1992 - 1999 - GMT400

The GMT400-based Suburbans were introduced in the 1992 model year. This was actually quite late compared to their pickup truck brethren - which switched platforms in the 1988 model year. Both 2WD and 4WD models, again designated ”C” and ”K”, were offered, as well as half ton and three-quarter ton (”1500” and ”2500”) models.

The base engine for all variants was the small-block 5.7 L (350 CID) V-8. The big-block 7.4 L (454 CID) V-8 was optional for the 2500 series. The optional 6.5 L Turbodiesel was available on all models - though rare on the 1500 series. Transmissions included the 4L60 4-speed automatic in the 1500 series, and the heavier duty 4L80 4-speed automatic in the 2500 series.

The GMT400 series introduced independent front suspension for a more comfortable ride compared to older models. The 2WD models used coil springs and 4WD models used torsion bars in the front suspension. All models used a live axle and leaf springs in the rear.

Trim options included a base-level version, the LS, and the LT. Interior seating arrangements allowed for either bucket or bench seating in the first row, and optional 3rd row bench. Thus it could be configured from 5- to 9-passenger seating.

There were a number of mid-life upgrades on the GMT400. These include:

• Revised interior in 1995 - including a driver-side air bag
• Vortec engines with increased power and fuel efficiency in 1996
• Passenger-side air bags and Onstar in 1997
• A new Auto4WD option in 1998

In 1998, Holden premiered the right-hand-drive version of Suburban for local Australian and Kiwi markets with either petrol or diesel motors. However, the sheer size and poor quality material doomed its first foray into the RHD market. Interestingly, General Motors chose to engineer and build the right-hand drive conversion rather than relying on Quigley 4×4, one of the approved and most experienced conversion specialists. Quigley 4×4 had done the exceptional RHD conversion utilising the high quality material and mirror-image dashboard. General Motors instead utilised the modified dashboard from 1995-2005 RHD Chevrolet Blazer.

Body_style

4-door SUV

Layout

Front engine, rear-wheel drive / four-wheel drive

Aka

GMC Suburban

Holden Suburban

Production

1992-1999

Platform

GMT400

Engine

5.7 L (350 CID) Vortec V8

7.4 L (454 CID) Vortec V8

6.5 L Turbodiesel V8

Transmission

4-speed automatic

Length

Chevrolet: 219.5 in (5575 mm)

1992-94 GMC: 218.9 in (5560 mm)

1995-96 GMC: 220.0 in (5588 mm)

Width

1992-94 Chevrolet: 73.6 in (1869 mm)

1992-94 GMC: 76.4 in (1941 mm)

1995-96 GMC: 77.0 in (1956 mm)

1995-99 Chevrolet & 1997-99 GMC: 76.7 in (1948 mm)

Height

1992-94 Chevrolet 4WD & 1997-99 GMC 2500 2WD: 73.6 in (1869 mm)

1992-94 Chevrolet 2WD: 74.9 in (1902 mm)

1992-94 GMC: 68.8 in (1748 mm)

1995-96 1500 2WD: 70.2 in (1783 mm)

1995-96 2500 2WD: 71.9 in (1826 mm)

1995-96 1500 4WD: 72.1 in (1831 mm)

1995-96 2500 4WD & 1997-99 Chevrolet 1500 4WD: 72.3 in (1836 mm)

1997-99 Chevrolet 1500 2WD: 70.7 in (1796 mm)

1997-99 Chevrolet 1500 2WD: 70.7 in (1796 mm)

1997-99 Chevrolet 2500 2WD: 73.1 in (1857 mm)

1997-99 Chevrolet 2500 4WD: 74.1 in (1882 mm)

1997-99 GMC 1500 2WD: 71.3 in (1811 mm)

1997-99 GMC 1500 4WD: 73.0 in (1854 mm)

1997-99 2500 4WD: 74.6 in (1895 mm)

wheelbase

131.5 in (3340 mm)

assembly

Janesville, Wisconsin

Arlington, Texas

Silao, Mexico

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