parked on the streets of the Island That Rust Forgot: Alameda, California. There's no reason that Truck Monday shouldn't fall on a Saturday!
The General doesn't change his truck styling very often- at least, he didn't during the 1960s and 1970s- so this one presents a challenge when it comes to identifying the year. The California smog-check history site says it's a '74, but the black license plates were replaced with blue ones in 1969 and the bulk of body parts appear to be of late 1960s vintage. The way junkyard drivetrains, cabs, and beds get swapped around on million-mile work trucks, there's just no telling, so I'm going to say it's a 1968.
We've seen a few other GMC pickups of this era in the series, including this '66, and this '68, this '71. In fact, this is one of the rare DOTS vehicles that lives right next to another DOTS vehicle; in this case, it's the 1965 Chevy Suburban.