Squarebody Chevy & GMC Trucks (1973–1987)
The Squarebody — 1973 to 1987 Chevy and GMC full-size trucks and SUVs — is the truck that defined a generation and is now one of the hottest classics going. This hub covers buying, decoding, rust, brakes, fuel injection, and keeping a Squarebody on the road. Newer or older? See the Classic (1947–1972) and OBS/GMT400 (1988–1998) hubs.
Latest Squarebody Content
Start here: buying & decoding
- Squarebody Buyer’s Guide: Built When Trucks Were Trucks
- How to Decode Squarebody VINs — C/K ID guide on the forum
- Are Squarebody Trucks Reliable? The Real Answer
- Why Squarebody Values Are Rising Fast
Rust, body & restoration
Brakes, steering & drivability
Engine, fuel injection & swaps
- Squarebody Fuel Injection Conversion Guide
- Best Engine Swap for Squarebody Trucks
- Squarebody C10 Parts Interchange Basics
- Tuning the Rochester Quadrajet on a Squarebody (forum guide)
- Squarebody Overheating Fix: 350 & 454 Cooling (forum guide)
Electrical & lighting
Owner tools for your Squarebody
Free, no sign-up. Useful on a 1973–1987 truck where nobody can agree what it left the factory with.- GM RPO Decoder — type the option codes off your glove box sticker, or photograph the label and let the page read it. Settles what the truck was actually built with before you start buying parts for it.
- GM RPO Code Database — every option code we hold, searchable by code or by plain description, and filterable to your model year.
- MPG Calculator — miles, gallons, engine. You get your number and where it sits against everyone else running the same engine.
Join the Squarebody discussion
Squarebody Gear
Shop all Squarebody gear →
Squarebody Chevy Truck T-Shirt – Low & Slow Neon (1973-1987 C10) | Squarebody Squad Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – ’85 C10 (1973-1987 C10) | Heartbeat of America Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Red Bowtie Shield (1973-1987 C10) | Heritage Badge Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Rounded Cream Shield (1973-1987 C10) | Heritage Badge Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Shield Red Frame (1973-1987 C10) | Heritage Badge Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Bowtie Cream & Red Shield (1973-1987 C10) | Heritage Badge Price range: $28.86 through $35.61
Heritage Badge Squarebody | FSC Car Air Freshener$12.05
Squarebody Chevy Truck T-Shirt – Keep It Full Size (1973-1987 C10) | Keep It Full Size Price range: $28.86 through $35.61
FullSizeChevy Squarebody Lowered Street Truck Wall Flag – Built Not Bought White/Blue Garage Banner | 73-87 Chevy C10 Shop Decor Price range: $25.70 through $51.41
Squarebody Chevy Truck T-Shirt – Send It Through the Mud, Black Edition (1973-1987 C10) | Squarebody Squad Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Monster Truck (1973-1987 C10) | Keep It Full Size Price range: $28.86 through $35.61
Squarebody Chevy Truck T-Shirt – Classic & Clean (1973-1987 C10) | Squarebody Squad Price range: $28.86 through $35.61
Squarebody Truck Car Air Freshener — Retro Vintage Pickup Scented Ornament$12.05
Squarebody Chevy Truck T-Shirt – No Road Needed (1973-1987 C10) | Squarebody Squad Price range: $28.86 through $35.61
Squarebody Chevy Truck Hoodie – Vintage Pullover (1973-1987 C10) | FullSizeChevy Price range: $47.98 through $54.86
Squarebody Chevy Truck Hat – Bowtie Shield, Embroidered (1973-1987 C10) | Heritage Badge$42.61
Talk Squarebody with other owners
Post your truck, your build, or the problem you are chasing. Real Squarebody owners in the FullSizeChevy forum can share what actually worked on theirs.
Open the Squarebody Forum →TECHNICAL INFORMATION NOTICE
Repair, modification, compatibility and specification information on FullSizeChevy.com is provided for general informational purposes only. Always verify procedures, torque values, parts fitment and safety requirements for your exact vehicle using factory service information before performing work. Repairs and modifications are performed at your own risk.