EPA Vehicle Specs

1998 GMC Sierra Specs, MPG & Trims

EPA fuel-economy data and specifications for the 1998 GMC Sierra (13–18 MPG combined) across 18 listed configurations.

Overview

Body class
Standard Pickup Trucks 2WD, Standard Pickup Trucks 4WD
Drive
Rear-Wheel Drive, 4-Wheel or All-Wheel Drive
Engine
6-cyl, 4.3 L; 8-cyl, 5.0 L; 8-cyl, 5.7 L; 8-cyl, 6.5 L
Fuel type
Regular Gasoline, Diesel
Combined MPG
13–18 MPG
Annual fuel cost
$3,700–$6,400
Configurations
18

MPG & fuel economy

City, highway and combined values below are EPA estimates. Where a powertrain has several configurations, the table shows the lowest–highest reported value. Electric configurations use MPGe.

EPA city, highway and combined ratings by powertrain for the 1998 GMC Sierra. Electric configurations are rated in MPGe.
PowertrainCityHighwayCombinedAnnual fuel costCO2
8-cyl 6.5 L · Diesel · 4-Wheel or All-Wheel Drive131715$6,400—
8-cyl 6.5 L · Diesel · Rear-Wheel Drive131715$6,400—
6-cyl 4.3 L · Regular Gasoline · 4-Wheel or All-Wheel Drive1418–1916$4,200—
8-cyl 5.0 L · Regular Gasoline · 4-Wheel or All-Wheel Drive121714$4,800—
8-cyl 5.7 L · Regular Gasoline · 4-Wheel or All-Wheel Drive11–121613$5,150—
6-cyl 4.3 L · Regular Gasoline · Rear-Wheel Drive14–1619–2116–18$3,700–$4,200—
8-cyl 5.0 L · Regular Gasoline · Rear-Wheel Drive13–1417–1815$4,450—
8-cyl 5.7 L · Regular Gasoline · Rear-Wheel Drive12–1317–1814$4,800—

Configurations & engine comparison

Each row is one configuration/engine combination reported by the EPA for this model year. Missing EPA values are shown as —.

Every EPA-listed configuration for the 1998 GMC Sierra (18 rows). "Configuration" is the EPA configuration/engine name.
Configuration / engineDriveTransmissionCyl.Displ. (L)Fuel typeCityHwyComb.Annual cost
Sierra 1500 2WDRear-Wheel DriveAutomatic 4-spd64.3Regular Gasoline141916$4,200
Sierra 1500 2WDRear-Wheel DriveAutomatic 4-spd85.0Regular Gasoline141815$4,450
Sierra 1500 2WDRear-Wheel DriveAutomatic 4-spd85.7Regular Gasoline131714$4,800
Sierra 1500 2WDRear-Wheel DriveManual 5-spd64.3Regular Gasoline162118$3,700
Sierra 1500 2WDRear-Wheel DriveManual 5-spd85.0Regular Gasoline131815$4,450
Sierra 1500 2WDRear-Wheel DriveManual 5-spd85.7Regular Gasoline121814$4,800
Sierra 1500 4WD4-Wheel or All-Wheel DriveAutomatic 4-spd64.3Regular Gasoline141816$4,200
Sierra 1500 4WD4-Wheel or All-Wheel DriveAutomatic 4-spd85.0Regular Gasoline121714$4,800
Sierra 1500 4WD4-Wheel or All-Wheel DriveAutomatic 4-spd85.7Regular Gasoline121613$5,150
Sierra 1500 4WD4-Wheel or All-Wheel DriveAutomatic 4-spd86.5Diesel131715$6,400
Sierra 1500 4WD4-Wheel or All-Wheel DriveManual 5-spd64.3Regular Gasoline141916$4,200
Sierra 1500 4WD4-Wheel or All-Wheel DriveManual 5-spd85.0Regular Gasoline121714$4,800
Sierra 1500 4WD4-Wheel or All-Wheel DriveManual 5-spd85.7Regular Gasoline111613$5,150
Sierra 2500 2WDRear-Wheel DriveAutomatic 4-spd85.0Regular Gasoline141815$4,450
Sierra 2500 2WDRear-Wheel DriveAutomatic 4-spd85.7Regular Gasoline131714$4,800
Sierra 2500 2WDRear-Wheel DriveAutomatic 4-spd86.5Diesel131715$6,400
Sierra 2500 2WDRear-Wheel DriveManual 5-spd85.0Regular Gasoline131715$4,450
Sierra 2500 2WDRear-Wheel DriveManual 5-spd85.7Regular Gasoline121814$4,800

Frequently asked questions

What is the combined MPG of the 1998 GMC Sierra?

According to EPA data, the 1998 GMC Sierra is rated at 13–18 MPG combined for its conventional-fuel configurations.

How many cylinders does the 1998 GMC Sierra have?

The EPA data lists 6 and 8 cylinders across its configurations.

What fuel type does the 1998 GMC Sierra use?

It is offered with Regular Gasoline and Diesel.

What is the annual fuel cost of the 1998 GMC Sierra?

The EPA estimates annual fuel costs ranging from $3,700 to $6,400.

Other Sierra years

20262025202420232022202120202019201820172016201520142013201220112010200920082007200620052004200320022001200019991998199719961995199419931992199119901989

More GMC models

Similar Standard Pickup Trucks 2WD models