#1537

GMC C2500 Sierra

🇺🇸 United States ·1989–1992· pickup

petroldiesel

what the fuel types mean

petrol Cheapest to buy, simple, but fuel is expensive in NL.
diesel Frugal on long trips, but NL road tax is much higher and city bans are growing.

spec sheet

built: 1989–1992
body: pickup
engine: 4.3 L–6.2 L
cylinders: 6–8
turbo: no
power: —
drive: rear-wheel drive
gearbox: automatic, manual
seats: —
doors: —
weight: —
fuel use: —
CO₂: —
US rating: 12–19 mpg
EV range: —
US size class: Standard Pickup Trucks
avg new price NL: —

Ranges cover every version ever sold. Blank means the sources don't say.

🇺🇸 US versions (46)

Every version the EPA tested, model years 1989–1992. mpg is combined; L/100 km converted.

year	version	engine	gearbox	drive	fuel	mpg	L/100
1992	C2500 Sierra 2WD	4.3 L 6 cyl	Automatic 4-spd	RWD	Regular	16	14.7
1992	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 5-spd	RWD	Regular	17	13.8
1992	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 5-spd	RWD	Regular	16	14.7
1992	C2500 Sierra 2WD	5.0 L 8 cyl	Automatic 4-spd	RWD	Regular	14	16.8
1992	C2500 Sierra 2WD	5.0 L 8 cyl	Manual 5-spd	RWD	Regular	15	15.7
1992	C2500 Sierra 2WD	5.7 L 8 cyl	Automatic 4-spd	RWD	Regular	14	16.8
1992	C2500 Sierra 2WD	5.7 L 8 cyl	Manual 4-spd	RWD	Regular	13	18.1
1992	C2500 Sierra 2WD	5.7 L 8 cyl	Manual 5-spd	RWD	Regular	14	16.8
1992	C2500 Sierra 2WD	6.2 L 8 cyl	Automatic 4-spd	RWD	Diesel	18	13.1
1992	C2500 Sierra 2WD	6.2 L 8 cyl	Manual 5-spd	RWD	Diesel	19	12.4
1991	C2500 Sierra 2WD	4.3 L 6 cyl	Automatic 4-spd	RWD	Regular	16	14.7
1991	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 4-spd	RWD	Regular	17	13.8
1991	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 5-spd	RWD	Regular	17	13.8
1991	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 5-spd	RWD	Regular	17	13.8
1991	C2500 Sierra 2WD	5.0 L 8 cyl	Automatic 4-spd	RWD	Regular	14	16.8
1991	C2500 Sierra 2WD	5.0 L 8 cyl	Manual 5-spd	RWD	Regular	15	15.7
1991	C2500 Sierra 2WD	5.7 L 8 cyl	Automatic 4-spd	RWD	Regular	14	16.8
1991	C2500 Sierra 2WD	5.7 L 8 cyl	Manual 4-spd	RWD	Regular	13	18.1
1991	C2500 Sierra 2WD	5.7 L 8 cyl	Manual 5-spd	RWD	Regular	13	18.1
1991	C2500 Sierra 2WD	5.7 L 8 cyl	Manual 5-spd	RWD	Regular	14	16.8
1991	C2500 Sierra 2WD	6.2 L 8 cyl	Automatic 4-spd	RWD	Diesel	17	13.8
1991	C2500 Sierra 2WD	6.2 L 8 cyl	Manual 4-spd	RWD	Diesel	17	13.8
1991	C2500 Sierra 2WD	6.2 L 8 cyl	Manual 5-spd	RWD	Diesel	19	12.4
1990	C2500 Sierra 2WD	4.3 L 6 cyl	Automatic 3-spd	RWD	Regular	15	15.7
1990	C2500 Sierra 2WD	4.3 L 6 cyl	Manual 4-spd	RWD	Regular	15	15.7

Sources: fueleconomy.gov.Updated 2026-10-24.