2008 GMC Envoy Gas Tank Size & Fuel Capacity
Fuel tank capacity
22.0gal · 83 L
The 2008 GMC Envoy has a fuel tank capacity of 22.0 gallons (83 liters) on every trim.
A full tank is good for roughly 418–440 highway miles or 286–308 miles around town, going by the EPA ratings.
22.0 gal · Bigger than 69% of 2008 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2008 GMC Envoy fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
- Engine
- no difference
All 6 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| Denali 4dr SUV 5.3L 8cyl 4A · RWD MPG 14 / 20Range 308 / 440 mi | 5.3L 8cyl 4A | RWD | 22.0 gal83 L | 14 / 20 | 308 / 440 mi | |
| Denali 4dr SUV 4WD 5.3L 8cyl 4A · 4WD MPG 13 / 19Range 286 / 418 mi | 5.3L 8cyl 4A | 4WD | 22.0 gal83 L | 13 / 19 | 286 / 418 mi | |
| SLE 4dr SUV 4.2L 6cyl 4A · RWD MPG 14 / 20Range 308 / 440 mi | 4.2L 6cyl 4A | RWD | 22.0 gal83 L | 14 / 20 | 308 / 440 mi | |
| SLE 4dr SUV 4WD 4.2L 6cyl 4A · 4WD MPG 14 / 20Range 308 / 440 mi | 4.2L 6cyl 4A | 4WD | 22.0 gal83 L | 14 / 20 | 308 / 440 mi | |
| SLT 4dr SUV 4.2L 6cyl 4A · RWD MPG 14 / 20Range 308 / 440 mi | 4.2L 6cyl 4A | RWD | 22.0 gal83 L | 14 / 20 | 308 / 440 mi | |
| SLT 4dr SUV 4WD 4.2L 6cyl 4A · 4WD MPG 14 / 20Range 308 / 440 mi | 4.2L 6cyl 4A | 4WD | 22.0 gal83 L | 14 / 20 | 308 / 440 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.
How far a 2008 GMC Envoy 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 16 MPG, a full 22.0-gallon tank covers about 352 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 22.0 | 440 | 308 |
| 3/4 | 16.5 | 330 | 231 |
| 1/2 | 11.0 | 220 | 154 |
| 1/4 | 5.5 | 110 | 77 |
| 1/8 | 2.8 | 55 | 39 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 938 gallons, roughly 43 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.
- EPA combined
- 16–17 MPG
- Tailpipe CO2
- 523–555 g/mi
- Source
- EPA ratings
What it costs to fill up a 2008 GMC Envoy
$93.94 to fill the 22.0-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 22.0 gal | Regular | $4.27 | $93.94 | $70.45 |
By region, 22.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $88.44 |
| Midwest | $4.27 | $93.94 |
| Gulf CoastLowest | $3.70 | $81.40 |
| Rocky Mountain | $4.46 | $98.12 |
| West Coast | $5.42 | $119.24 |
| CaliforniaHighest | $5.89 | $129.58 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 22.0-gallon tank$93.94
- A year of driving (15,000 mi)$4,003
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Envoy tank size in other years
The 2008 Envoy uses the same 22.0 gal tank as every Envoy since 2003.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2009 Envoy | 22.0 gal | 462 mi |
| 2008 Envoy | 22.0 gal | 440 mi |
| 2007 Envoy | 22.0 gal | 440 mi |
| 2006 Envoy | 22.0 gal | 440 mi |
| 2005 Envoy | 22.0 gal | 440 mi |
| 2004 Envoy | 22.0 gal | 418 mi |
| 2003 Envoy | 22.0 gal | 440 mi |
2008 GMC Envoy vs similar 2008 SUVs
The Envoy has the largest tank of the seven 2008 SUVs compared here, 22.0 gallons against 22.0 for the Chevrolet Trailblazer.
| 2008 model | Tank | Longest highway range |
|---|---|---|
| GMC Envoy | 22.0 gal | 440 mi |
| Chevrolet Trailblazer | 22.0 gal | 440 mi |
| Isuzu Ascender | 21.7 gal | 434 mi |
| Jeep Grand Cherokee | 21.1 gal | 422 mi |
| Hyundai Veracruz | 20.6 gal | 474 mi |
| Honda Pilot | 20.4 gal | 449 mi |
| Toyota Highlander Hybrid | 17.2 gal | 430 mi |
Other 2008 SUVs of a similar size, one model per brand.
2008 GMC Envoy fuel pump and gauge parts
These are the part numbers the makers list for the 2008 GMC Envoy. Check the fuel system recalls first: recall repairs are free.
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Frequently asked questions
What is the fuel tank capacity of the 2008 GMC Envoy?
The 2008 GMC Envoy holds 22.0 gallons (83 liters) on every trim we list.
How many gallons and liters does the 2008 GMC Envoy gas tank hold?
The 2008 GMC Envoy tank holds 83 liters, or 22.0 gallons in US gallons.
Does 4WD change the 2008 GMC Envoy gas tank?
No. RWD and 4WD versions of the 2008 GMC Envoy use the same 22.0 gal tank.
How far can a 2008 GMC Envoy go on a full tank?
About 418–440 miles on the highway and 286–308 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 2008 GMC Envoy go on a quarter tank?
About 110 highway miles or 77 in town from the 22.0-gallon tank, which has roughly 5.5 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2008 GMC Envoy take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2008 GMC Envoy?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 22.0-gallon tank from empty costs $93.94. It ranges from $81.40 in the Gulf Coast to $129.58 in California.
How much does a full tank of gas weigh in a 2008 GMC Envoy?
About 136 pounds for the 22.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2008 GMC Envoy have a bigger gas tank than the Chevrolet Trailblazer?
No, they match: both top out at 22.0 gallons in 2008.
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).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.