45 Dynacorn Body Parts for the 1973–87 Chevy / GMC Truck (C10): Complete Fitment Guide

Posted on: June 1, 2026 in Guides

The 1973–87 Chevrolet C10 and GMC truck — better known as the “square body” generation — is one of the most popular restoration projects in the country right now, and for good reason. It is tough, simple, and endlessly customizable. The problem is rust. These trucks were built before modern corrosion protection, and fifty-plus years of road salt, wet grass, and neglect have taken their toll. Dynacorn chevy truck body parts are the industry standard for restoring these trucks to factory-correct condition, and Classic Body Parts carries 45 of them at the best prices available.

This guide covers every Dynacorn part that fits the 1973–87 Chevy C10 and GMC truck — what it fits, what it costs, and how hard it is to install — so you can build your parts list and get your restoration moving.

Why the 1973–87 Chevy C10 Is One of America’s Most Restored Trucks

The square body generation ran from 1973 to 1987 and hit a sweet spot that no other truck generation quite matches. The styling is clean and purposeful — wide fenders, a flat hood, a boxy cab that looks equally at home as a show truck or a working ranch rig. The drivetrain is simple enough for a home mechanic to rebuild completely, and the aftermarket support is enormous.

Resale values for finished builds have climbed sharply. A clean frame-off restoration in a desirable color can bring $40,000 to $70,000 or more. Even a solid driver-quality build is worth real money. That makes the investment in quality Dynacorn sheet metal easy to justify — cutting corners on body panels always shows up when it matters most.

The 1979 model year is one of the most sought-after in the generation because it carries the pre-facelift front end styling that many builders prefer over the sharper look that came in 1981.

What Dynacorn Makes for the 1973–87 Chevy / GMC Truck

Dynacorn has been producing reproduction sheet metal for classic vehicles since 1984. Their C10 catalog covers the most rust-prone and most commonly replaced components on the square body — bed floors, bedsides, tailgates, wheelhouses, and supporting hardware. Every panel is stamped from heavy-gauge steel to OEM specifications and designed for direct replacement without excessive modification.

Here is the complete list of Dynacorn chevy truck body parts available for the 1973–87 C10 and GMC truck, organized by category.

Bed Floor Panels

The bed floor is almost always the first thing to fail on a square body truck. Water pools in the bed, the drain holes plug up, and the steel rusts from the bottom side where you can’t see it until it’s too late. These are the highest-priority Dynacorn chevy truck body parts for most restorers.

1973–87 Chevrolet Truck Bed Floor Pan — Short Bed SKU: 1188B | $914.95 Full replacement floor pan for short-bed configurations. Includes the corrugated bed floor profile and flange areas. This is a one-piece solution for short-bed trucks with significant floor deterioration. One of the top-selling Dynacorn parts in the entire C10 line.

1973–87 Chevrolet Truck Bed Floor Panel — Long Bed SKU: 1188A | $1,198.95 Full replacement floor panel for long-bed configurations. Same heavy-gauge steel construction as the short-bed version. If you’re building a long-bed resto-mod, start here.

1973–87 Chevrolet Truck Bed Floor Cross Sill — Short Bed SKU: 1189 | $92.95 The cross sill provides structural support under the bed floor panel. Replace the floor pan and the cross sill at the same time — they work as a system.

1973–87 Chevrolet Truck Tail Panel Rear Cross Sill SKU: 1189F | $139.95 Rear structural member that ties the bed floor to the tailgate opening. Required for a proper bed floor restoration.

Bedsides

Bedsides take constant road debris and UV exposure, and they rust along the lower edge first where the paint breaks down over the wheel opening. Dynacorn produces driver and passenger bedsides for the most common configuration.

1977–87 Chevrolet Truck Bedside — RH — Short Bed SKU: 1160ZG | $450.95 Full fleetside bedside for the right-hand (passenger) side, short-bed configuration. Direct-fit replacement with proper stampings for stake pocket holes and side trim attachment points. In stock.

1977–87 Chevrolet Truck Bedside — LH — Short Bed SKU: 1160ZH | $450.95 Left-hand (driver) side counterpart. Order both sides together to ensure matching panel gaps and a consistent finish. In stock.

Bed Exterior and Rear Panels

These smaller panels fill in the corners and lower sections of the bed that take direct road debris impact.

1973–87 Chevrolet Truck Bed Rear Lower Section — RH SKU: 1186 | $64.95 Lower rear bed section for the passenger side. Welds to the back of the bedside and supports the tailgate opening.

1973–87 Chevrolet Truck Bed Rear Lower Section — LH SKU: 1187 | $64.95 Driver-side counterpart to 1186. Replace both sides at the same time for a flush tailgate fit.

1973–87 Chevrolet Truck Bed Rear Corner — RH SKU: 1187A | $44.95 Rear corner of the bed box, passenger side. Often rusted independently of the main bedside panel.

Tailgates and Tailgate Hardware

The tailgate is a statement piece on any square body build. Dynacorn produces both the full tailgate panel and the hardware to restore it correctly.

1973–91 Chevrolet Truck Tailgate SKU: 1177 | $545.95 (currently out of stock — contact us for availability) Full replacement tailgate for the 1973–91 C10, including the Blazer and Suburban. One of the most requested Dynacorn chevy truck body parts. Call or chat for restock timing.

1973–91 Chevrolet Truck Tailgate Access Cover SKU: 1177B | $82.95 The lower access cover panel that closes the opening below the tailgate. In stock.

1973–89 Chevrolet Truck Tailgate Window Handle SKU: 1177A | $59.95 Replacement handle for the rear window in tailgate-equipped configurations.

1954–87 Chevrolet Truck Tailgate — Stepside with Chevrolet Script SKU: 1170 | $295.95 Stepside tailgate with the correct “Chevrolet” script embossing. Fits 1954–87 stepside configurations.

1954–87 Chevrolet Truck Tailgate Chain — Stainless Pair SKU: 1172A | $77.95 Stainless steel tailgate support chains. Stock size, correct mounting hardware.

1954–87 Chevrolet Truck Tailgate Chain — Zinc Plate SKU: 1172AB | $35.95 Zinc-plated version of the tailgate chain set. Budget-friendly option for daily drivers.

Front End Panels

The radiator support and grille surround area is a common rust point, especially where the hood hinges accumulate moisture.

1973–80 Chevrolet Truck Radiator Support Upper / Grille Panel SKU: 1099ZF | $154.95 Upper radiator support and grille surround panel for 1973–80 trucks. Supports both the hood latch and the grille assembly.

1973–80 Chevrolet Truck Radiator Support Upper / Grille Panel SKU: 1099ZE | $180.95 Alternate-fitment grille panel. Verify your specific grille style before ordering — there are two versions covering this range.

Wheel Houses

Inner rear wheel houses rot from moisture accumulating behind the bedside. When they fail, water gets directly into the cab floor area.

1973–91 Chevrolet Truck Wheelhouse Inner — RH SKU: 1099HJ | $141.95 Right-side inner wheel house for 1973–91 trucks including Blazer variants.

1973–91 Chevrolet Truck Wheelhouse Inner — LH SKU: 1099HK | $141.95 Left-side counterpart. Replace both sides to restore structural integrity to the rear cab corners.

Suspension Components

Dynacorn also produces replacement suspension components for the square body, which is particularly useful for frame-off builds or trucks with worn factory bushings.

1973–87 Chevrolet Truck Control Arm — Lower OE Style, 1/2-ton SKU: 1240 | $183.95 OE-style lower control arm for 1/2-ton (C10) configurations. Direct replacement, preserves stock geometry.

1973–87 Chevrolet Truck Control Arm — Upper OE Style SKU: 1242 | $169.95 Upper control arm, OE-style. Replace upper and lower together when rebuilding the front suspension.

Door Seals and Window Hardware

Water intrusion through door seals and window channels causes interior rust and ruined cab floors. These components are straightforward to replace and make a significant difference in how a restored truck handles weather.

1973–91 Blazer / Chevrolet Truck / GMC Door Weather Strip SKU: 1143A | $28.95 Full door weather strip for the 1973–91 generation. Fits standard cab doors.

1973–80 Chevrolet Truck Door Inner / Outer Belt Weather Strip SKU: 1143GA | $55.95 Combined inner and outer belt weather strip kit for 1973–80 trucks.

1973–87 Blazer / Chevrolet Truck / Suburban Door Outer Belt Molding — RH SKU: 1143F | $16.95 Outer door belt molding, passenger side.

1973–87 Blazer / Chevrolet Truck / Suburban Door Outer Belt Molding — LH SKU: 1143G | $16.95 Driver-side counterpart. These are best replaced as a pair.

1977–81 Chevrolet Truck Window Regulator — RH Power with Motor SKU: 1117L | $98.95 Complete power window regulator with motor for passenger-side power windows.

1977–81 Chevrolet Truck Window Regulator — LH Power SKU: 1117M | $98.95 Driver-side power window regulator.

1973–87 Chevrolet Truck Window Side Upper Molding SKU: M1155B | $29.95 Upper window surround molding for the side glass.

Interior — Dash Bezels (1978–80)

The 1978–80 trucks had a distinctive dash bezel design that is difficult to find in clean condition. Dynacorn reproduces both the A/C and non-A/C versions.

1978–80 Chevrolet Truck Dash Bezel Without A/C — Black/Silver SKU: 1146LA | $176.95

1978–80 Chevrolet Truck Dash Bezel Without A/C — Black SKU: 1146L | $137.95

1978–80 Chevrolet Truck Dash Bezel With A/C — Black/Silver SKU: 1146MA | $148.95

Verify whether your truck was equipped with factory air conditioning before ordering — the bezel cutouts are not interchangeable between A/C and non-A/C versions.

Small Parts and Hardware

These smaller components are easy to overlook but critical for a complete, correct restoration.

1973–91 Chevrolet Truck Fuel Filler Neck Cover SKU: 1107KE | $67.95 — Outer fuel filler door surround panel.

1978–91 Chevrolet Truck Fuel Door Filler SKU: 1160UE | $43.95 — Fuel filler door panel.

1977–80 Chevrolet Truck Hood Release Cable — Long SKU: 1099MK | $44.95 — Replacement hood release cable for 1977–80 trucks.

1975–81 Chevrolet Truck Hood Adjuster Bumper — Pair SKU: 1099MW | $6.95 — Hood alignment bumpers. Replace these any time you’re adjusting hood fit.

1974–84 Chevrolet Truck Radiator Overflow Cap SKU: 1099ZM | $6.95 — Replacement radiator overflow bottle cap.

1979–85 Chevrolet Truck Oil Pressure Sending Unit SKU: PYU251 | $11.95 — Direct-fit oil pressure sender for 1979–85 trucks.

Installation Difficulty by Component

Component	Difficulty	Welding Required	Notes
Bed Floor Pan (short or long)	Medium–Hard	Yes	Remove bed, fuel lines, and wiring first
Bedsides	Medium	Yes — butt weld	Dry-fit carefully before tacking; gaps matter
Bed Rear Lower Sections	Easy–Medium	Yes	Accessible from inside the bed box
Tailgate	Easy	No	Bolt-on; focus on hinge alignment
Radiator Support	Medium	Yes	Verify hood alignment before final welds
Wheelhouses	Hard	Yes	Tight clearance; allow a full day per side
Control Arms	Medium	No — bolt-on	Alignment required after installation
Door Seals	Easy	No	Adhesive or clip-on; straightforward
Dash Bezels	Easy	No	Clip or screw retention; remove trim carefully

Most bed floor and panel work is achievable by an experienced home builder with a MIG welder and body hammer set. Control arms and dash components are bolt-on replacements that require no welding.

Dynacorn Quality: What to Know Before You Order

Dynacorn has supplied the classic truck community with reproduction sheet metal since 1984. Their C10 panels are stamped from steel equivalent to or heavier than the original GM spec, and they are designed for direct fitment. That said, no aftermarket panel is a drop-in installation — you should always:

1. Dry-fit before any tack welds. Clamp the panel in place and check all gaps and alignment before the first spark.
2. Clean weld zones to bare metal. Dynacorn ships panels with a light primer coat. Strip it back where you’ll be welding.
3. Prime the back side before installation. Use a weld-through primer on mating surfaces to prevent rust from forming between the panels.
4. Treat the cavity. After welding, spray cavity wax or rust inhibitor into enclosed areas before closing them up permanently.

For more on proper rust repair procedures, the Classic Truck Restoration Community is a solid resource for technique-specific guidance.

Frequently Asked Questions

Which Dynacorn bed floor fits a 1979 Chevy C10 — the short bed or long bed?

The 1979 C10 was available in both 6.5-foot (short bed) and 8-foot (long bed) configurations. Order SKU 1188B ($914.95) for the short bed and SKU 1188A ($1,198.95) for the long bed. Confirm your bed length before ordering — the panels are not interchangeable.

Do the 1977–87 bedsides fit a 1979 truck?

Yes. SKU 1160ZG (RH) and 1160ZH (LH) cover 1977–87 short-bed fleetside trucks. The 1979 falls within that range and these are a direct fitment.

Do I need both bed rear lower sections, or just one side?

Most restorers replace both sides (SKU 1186 and 1187) at the same time. Rust typically progresses symmetrically, and replacing one side at a time often means coming back to do the other side within a season or two.

What’s the difference between the A/C and non-A/C dash bezels?

The A/C version (1146MA) has a larger center cutout to accommodate the air conditioning vents and controls. The non-A/C version (1146L / 1146LA) has a solid center panel with different control placements. Installing the wrong version will leave gaps or blocked vents — check your firewall for factory A/C brackets before ordering.

Are these parts compatible with a GMC truck as well?

Yes. The 1973–87 Chevy C10 and GMC C1500 shared the same body structure. All Dynacorn panels listed here fit both Chevrolet and GMC square body trucks.

Where to Buy Dynacorn 1973–87 Chevy Truck Parts at the Best Price

Classic Body Parts is an authorized Dynacorn dealer and carries the complete square body C10 catalog at the best prices available. We stock these parts directly, so lead times are short and you won’t be waiting weeks for a drop-shipment.

Browse all Dynacorn 1973–87 Chevy / GMC Truck body parts at Classic Body Parts →

If you have questions about fitment — bed length, cab style, A/C configuration, or short versus long bed — call or chat with us before ordering. Getting the right part the first time is a lot cheaper than return shipping on a bed floor panel.

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Classic Body Parts is an authorized Dynacorn dealer. All Dynacorn parts sold through Classic Body Parts are genuine Dynacorn products backed by Dynacorn’s quality guarantee.

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