1990 GMC Sierra 1500 2WD MPG and Fuel Economy

On this page, you will find a complete guide to the miles per gallon and fuel efficiency data for the 1990 GMC Sierra 1500 2WD.

The 1990 GMC Sierra 1500 2WD has 11 model options: Automatic 3-spd 6-cyl, 4.3 L, Manual 4-spd 6-cyl, 4.3 L, Manual 5-spd 6-cyl, 4.3 L, Automatic 3-spd 8-cyl, 5.0 L, Automatic 4-spd 8-cyl, 5.0 L, Manual 5-spd 8-cyl, 5.0 L, Automatic 4-spd 8-cyl, 5.7 L, Manual 4-spd 8-cyl, 5.7 L, Manual 5-spd 8-cyl, 5.7 L, Automatic 4-spd 8-cyl, 6.2 L and Manual 4-spd 8-cyl, 6.2 L.

The 1990 GMC Sierra 1500 2WD Automatic 3-spd 6-cyl, 4.3 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 4-spd 6-cyl, 4.3 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 5-spd 6-cyl, 4.3 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Automatic 3-spd 8-cyl, 5.0 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 5.0 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 5-spd 8-cyl, 5.0 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 5.7 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 4-spd 8-cyl, 5.7 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 5-spd 8-cyl, 5.7 L runs on regular gasoline and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 6.2 L runs on diesel and is in the Standard Pickup Trucks car class.

The 1990 GMC Sierra 1500 2WD Manual 4-spd 8-cyl, 6.2 L runs on diesel and is in the Standard Pickup Trucks car class.

🛣 How Many Miles per Gallon (MPG) Does a 1990 GMC Sierra 1500 2WD Get?

Across all models, the combined average MPG for the 1990 GMC Sierra 1500 2WD is 16 miles per gallon.

The table below breaks down the MPG for each model option:

Model Option	Combined MPG	City MPG	Highway MPG
Automatic 3-spd 6-cyl, 4.3 L	17	16	19
Manual 4-spd 6-cyl, 4.3 L	17	16	19
Manual 5-spd 6-cyl, 4.3 L	18	16	22
Automatic 3-spd 8-cyl, 5.0 L	14	14	15
Automatic 4-spd 8-cyl, 5.0 L	15	14	18
Manual 5-spd 8-cyl, 5.0 L	15	14	19
Automatic 4-spd 8-cyl, 5.7 L	15	14	18
Manual 4-spd 8-cyl, 5.7 L	12	11	13
Manual 5-spd 8-cyl, 5.7 L	14	12	17
Automatic 4-spd 8-cyl, 6.2 L	18	16	22
Manual 4-spd 8-cyl, 6.2 L	18	17	20

💵 What is the Average Yearly Fuel Cost for a 1990 GMC Sierra 1500 2WD?

The average fuel costs for all models of the 1990 GMC Sierra 1500 2WD is $4,186.

The average fuel costs have been estimated by government regulators based on 15,000 miles driven per year, using regular gasoline, and a split of 55% city driving and 45% highway driving.

Comparing a 1990 GMC Sierra 1500 2WD to an average vehicle over 5 years, you will spend $9,432 more on fuel.

The table below shows the fuel costs and 5-year save/spend for each model option:

Model Option	Fuel Cost	5-Year Save/Spend
Automatic 3-spd 6-cyl, 4.3 L	$3,700	spend $7,000 more
Manual 4-spd 6-cyl, 4.3 L	$3,700	spend $7,000 more
Manual 5-spd 6-cyl, 4.3 L	$3,500	spend $6,000 more
Automatic 3-spd 8-cyl, 5.0 L	$4,450	spend $10,750 more
Automatic 4-spd 8-cyl, 5.0 L	$4,150	spend $9,250 more
Manual 5-spd 8-cyl, 5.0 L	$4,150	spend $9,250 more
Automatic 4-spd 8-cyl, 5.7 L	$4,150	spend $9,250 more
Manual 4-spd 8-cyl, 5.7 L	$5,200	spend $14,500 more
Manual 5-spd 8-cyl, 5.7 L	$4,450	spend $10,750 more
Automatic 4-spd 8-cyl, 6.2 L	$4,300	spend $10,000 more
Manual 4-spd 8-cyl, 6.2 L	$4,300	spend $10,000 more

🛢 How Many Barrels of Petroleum Does a 1990 GMC Sierra 1500 2WD Consume?

Across all models, the average number barrels of petroleum that the 1990 GMC Sierra 1500 2WD will consume in one year is 20 barrels.

The majority of the world's petroleum is sourced from countries like Saudi Arabia, Russia, Iraq, and the United States.

Model Option	Barrels
Automatic 3-spd 6-cyl, 4.3 L	18
Manual 4-spd 6-cyl, 4.3 L	18
Manual 5-spd 6-cyl, 4.3 L	17
Automatic 3-spd 8-cyl, 5.0 L	21
Automatic 4-spd 8-cyl, 5.0 L	20
Manual 5-spd 8-cyl, 5.0 L	20
Automatic 4-spd 8-cyl, 5.7 L	20
Manual 4-spd 8-cyl, 5.7 L	25
Manual 5-spd 8-cyl, 5.7 L	21
Automatic 4-spd 8-cyl, 6.2 L	20
Manual 4-spd 8-cyl, 6.2 L	20

💨 How Many Grams of CO₂ Does a 1990 GMC Sierra 1500 2WD Emit?

The 1990 GMC Sierra 1500 2WD will emit an average of about -15,000 grams of CO₂ per year.

🌳 To help you understand the impact of this, a normal tree will absorb around 21,000 grams of CO₂ per year. This means that roughly 1 tree would be needed to offset emissions from the 1990 GMC Sierra 1500 2WD.

Overview

The tables below cover all of the miles per gallon, engine specifications, and emission details we have for the 11 1990 GMC Sierra 1500 2WD model options.

Automatic 3-spd 6-cyl, 4.3 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Automatic 3-spd 6-cyl, 4.3 L:

City MPG	16
Highway MPG	19
Combined MPG	17
Save/Spend vs Average Car	Spend $7,000
Fuel Cost	$3,700
Fuel Type 1	Regular
Barrels of Petroleum	18
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	6
Displacement	4.3
Transmission	Automatic 3-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 4-spd 6-cyl, 4.3 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 4-spd 6-cyl, 4.3 L:

City MPG	16
Highway MPG	19
Combined MPG	17
Save/Spend vs Average Car	Spend $7,000
Fuel Cost	$3,700
Fuel Type 1	Regular
Barrels of Petroleum	18
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	6
Displacement	4.3
Transmission	Manual 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 5-spd 6-cyl, 4.3 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 5-spd 6-cyl, 4.3 L:

City MPG	16
Highway MPG	22
Combined MPG	18
Save/Spend vs Average Car	Spend $6,000
Fuel Cost	$3,500
Fuel Type 1	Regular
Barrels of Petroleum	17
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	6
Displacement	4.3
Transmission	Manual 5-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Automatic 3-spd 8-cyl, 5.0 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Automatic 3-spd 8-cyl, 5.0 L:

City MPG	14
Highway MPG	15
Combined MPG	14
Save/Spend vs Average Car	Spend $10,750
Fuel Cost	$4,450
Fuel Type 1	Regular
Barrels of Petroleum	21
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5
Transmission	Automatic 3-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Automatic 4-spd 8-cyl, 5.0 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 5.0 L:

City MPG	14
Highway MPG	18
Combined MPG	15
Save/Spend vs Average Car	Spend $9,250
Fuel Cost	$4,150
Fuel Type 1	Regular
Barrels of Petroleum	20
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5
Transmission	Automatic 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 5-spd 8-cyl, 5.0 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 5-spd 8-cyl, 5.0 L:

City MPG	14
Highway MPG	19
Combined MPG	15
Save/Spend vs Average Car	Spend $9,250
Fuel Cost	$4,150
Fuel Type 1	Regular
Barrels of Petroleum	20
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5
Transmission	Manual 5-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Automatic 4-spd 8-cyl, 5.7 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 5.7 L:

City MPG	14
Highway MPG	18
Combined MPG	15
Save/Spend vs Average Car	Spend $9,250
Fuel Cost	$4,150
Fuel Type 1	Regular
Barrels of Petroleum	20
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5.7
Transmission	Automatic 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 4-spd 8-cyl, 5.7 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 4-spd 8-cyl, 5.7 L:

City MPG	11
Highway MPG	13
Combined MPG	12
Save/Spend vs Average Car	Spend $14,500
Fuel Cost	$5,200
Fuel Type 1	Regular
Barrels of Petroleum	25
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5.7
Transmission	Manual 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 5-spd 8-cyl, 5.7 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 5-spd 8-cyl, 5.7 L:

City MPG	12
Highway MPG	17
Combined MPG	14
Save/Spend vs Average Car	Spend $10,750
Fuel Cost	$4,450
Fuel Type 1	Regular
Barrels of Petroleum	21
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	5.7
Transmission	Manual 5-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Automatic 4-spd 8-cyl, 6.2 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Automatic 4-spd 8-cyl, 6.2 L:

City MPG	16
Highway MPG	22
Combined MPG	18
Save/Spend vs Average Car	Spend $10,000
Fuel Cost	$4,300
Fuel Type 1	Diesel
ATV Type	Diesel
Barrels of Petroleum	20
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	6.2
Transmission	Automatic 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Manual 4-spd 8-cyl, 6.2 L

The table below contains all of the details we have for the 1990 GMC Sierra 1500 2WD Manual 4-spd 8-cyl, 6.2 L:

City MPG	17
Highway MPG	20
Combined MPG	18
Save/Spend vs Average Car	Spend $10,000
Fuel Cost	$4,300
Fuel Type 1	Diesel
ATV Type	Diesel
Barrels of Petroleum	20
Grams of CO₂	-15,000
Trees Needed to Offset	-1
Drive	Rear-Wheel Drive
Cylinders	8
Displacement	6.2
Transmission	Manual 4-spd
Vehicle Class	Standard Pickup Trucks
Start/Stop?	No
Supercharged?	No
Turbocharged?	No

Link To or Reference This Page

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"1990 GMC Sierra 1500 2WD MPG and Fuel Economy." MPG Buddy. Accessed on January 3, 2026. https://mpgbuddy.com/cars/gmc/sierra-1500-2wd/1990.
"1990 GMC Sierra 1500 2WD MPG and Fuel Economy." MPG Buddy, https://mpgbuddy.com/cars/gmc/sierra-1500-2wd/1990. Accessed January 3, 2026.
1990 GMC Sierra 1500 2WD MPG and Fuel Economy. MPG Buddy. Retrieved from https://mpgbuddy.com/cars/gmc/sierra-1500-2wd/1990.