GMC G15 Van Parts & Accessories

GMC G15 Van Parts & Accessories

The GMC G15 is the half-ton full-size van designation used through the 1970s on the G-body platform, sharing every mechanical component with the Chevrolet G10 of the same year and representing the lightest-duty variant in the GMC full-size van lineup. These vans powered the conversion van boom of the 1970s and served contractors and fleets as cargo vans, and they used the same 250 inline-six and small-block V8 engines available across the GMC truck lineup of that era. The G-body platform is straightforward to work on, with wide parts availability from both the restoration community and standard automotive suppliers that stock components shared across the broader GM chassis. Today the G15 is popular for camper van conversions, full custom van restorations, and as a donor platform for modified street vans that benefit from the classic proportions and the active community of builders who have documented every modification path in detail.

Popular Upgrades

Front disc brake conversion kits from Classic Performance Products or CPP are the most impactful safety upgrade for a G15 van returned to regular use, providing the stopping capability that the factory four-wheel drum setup cannot match. Edelbrock Performer intake manifolds and Holley or Edelbrock carburetors on the 350 small-block improve power delivery throughout the RPM range and are the foundation of any G15 performance build that wants to stay naturally aspirated. Electronic ignition kits from Pertronix replace the factory points-and-condenser system and improve reliability and starting behavior, which is particularly important for a van used as a daily driver or on extended road trips where roadside ignition issues are inconvenient.

Performance and Handling

The G15 uses a front coil spring independent suspension and a rear solid axle on leaf springs, which provides a solid maintenance-friendly baseline that responds well to fresh shock absorbers from Monroe or Gabriel and replacement control arm bushings from Moog. Power steering pump rebuilds or replacement units address the steering effort that increases on vans with worn hydraulic components, and keeping the power steering system in good condition makes the G15 genuinely pleasant to drive in parking lots despite its size. Rear leaf spring replacement packs from National Spring restore load capacity and ride height on a van that has seen decades of cargo service.

What is the difference between the GMC G15 and the Chevy G10 van for parts?

The GMC G15 and Chevrolet G10 of the same model year are the same vehicle sold under different brand names, sharing every mechanical component including the frame, suspension, engines, transmissions, and brake hardware. The differences are limited to front fascia styling, badging, grille design, and some interior trim panels that carry the respective brand identity. Any parts catalog entry for the Chevrolet G10 applies directly to the GMC G15, and both designations should be used when searching for harder-to-find mechanical or restoration components.

What makes the G15 a good camper van base?

The G15 provides one of the most practical camper van starting points because the high roof and long wheelbase deliver more interior volume than most modern purpose-built camper van platforms at a fraction of the acquisition cost. The 350 small-block TH350 combination is simple to maintain anywhere in the country without specialty tooling or dealer diagnostic equipment, making it genuinely road-trip reliable when properly maintained. The van's interior structure is clean and easily insulated, the floor is flat for fitout work, and the G-body community has documented dozens of completed builds with detailed guidance on every aspect of the conversion process.

Why These Parts Fit Right

Every listing in the GMC G15 collection is verified against the G-body half-ton van platform with engine fitment noted for inline-six and V8 configurations. Cross-reference to the Chevrolet G10 designation is flagged to help source harder-to-find items from suppliers that catalog the platform under either name. Most in-stock parts ship same day or next business day.

Explore related resources in the exhaust systems collection, the suspension parts catalog, and the air intake systems section.