NO LONGER AVAILABLE Listing ended Oct 5, 2026

1985 GMC 1500

$18,995

Vehicle Details

Make

GMC

Model

1500

Year

1985

VIN

AMS26434

Body Type

Pickup Truck

Fuel Type

Diesel

Engine

6.2L Diesel

Description

1985 GMC 1500 I bought this with the intentions of finishing it. It's a running driving truck. It has the original 6.2 diesel that runs great. I've put a lot of money into it. I just replaced a freeze plug, a flywheel, a torque converter, the detent cable, and just changed all the fluids.

This truck doesn't need very much to be perfect. I just put a brand new Rough Country 4' lift on it. It might have 2 miles on it. If you know these trucks you know what they are worth. If you don't like the price then move along.

I don't need any stupid comments.

GMC 1500 Buyer's Guide

Full guide

Robert Halloran

Classic Trucks

1960–1998

~3 min read

Updated Apr 2026

The GMC 1500 half-ton has always been the quiet achiever of the classic truck world, built on the same bones as the Chevy C/K but sold as the "professional" option, with distinct styling and a following that fiercely defends the difference.

This guide covers

✓ 8-point inspection checklist

✓ Common issues & what to avoid

✓ In-person inspection guide

✓ Market pricing by year & condition

✓ 4 FAQs answered

✓ History & fun facts

Read the Full 1500 Buyer's Guide

GMC 1500 Market Overview

Based on 21 GMC 1500 listings currently on ClassicCarsArena.com

Listed Now

$20,062

Avg. Asking Price

1962–1998

Year Range

Price Position on Our Site - Average Range

This car: $18,995

Low: $5,995 High: $62,995

Transmission Distribution

Automatic 81%

Manual 10%

Condition Distribution

Excellent 14%

Good 29%

Fair 5%

Poor 5%

Data from ClassicCarsArena.com listings Browse all 21 listings →

🔑

Selling a classic? Here's how

Fees, audience and photo limits compared: compare the places to sell classic cars .

List Yours →

GMC 1500 Buyer's Guide

Robert Halloran here, and I want to address something up front: yes, the GMC 1500 shares its basic architecture with the Chevrolet C/K 1500. They use the same frame, the same drivetrain options, and until the 1980s they shared most body panels. But ask any devoted GMC person whether they'd settle for a Chevy and watch their expression. The GMC carries a specific identity, a slightly more upmarket positioning, distinct styling elements, and a devoted collector base that treats the trucks as categorically different vehicles.

GMC trucks were sold through Pontiac-GMC dealerships, not Chevrolet dealers, which gave them a different customer profile from the start. They were often ordered by fleets, contractors, and buyers who specifically chose GMC for its perceived quality step-up. That perception was reinforced by subtle but real differences in trim, fit, and finish.

What to Check Before Buying

✓

GMC-Specific Trim , Verify original GMC grille, emblems, and trim are intact: Chevy substitutions are common on repaired trucks.

✓

Cab Corner Rust , Probe cab corners on Squarebody trucks, rust here is nearly universal on untreated examples.

✓

Sierra Grande Authenticity , On claimed Sierra Grande trucks, verify woodgrain trim, carpet, and high-back seats are original.

✓

Rear Cab Mounts (1973+) , Check rear cab mounts on Squarebody trucks for corrosion, causes cab-to-frame cracking.

✓

Engine/Drivetrain Codes , Decode the firewall tag, verify original engine for any claimed big-block or diesel trucks.

✓

Diesel Specifics (6.2L) , On diesel trucks, test glow plug operation, check injection pump for leaks, and verify coolant is clean.

✓

Transfer Case (4WD) , Test 4WD engagement in both high and low, listen for grinding or slipping.

✓

Frame Rails , Inspect frame rails for cracks at spring perches and outrigger welds.

Common Issues

Same as Chevy C/K: cab corner rust on Squarebody era, floor pan perforation, rear cab mount corrosion. Replacement of GMC-specific grille and badging with Chevy parts during repairs. Rare Sierra Grande interior components difficult or impossible to source correctly. 6.2L diesel injection pump failures and glow plug system issues. Transmission wear on high-mileage TH350/TH400 examples.

What to Look For

Inspect for the same structural rust issues as any classic Chevy C/K: cab corners, floor pans, and rear cab mounts on Squarebody trucks. On 1967–1972 examples, verify the GMC-specific grille and trim are original and complete, replacement with Chevy pieces is common on repaired trucks. Check Sierra Grande trim authenticity on claimed luxury models. On diesel-equipped trucks, verify the 6.2L engine hasn't been replaced with a gasoline unit. Confirm drivetrain codes for any claimed big-block trucks.

Price Guide

1967–1972 second-gen GMC 1500: $20,000–$50,000 for good drivers, $55,000–$90,000+ for Sierra Grande quality. 1973–1987 Squarebody: $12,000–$28,000 for drivers, $35,000–$65,000 for quality builds. GMC premium over equivalent Chevy: typically 10–20% for same condition. 4WD adds $3,000–$8,000. Diesel-equipped trucks: add $2,000–$5,000 premium for novelty.

Did You Know?

GMC trucks were sold through Pontiac-GMC dealers from 1968 onward, a completely separate dealer network from Chevrolet. The Sierra name was introduced as a GMC trim level in 1971, decades before it became the truck's full nameplate. GMC offered a factory-installed 6.2L diesel V8 from 1982–1988, a relatively rare option that has since developed a dedicated following among collectors.

$18,995