1977 GMC C20 HIGH SIERRA | SAME FAMILY SINCE NEW | CRATE 350 V8 | TRUE ALBERTA TIME CAPSULE

The stories are what make a truck special. The documentation is what proves it.

This 1977 GMC C20 High Sierra is the kind of Squarebody that collectors spend years trying to find—a truck that has remained in the same Alberta family since new and comes with an incredible history file spanning decades. Accompanied by extensive documentation, historical appraisals dating back to the mid-2000s, and a well-preserved ownership history, this is far more than just another classic truck.

In many ways, it's a true time capsule.

The truck has been repainted once during its lifetime, while the interior remains completely original and presents beautifully today. From the upholstery and trim to the overall feel of the cab, it offers an authentic glimpse into the late 1970s and stands as a testament to the care this High Sierra has received throughout its life.

Under the hood sits a recently installed Crate 350 V8 that is so fresh it still contains its break-in oil. To complement the new powerplant, the transmission has also been professionally rebuilt, providing modern reliability while preserving the character that makes this truck so special.

HIGHLIGHTS
Same family ownership since 1977
Alberta registered
GMC High Sierra trim package
Recently installed Crate 350 V8
Engine still contains break-in oil
Recent transmission rebuild
Original interior showing exceptionally well
Repainted once during its lifetime
Extensive documentation and ownership history
Historical appraisals dating back to the mid-2000s
Highly desirable Squarebody GMC platform
True collector-grade provenance

***WHY THIS TRUCK STANDS OUT***

Anyone can restore a truck.

You can't recreate decades of documented GM Canada history, the smell of an original GM interior, or that unmistakable Squarebody door slam that takes you straight back to 1977.

That stuff only comes with time.

This High Sierra has survived because it was cherished, preserved, and passed down within the same family since day one. The result is a truck that still feels honest, authentic, and remarkably original—exactly what serious collectors look for.

Whether you're a Squarebody enthusiast, GMC collector, or simply someone who appreciates vehicles with a story worth telling, this C20 represents a rare opportunity to own a genuine piece of Alberta automotive history.

A true time capsule from the golden era of GMC trucks—preserved, documented, and powered by a fresh Crate 350 ready for its next chapter.