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Specifications Comparison: 2003 GMC Sierra 1500 vs 2021 GMC Sierra 1500

Researched By The AutoPadre Staff

Gas Mileage

2003 GMC Sierra 1500

Fuel Mileage (Imp.)

Trim Eng. Drive train MPG City MPG Hwy MPG Combined
1500 Extended CabV6RWD152017.5
1500 Extended CabV8RWD111412.5
1500 Extended Cab SLEV8RWD111412.5
1500 Extended Cab SLEV84WD101211
1500 Extended Cab SLTV8RWD111412.5
1500 Extended Cab SLTV84WD101211
1500 Regular CabV6RWD151414.5
1500 Regular CabV84WD101211
1500 Regular Cab SLEV8RWD151414.5
1500 Regular Cab SLEV84WD101211
Extended Cab DenaliV8AWD121614

2021 GMC Sierra 1500

Fuel Mileage (Imp.)

Trim Eng. Drive train MPG City MPG Hwy MPG Combined
Crew Cab4.3L V6RWD162118.5
Crew Cab5.3L V8RWD142117.5
Crew Cab2.7LRWD142117.5
Crew Cab4.3L V64WD152017.5
Crew Cab5.3L V84WD142017
Crew Cab2.7L4WD142017
Crew Cab AT45.3L V84WD152118
Crew Cab AT43.0L I64WD222624
Crew Cab AT46.2L V84WD222624
Crew Cab Denali5.3L V8RWD152218.5
Crew Cab Denali3.0L I6RWD233026.5
Crew Cab Denali5.3L V84WD152118
Crew Cab Denali3.0L I64WD222624
Crew Cab Denali6.2L V84WD222624
Crew Cab Elevation2.7LRWD202321.5
Crew Cab Elevation5.3L V8RWD152218.5
Crew Cab Elevation3.0L I6RWD152218.5
Crew Cab Elevation 3VL2.7L4WD182119.5
Crew Cab Elevation2.7L4WD182119.5
Crew Cab Elevation5.3L V84WD142017
Crew Cab Elevation3.0L I64WD142017
Crew Cab SLE2.7LRWD202321.5
Crew Cab SLE5.3L V8RWD152218.5
Crew Cab SLE3.0L I6RWD152218.5
Crew Cab SLE2.7L4WD182119.5
Crew Cab SLE5.3L V84WD142017
Crew Cab SLE3.0L I64WD142017
Crew Cab SLT5.3L V8RWD152218.5
Crew Cab SLT3.0L I6RWD233026.5
Crew Cab SLT5.3L V84WD142017
Crew Cab SLT5.3L I64WD152118
Crew Cab SLT3.0L V84WD152118
Extended Cab4.3L V6RWD162118.5
Extended Cab5.3L V8RWD142117.5
Extended Cab2.7LRWD142117.5
Extended Cab4.3L V64WD152017.5
Extended Cab5.3L V84WD142017
Extended Cab2.7L4WD142017
Extended Cab Elevation2.7LRWD202321.5
Extended Cab Elevation5.3L V8RWD152218.5
Extended Cab Elevation3.0L I6RWD152218.5
Extended Cab Elevation 3VL2.7L4WD182119.5
Extended Cab Elevation2.7L4WD182119.5
Extended Cab Elevation5.3L V84WD142017
Extended Cab Elevation3.0L I64WD142017
Extended Cab SLE2.7LRWD202321.5
Extended Cab SLE5.3L V8RWD152218.5
Extended Cab SLE3.0L I6RWD152218.5
Extended Cab SLE2.7L4WD182119.5
Extended Cab SLE5.3L V84WD142017
Extended Cab SLE3.0L I64WD142017
Regular Cab4.3L V6RWD162118.5
Regular Cab5.3L V8RWD142117.5
Regular Cab4.3L V64WD152017.5
Regular Cab5.3L V84WD142017

2003 GMC Sierra 1500

Fuel Mileage (Metric)

Trim Eng. Drive train L/100km City L/100km Hwy L/100km Combined
1500 Extended CabV6RWD16.012.013.0
1500 Extended CabV8RWD21.017.019.0
1500 Extended Cab SLEV8RWD21.017.019.0
1500 Extended Cab SLEV84WD24.020.021.0
1500 Extended Cab SLTV8RWD21.017.019.0
1500 Extended Cab SLTV84WD24.020.021.0
1500 Regular CabV6RWD16.017.016.0
1500 Regular CabV84WD24.020.021.0
1500 Regular Cab SLEV8RWD16.017.016.0
1500 Regular Cab SLEV84WD24.020.021.0
Extended Cab DenaliV8AWD20.015.017.0

2021 GMC Sierra 1500

Fuel Mileage (Metric)

Trim Eng. Drive train L/100km City L/100km Hwy L/100km Combined
Crew Cab4.3L V6RWD15.011.013.0
Crew Cab5.3L V8RWD17.011.013.0
Crew Cab2.7LRWD17.011.013.0
Crew Cab4.3L V64WD16.012.013.0
Crew Cab5.3L V84WD17.012.014.0
Crew Cab2.7L4WD17.012.014.0
Crew Cab AT45.3L V84WD16.011.013.0
Crew Cab AT43.0L I64WD11.09.010.0
Crew Cab AT46.2L V84WD11.09.010.0
Crew Cab Denali5.3L V8RWD16.011.013.0
Crew Cab Denali3.0L I6RWD10.08.09.0
Crew Cab Denali5.3L V84WD16.011.013.0
Crew Cab Denali3.0L I64WD11.09.010.0
Crew Cab Denali6.2L V84WD11.09.010.0
Crew Cab Elevation2.7LRWD12.010.011.0
Crew Cab Elevation5.3L V8RWD16.011.013.0
Crew Cab Elevation3.0L I6RWD16.011.013.0
Crew Cab Elevation 3VL2.7L4WD13.011.012.0
Crew Cab Elevation2.7L4WD13.011.012.0
Crew Cab Elevation5.3L V84WD17.012.014.0
Crew Cab Elevation3.0L I64WD17.012.014.0
Crew Cab SLE2.7LRWD12.010.011.0
Crew Cab SLE5.3L V8RWD16.011.013.0
Crew Cab SLE3.0L I6RWD16.011.013.0
Crew Cab SLE2.7L4WD13.011.012.0
Crew Cab SLE5.3L V84WD17.012.014.0
Crew Cab SLE3.0L I64WD17.012.014.0
Crew Cab SLT5.3L V8RWD16.011.013.0
Crew Cab SLT3.0L I6RWD10.08.09.0
Crew Cab SLT5.3L V84WD17.012.014.0
Crew Cab SLT5.3L I64WD16.011.013.0
Crew Cab SLT3.0L V84WD16.011.013.0
Extended Cab4.3L V6RWD15.011.013.0
Extended Cab5.3L V8RWD17.011.013.0
Extended Cab2.7LRWD17.011.013.0
Extended Cab4.3L V64WD16.012.013.0
Extended Cab5.3L V84WD17.012.014.0
Extended Cab2.7L4WD17.012.014.0
Extended Cab Elevation2.7LRWD12.010.011.0
Extended Cab Elevation5.3L V8RWD16.011.013.0
Extended Cab Elevation3.0L I6RWD16.011.013.0
Extended Cab Elevation 3VL2.7L4WD13.011.012.0
Extended Cab Elevation2.7L4WD13.011.012.0
Extended Cab Elevation5.3L V84WD17.012.014.0
Extended Cab Elevation3.0L I64WD17.012.014.0
Extended Cab SLE2.7LRWD12.010.011.0
Extended Cab SLE5.3L V8RWD16.011.013.0
Extended Cab SLE3.0L I6RWD16.011.013.0
Extended Cab SLE2.7L4WD13.011.012.0
Extended Cab SLE5.3L V84WD17.012.014.0
Extended Cab SLE3.0L I64WD17.012.014.0
Regular Cab4.3L V6RWD15.011.013.0
Regular Cab5.3L V8RWD17.011.013.0
Regular Cab4.3L V64WD16.012.013.0
Regular Cab5.3L V84WD17.012.014.0

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