GMC
K15 Suburban 4WD

U.S. fuel economy and specifications from the EPA.

GMC Sierra square-body pickup truck as sold in the 1980s
16Best combined MPG1984 model year
1984–1986Model years3 with EPA ratings
14Rated configurationsDrive, transmission and engine
5.7–6.2 LEngine sizeDisplacement

Best combined MPG by model year

The highest EPA rating among each year's configurations.

1984 16 MPG
1985 16 MPG
1986 16 MPG

4 configurations.

4-Wheel or All-Wheel Drive · Automatic 4-spd

Regular gasoline · Special Purpose Vehicles

Combined MPG
12
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1986, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 5.7 L, Regular

4-Wheel or All-Wheel Drive · Automatic 4-spd

Regular gasoline · Special Purpose Vehicles

Combined MPG
12
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1986, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 5.7 L, Regular

4-Wheel or All-Wheel Drive · Manual 4-spd

Regular gasoline · Special Purpose Vehicles

Combined MPG
11
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1986, 4-Wheel or All-Wheel Drive, Manual 4-spd, 5.7 L, Regular

4-Wheel or All-Wheel Drive · Automatic 4-spd

Diesel · Special Purpose Vehicles

Combined MPG
16
Engine displacement
6.2 L
Cylinders
8
EPA listing for this configuration: 1986, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 6.2 L, Diesel

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