Start here. Introduce yourself, show your truck, review the rules, and stay current on official announcements, giveaways, and featured builds. Use this area to get oriented, participate in monthly FullSize Feature submissions, and understand how the forum operates before posting elsewhere.

All discussion for 1947–1972 Chevrolet and GMC trucks, including Advance Design and Action Line generations. Restoration, original drivetrains, carburetors, body and rust repair, interior restoration, wiring upgrades, suspension work, engine swaps, and factory options belong here. Keep posts specific to classic pre-Squarebody truck platforms.

Platform-specific discussion for Squarebody Chevrolet and GMC full-size trucks and SUVs (1973–1987). Restoration, carbureted engines, TBI conversions, LS swaps, body repair, frame work, drivetrain, period-correct builds and modern resto-mod direction. Post photos, parts sources, and what you’re learning on your build.

Platform-specific discussion for the OBS / GMT400 full-size Chevrolet and GMC trucks and SUVs (1988–1998 light-duty, 1988–2000 HD Classic). TBI and Vortec 4.3/5.0/5.7, 7.4L 454, 4L60E and 4L80E, restoration, repairs, swaps, upgrades, rust repair and ownership knowledge. Share your project and what’s holding it back.

Platform-specific discussion for 1999–2006 Chevrolet and GMC full-size trucks and related 2007 Classic models on the GMT800 chassis. 4.8L/5.3L/6.0L LS truck engines, 4L60E and 4L80E transmissions, repairs, ownership, modifications and build information. Post your year, engine RPO, mileage and what you’re working on.

Platform-specific discussion for 2007–2013 Chevrolet and GMC full-size trucks and SUVs on the GMT900 chassis. AFM-related ownership concerns, 6L80/6L90 transmissions, 5.3L LC9/LMG, 6.0L L96, common failures, modifications and builds. Post your year, engine, mileage and the symptoms you’re chasing.

Platform-specific discussion for 2014–2018 Chevrolet and GMC full-size trucks and SUVs on the K2XX chassis. EcoTec3 5.3L/6.2L, 6L80/8L90 transmissions, diagnostics, electronics, AFM/DFM concerns, modifications, common problems and ownership experience. Post your year, engine and build direction.

Platform-specific discussion for 2019-and-newer Chevrolet and GMC full-size trucks and SUVs on the T1XX chassis, including EV variants. Modern diagnostics, 10L80/10L90 and Allison transmissions, electronics, accessories, towing, software updates and ownership experience. Share what you’ve learned about the newest generation of full-size GM trucks.

Duramax-powered truck diagnostics, maintenance, towing, drivetrain issues, fuel systems, upgrades and diesel-specific technical discussion. Covers LB7, LLY, LBZ, LMM, LML, L5P and the 6.2L/6.5L Detroit Diesel era. Share codes, towing experience, EGR/DPF/SCR knowledge, transmission tuning and what works in the real world.

Member build threads, restorations, project trucks, progress updates, before/after photos, fabrication work and long-term wrenching projects. Start a thread for your build and update it as you go. Daily drivers, weekend projects, full restorations and work-truck builds all welcome.

Official vendor threads and supporting partners of FullSizeChevy.com. Vendor announcements, product releases, exclusive deals, and community feedback live here. No private sales. Vendors must be approved.

Classified section for trucks, parts, accessories, and wanted listings between members. Private sales only. Follow posting guidelines and include your location so buyers and sellers can evaluate logistics before contacting. All transactions are conducted solely between members. FullSizeChevy.com (FSC), its owners, and staff do not verify listings, guarantee accuracy, handle payments, or provide buyer or seller protection. Purchase, trade, and communicate at your own risk.

Stereo installs, speaker upgrades, head units, wiring, amplifiers, backup cameras, interior lighting, exterior lighting and electrical accessory projects. Share install photos, wiring diagrams, parts lists, head unit pinouts and the things you wish you knew before pulling the dash.

General full-size truck conversation not tied to a specific era or generation.

Off-topic lounge. Shop talk, garage culture, tools, camping, fire pits, hunting, shop builds, and life outside trucks. Keep it respectful. No politics or drama.

FSC Merchandise is the place for all official FullSizeChevy.com gear and product discussions. Find announcements for new drops, limited releases, giveaway items, and community-driven merch inspired by real Chevy truck culture. Members can share photos of their gear, give feedback on designs, suggest new product ideas, and see what’s coming next. This section covers apparel, decals, garage gear, accessories, and special edition releases tied to events, Truck of the Month, and giveaways.

Help improve FSC. Post feature ideas, report bugs, suggest category changes, or provide platform feedback. This helps shape the future of the forum.