1978 GMC C15 Street Coupe Aftermarket Car Parts

Discover our selection of aftermarket car parts across multiple categories. From wheels and tires to suspension, performance upgrades, and exterior and interior enhancements, find everything you need to take your 1978 GMC C15 Street Coupe to the next level.

Wheels & Tires for a 1978 GMC C15 Street Coupe

Suspension Components & Accessories for a 1978 GMC C15 Street Coupe

Performance Parts for a 1978 GMC C15 Street Coupe

Interior & Exterior Parts for a 1978 GMC C15 Street Coupe

Shop Other Accessories

Information about the 1978 GMC C15 Street Coupe

What is the Bolt Pattern (PCD) for a 1978 GMC C15 Street Coupe?

5x127

What is the Center Bore / Hub Bore on a 1978 GMC C15 Street Coupe?

78.1mm

Does the 1978 GMC C15 Street Coupe use Lug Nuts or Lug Bolts?

Lug Nuts

What is the Thread Size on a 1978 GMC C15 Street Coupe?

1/2 UNF

What mods are other 1978 GMC C15 Street Coupe owners running?

Check out our GMC C15 Build Threads to see real-world examples of how other enthusiasts are customizing their cars. From wheels and tires to performance upgrades.

Get The Homie Hookup