RST 4dr SUV 4WD5.3L 8cyl 10A · 4WD · RegularMPG 16 / 20Range 384 / 480 mi
5.3L 8cyl 10A
4WD
24.0 gal91 L
Regular
16 / 20
384 / 480 mi
Z71 4dr SUV 4WD5.3L 8cyl 10A · 4WD · RegularMPG 16 / 20Range 384 / 480 mi
5.3L 8cyl 10A
4WD
24.0 gal91 L
Regular
16 / 20
384 / 480 mi
No trim matches all of these filters.
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG (worked out from the rated MPG where the EPA range wasn't published).
How far a 2021 Chevrolet Tahoe goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 18 MPG, a full 24.0-gallon tank covers about 432 miles.
Gauge
Gallons
Highway miles
City miles
Full
24.0
480
384
3/4
18.0
360
288
1/2
12.0
240
192
1/4
6.0
120
96
1/8
3.0
60
48
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 35 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
At 24.0 gallons, the Tahoe's largest tank ranks fifth of the six 2021 SUVs compared here. The Ford Expedition carries the most (27.8 gal) and the GMC Yukon the least (24.0 gal).
Other 2021 SUVs of a similar size, one model per brand.
2021 Chevrolet Tahoe fuel system recalls
NHTSA lists 3 fuel-system recalls for the 2021 Chevrolet Tahoe, out of 16 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Storage · Tank assemblySep 18, 2025 · NHTSA 25V619000 · General Motors, LLC · 12 vehicles
General Motors, LLC (GM) is recalling certain 2021 Cadillac Escalade, 2021, 2023-2024 Chevrolet Tahoe, and 2022 and 2024 GMC Yukon vehicles equipped with a 6-cylinder diesel engine. The original fuel tank may have been replaced with an incorrect fuel tank, which can allow fuel to leak in a rollover crash.
Risk and remedy
Risk: A fuel leak in the presence of an ignition source increases the risk of a vehicle fire.
Remedy: Dealers will inspect for the correct fuel tank and replace it, if necessary, free of charge. Owner notification letters were mailed November 5, 2025. Owners may contact Cadillac customer service at 1-800-333-4223, Chevrolet customer service at 1-800-222-1020, or GMC customer service at 1-800-462-8782. GM's number for this recall is N252512770. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on September 18, 2025.
General Motors, LLC (GM) is recalling certain 2021 Cadillac Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL vehicles. The fuel pump power control module may cause the fuel pump to fail or operate intermittently, which can interrupt fuel flow to the engine, and cause an unexpected engine stall.
Risk and remedy
Risk: An engine stall increases the risk of a crash.
Remedy: Dealers will replace the fuel pump power control module, free of charge. Owner notification letters were mailed on October 14, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020; Cadillac customer service at 1-800-458-8006; or GMC customer service at 1-800-462-8782. GM's number for this recall is N212332040.
Storage · Tank assemblyFeb 11, 2021 · NHTSA 21V064000 · General Motors, LLC · 18 vehicles
General Motors, LLC (GM) is recalling certain 2021 Chevrolet Tahoe and GMC Yukon vehicles. The fuel tank assemblies may be missing adhesive between two layers of the fuel tank shell which may result in a fuel leak.
Risk and remedy
Risk: A fuel leak in the presence of an ignition source increases the risk of a fire.
Remedy: GM will notify owners, and dealers will replace the fuel tank, free of charge. The recall began March 6, 2021. Owners may contact Chevrolet customer service at 1-800-222-1020, and GMC customer service at 1-800-462-8782. GM's number for this recall is N212327720.
What is the fuel tank capacity of the 2021 Chevrolet Tahoe?
The 2021 Chevrolet Tahoe holds 24.0 gallons (91 liters) on every trim we list.
How many gallons and liters does the 2021 Chevrolet Tahoe gas tank hold?
The 2021 Chevrolet Tahoe tank holds 91 liters, or 24.0 gallons in US gallons.
Does 4WD change the 2021 Chevrolet Tahoe gas tank?
No. 4WD and RWD versions of the 2021 Chevrolet Tahoe use the same 24.0 gal tank.
How far can a 2021 Chevrolet Tahoe go on a full tank?
About 456–480 miles on the highway and 336–384 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 2021 Chevrolet Tahoe go on a quarter tank?
About 120 highway miles or 96 in town from the 24.0-gallon tank, which has roughly 6.0 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2021 Chevrolet Tahoe take?
Regular unleaded, or Premium unleaded (recommended), depending on the engine. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Chevrolet Tahoe?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 24.0-gallon tank from empty costs $102.48. It ranges from $88.80 in the Gulf Coast to $141.36 in California.
How much does a full tank of gas weigh in a 2021 Chevrolet Tahoe?
About 149 pounds for the 24.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Chevrolet Tahoe have a bigger gas tank than the GMC Yukon?
No, they match: both top out at 24.0 gallons in 2021.
Has the 2021 Chevrolet Tahoe had a fuel pump or fuel system recall?
Yes. NHTSA lists 3 fuel-system recalls for the 2021 Chevrolet Tahoe: 25V619000 (storage · tank assembly); 21V739000 (delivery · fuel pump · control/drive module); 21V064000 (storage · tank assembly). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
Sources
Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).