Technical register for agricultural, construction and commercial machinery · sourced data
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GMC SIERRA CLASSIC

Built: 1977-1987 · Series: SIERRA

More machines from model year 1977

Source: https://commons.wikimedia.org/wiki/File:1980_GMC_Sierra_Clas

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The SIERRA CLASSIC from GMC is part of the SIERRA series. Production: 1977-1987. The engine has 8 cylinders, with a displacement of 7,439 cm³. The machine is 6,450 mm long and 2,490 mm wide. The unladen weight is 2,842 kg. The wheelbase measures 4,260 mm. The gross vehicle weight is 4,536 kg. The machine runs on 6 wheels. The SIERRA series covers 63 models. Unladen weight within it ranges from 2,095 to 3,810 kg; the SIERRA CLASSIC sits in the middle of that range with 2,842 kg. Its immediate neighbours are the Sierra 2500HD Crew Cab below it with 2,800 kg and the SIERRA 4WD above it with 2,844 kg. Gross vehicle weight within it ranges from 3,500 to 6,150 kg; here the SIERRA CLASSIC sits in the lower part of that range with 4,536 kg. 1090 GMC models across 32 series are on record.

GMC Sierra – Heavy Duty pickup of the 2500 and 3500 class: six- and eight-cylinder engines from 110 to 332 kW, 3.0 to 7.4-litre displacement, up to 6,150 kg gross weight

GMC has run the Sierra since 1987 as a standalone pickup model, technically related to the Chevrolet Silverado, and since 1999 as a fully separate range within General Motors; the Sierra family is built at, among other plants, Fort Wayne (Indiana), Flint (Michigan) and Silao (Mexico). The 1500, 2500 and 3500 numbers order payload class, the HD (Heavy Duty) suffix denotes the reinforced three-quarter- and one-ton versions with leaf-sprung rear axles, and trim levels such as SLE, SLT, AT4 and Denali range from work-focused to luxury specification.

Read on 3 more paragraphs

The register lists 63 versions with 110 to 332 kW from six- and eight-cylinder engines of 2,990 to 7,441 cm³, unladen weights of 2,095 to 3,810 kg, gross vehicle weights of 3,500 to 6,150 kg and widths of 1,950 to 2,490 mm.

In the Heavy Duty class the Sierra competes chiefly with the Ford F-250/F-350 and Ram 2500/3500 on towing and payload capacity; typical uses are construction and agriculture, horse and boat transport, and commercial fleets, where the Duramax turbodiesel paired with the Allison automatic is valued as a tow vehicle.

When buying used, check the injection pump, turbocharger and exhaust aftertreatment (DEF) on Duramax diesels, cylinder deactivation and oil consumption on the petrol V8s, frame corrosion at the rear leaf-spring mounts generally, and wear on the hitch ball and trailer wiring on frequently used tow vehicles; parts run through the GMC and GM parts network.

Sources: SpecCodex register, model data: GMC Sierra, GMC

Technical data

Engine

Cylinders8correct
Displacement7,439 cm³correct

Dimensions and weights

Length6,450 mmcorrect
Width2,490 mmcorrect
Wheelbase4,260 mmcorrect
Unladen weight2,842 kgcorrect
Gross vehicle weight4,536 kgcorrect

Drivetrain and chassis

Wheels6correct

Frequently asked questions

How much does the GMC SIERRA CLASSIC weigh?

The unladen weight is 2,842 kg.

What is the gross vehicle weight of the GMC SIERRA CLASSIC?

4,536 kg.

What engine does the GMC SIERRA CLASSIC have?

8 cylinders, 7,439 cm³ displacement.

What are the dimensions of the GMC SIERRA CLASSIC?

6,450 mm × 2,490 mm.

When was the GMC SIERRA CLASSIC built?

Production years: 1977-1987.

What to check before buying

  • Check the hour meter against the service records — a replaced instrument is the most common gap.
  • Compare the data plate and chassis number with the papers.
  • Check the weights in the papers against the figures here — attachments change them.
  • Ask about parts availability for this build year — the running costs hang on it.

A general list for this type of machine — no substitute for an inspection or an appraiser.

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This page carries 10 individual figures for this model. They come from 2 recorded sources; every figure can be traced there. What we cannot document is not here — we leave gaps open rather than estimate them.

The technical data on this page comes from official vehicle registration records (RDW/Traficom), not from the manufacturer.

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Other models in this series

SIERRA 1500 AT4X AEV-Edition W

SIERRA 1500 DENALI-W

SIERRA 1500 ELEVATION-W

SIERRA 2500 CREW PICK UP/3900

SIERRA 2500 HD 4x4 CREW CAB/3890

SIERRA 2500 HD 4x4 CREW CAB/4040

SIERRA 2500 HD Denali

SIERRA 2500 HD EXTENDED CAB-4X4

SIERRA 2500 K2500 Denali

SIERRA 2500 PICK UP-GK24J-4X4/3340

SIERRA 2500 PICKUP FK29S-4X4/359

SIERRA 2500 PICKUP-GK29J-4X4/3960

Sources: [1] [2]

Truck in 3D section

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