GMC
K15 Pickup 4WD

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

GMC Sierra square-body pickup truck as sold in the 1980s
18Best combined MPG1984 model year
1984–1988Model years4 with EPA ratings
49Rated configurationsDrive, transmission and engine
4.1–6.2 LEngine sizeDisplacement

Best combined MPG by model year

The highest EPA rating among each year's configurations.

1984 18 MPG
1985 17 MPG
1986 17 MPG
1987 No rating
1988 17 MPG

12 configurations.

4-Wheel or All-Wheel Drive · Automatic 3-spd

Regular gasoline · Standard Pickup Trucks

Combined MPG
14
Engine displacement
4.3 L
Cylinders
6
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 3-spd, 4.3 L, Regular

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

Regular gasoline · Standard Pickup Trucks

Combined MPG
16
Engine displacement
4.3 L
Cylinders
6
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 4.3 L, Regular

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

Regular gasoline · Standard Pickup Trucks

Combined MPG
15
Engine displacement
4.3 L
Cylinders
6
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 4-spd, 4.3 L, Regular

4-Wheel or All-Wheel Drive · Manual 5-spd

Regular gasoline · Standard Pickup Trucks

Combined MPG
16
Engine displacement
4.3 L
Cylinders
6
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 5-spd, 4.3 L, Regular

4-Wheel or All-Wheel Drive · Automatic 3-spd

Regular gasoline · Standard Pickup Trucks

Combined MPG
12
Engine displacement
5.0 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 3-spd, 5.0 L, Regular

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

Regular gasoline · Standard Pickup Trucks

Combined MPG
14
Engine displacement
5.0 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 5.0 L, Regular

4-Wheel or All-Wheel Drive · Manual 5-spd

Regular gasoline · Standard Pickup Trucks

Combined MPG
14
Engine displacement
5.0 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 5-spd, 5.0 L, Regular

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

Regular gasoline · Standard Pickup Trucks

Combined MPG
13
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 5.7 L, Regular

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

Regular gasoline · Standard Pickup Trucks

Combined MPG
13
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 4-spd, 5.7 L, Regular

4-Wheel or All-Wheel Drive · Manual 5-spd

Regular gasoline · Standard Pickup Trucks

Combined MPG
13
Engine displacement
5.7 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 5-spd, 5.7 L, Regular

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

Diesel · Standard Pickup Trucks

Combined MPG
17
Engine displacement
6.2 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Automatic 4-spd, 6.2 L, Diesel

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

Diesel · Standard Pickup Trucks

Combined MPG
16
Engine displacement
6.2 L
Cylinders
8
EPA listing for this configuration: 1988, 4-Wheel or All-Wheel Drive, Manual 4-spd, 6.2 L, Diesel

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