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1978 Chevrolet C/K Series

Indiana

$8,999

1978 Chevrolet C/K Series

Vehicle Details

Make

Chevrolet

Model

C/K Series

Year

1978

Body Type

Pickup Truck

Fuel Type

Gasoline

Description

1978 Chevrolet Grain Truck with a 20' dumb with pusher axle.

Classic Chevrolet C/K Series Buyer's Guide (1960–1987)

Full guide
R
Robert Halloran
Classic Trucks
1960–1987
~4 min read
Updated Apr 2026
The C/K naming system covers three decades of Chevrolet trucks — the 1960–1966 originals, the iconic 1967–1972 Action Line, and the beloved Square Body era. Here's how the generations differ and what to look for in each.
This guide covers
✓ 12-point inspection checklist
✓ Common issues & what to avoid
✓ In-person inspection guide
✓ Market pricing by year & condition
✓ 5 FAQs answered
✓ History & fun facts
Read the Full C/K Series Buyer's Guide

Chevrolet C/K Series Market Overview

Based on 60 Chevrolet C/K Series listings currently on ClassicCarsArena.com

60
Listed Now
$18,493
Avg. Asking Price
1960–1994
Year Range
Price Position on Our Site — Average Range
This car: $8,999
Low: $4,495 High: $74,995
Transmission Distribution
Automatic 45%
Manual 18%
Condition Distribution
Excellent 7%
Good 3%
Fair 12%
Poor 2%
Data from ClassicCarsArena.com listings Browse all 60 listings →
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Classic Chevrolet C/K Series Buyer's Guide (1960–1987)

When Chevrolet reorganized its truck lineup in 1960, the letters C and K became the foundation of an American institution. C for conventional two-wheel drive, K for four-wheel drive — simple, clear, and enduring. For twenty-seven years, the C/K series covered everything from half-ton haulers to one-ton workhorses across three distinct styling generations. If you're looking at a Chevrolet truck from this era and it isn't specifically labeled C10 or K10 in the listing, the buying principles here apply across the whole family.

What to Check Before Buying

✓
Frame rail inspection — Probe full length of both rails with screwdriver — kick-ups and mid-section
✓
Cab corners — Tap from outside; inspect lower door channel from inside for water damage
✓
Inner cab structure — Inspect behind outer cab corner for deeper rust
✓
Bed floor condition — Assess original steel, replacement wood, or aftermarket panels
✓
VIN decode — Decode VIN before inspection to verify claimed engine, transmission, trim
✓
4WD engagement (K models) — Test 2H, 4H, 4L — clean engagement with no grinding
✓
Engine cold start — Listen for valve train or bearing noise; check oil condition
✓
Transmission function — Smooth engagement in all ranges, no delayed Drive from cold
✓
Rocker panels and door bottoms — Check lower door edges and rockers for rust
✓
Firewall integrity — Check firewall for front collision evidence
✓
Cab mounts (Square Body) — Check lower rear cab panels above cab mounts for rust — common on '73–'87
✓
Axle seals (K models) — Inspect front knuckle seals and differential fill levels

Common Issues

Cab corner rust is universal across all C/K generations — the drainage channel routes water directly into the corner structure. Reproduction corners exist but inner structure must be assessed. Frame rust at kick-up sections is the structural concern. The 350 and 454 V8s are robust with enormous aftermarket support but high-mileage engines commonly need valve train work. On K-series trucks the Dana 44 front axle develops knuckle seal leaks and limited-slip wear. The TH350 and TH400 automatics are generally durable — delayed engagement from cold indicates a seal issue. Square Body trucks (1973–1987) rust at the lower rear cab panels above the cab mounts.

What to Look For

Frame rails front-to-back — probe with screwdriver at kick-up sections and mid-frame. Cab corners — tap from outside and inspect inside lower door channel; reproduction panels available. Bed floor — assess original steel vs. replaced wood or panels. Inner cab structure behind outer corners — more expensive rust damage often hidden. Engine bay firewall for accident damage. Decode VIN before visiting to verify claimed trim level and engine. Check transfer case engagement on K (4WD) models. Inspect driver's side frame behind cab on Square Body for bracket-area corrosion. Check rocker panels and door bottoms.

Price Guide

1967–1972 Action Line: short-wheelbase driver $22,000–$35,000; show quality $50,000–$80,000. Square Body 1973–1987: driver $18,000–$30,000; show $38,000–$60,000. First gen 1960–1966: undervalued at $16,000–$28,000 driver. K-series 4WD carries 10–20% premium over equivalent C-series. Big-block documented trucks command meaningful premiums.

Did You Know?

The 1967 redesign was shaped by GM's truck design studio, later GM's VP of Design. "Like a Rock" first appeared in 1991 advertising for the final Square Body years. The 1967–1972 C10 and its GMC sibling were the first American trucks offered with a factory full-floating rear axle as standard on heavy-duty variants.

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