2008 GMC Sierra 2500HD Gas Tank Size & Fuel Capacity
Fuel tank capacity
26.0–34.0gal · 98–129 L
The 2008 GMC Sierra 2500HD has a fuel tank capacity of 26.0 to 34.0 gallons (98–129 liters), depending on the trim. The most common size is 34.0 gallons, used on 20 trims.
34.0 gal · Bigger than 95% of 2008 models we list.
Listed separately: 2008 GMC Sierra 1500 (26.0–34.0 gal), 2008 GMC Sierra 3500HD (34.0 gal).
- By trim
- Gas cap & parts
- Fuel essentials
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
2008 GMC Sierra 2500HD fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
- Cab
- Bed
All 36 trims
| Trim | Engine | Drive | Tank | |||
|---|---|---|---|---|---|---|
| SLE1 4dr Crew Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLE1 4dr Crew Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLE1 4dr Extended Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLE1 4dr Extended Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLE2 4dr Crew Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLE2 4dr Crew Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLE2 4dr Extended Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLE2 4dr Extended Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLT 4dr Crew Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLT 4dr Crew Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLT 4dr Extended Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| SLT 4dr Extended Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| Work Truck 4dr Crew Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| Work Truck 4dr Crew Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| Work Truck 4dr Extended Cab 4WD SB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 26.0 gal98 L | |||
| Work Truck 4dr Extended Cab SB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 26.0 gal98 L | |||
| SLE1 2dr Regular Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLE1 2dr Regular Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLE1 4dr Crew Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLE1 4dr Crew Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLE1 4dr Extended Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLE1 4dr Extended Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLE2 4dr Crew Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLE2 4dr Crew Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLE2 4dr Extended Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLE2 4dr Extended Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLT 4dr Crew Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLT 4dr Crew Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| SLT 4dr Extended Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| SLT 4dr Extended Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| Work Truck 2dr Regular Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| Work Truck 2dr Regular Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| Work Truck 4dr Crew Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| Work Truck 4dr Crew Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| Work Truck 4dr Extended Cab 4WD LB 6.0L 8cyl 6A · 4WD | 6.0L 8cyl 6A | 4WD | 34.0 gal129 L | |||
| Work Truck 4dr Extended Cab LB 6.0L 8cyl 6A · RWD | 6.0L 8cyl 6A | RWD | 34.0 gal129 L | |||
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. The EPA doesn't rate fuel economy for heavy-duty pickups and vans (over 8,500 lb gross vehicle weight), so these trims have no official MPG or range.
What it costs to fill up a 2008 GMC Sierra 2500HD
$145.18 to fill the 34.0-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 |
|---|---|---|---|---|
| 26.0 gal | Regular | $4.27 | $111.02 | $83.26 |
| 34.0 gal | Regular | $4.27 | $145.18 | $108.88 |
By region, 34.0-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $136.68 |
| Midwest | $4.27 | $145.18 |
| Gulf CoastLowest | $3.70 | $125.80 |
| Rocky Mountain | $4.46 | $151.64 |
| West Coast | $5.42 | $184.28 |
| CaliforniaHighest | $5.89 | $200.26 |
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
- 26.0-gallon tank$111.02
- 34.0-gallon tank$145.18
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Sierra 2500HD tank size in other years
The 2008 Sierra 2500HD uses the same 26.0–34.0 gal tank sizes as every Sierra 2500HD since 2001.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2013 Sierra 2500HD | 36.0 gal | Not rated |
| 2012 Sierra 2500HD | 36.0 gal | Not rated |
| 2011 Sierra 2500HD | 36.0 gal | Not rated |
| 2010 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2009 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2008 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2007 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2006 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2005 Sierra 2500HD | 26.0–34.0 gal | 408 mi |
| 2004 Sierra 2500HD | 26.0–34.0 gal | Not rated |
| 2003 Sierra 2500HD | 26.0–34.0 gal | Not rated |
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
2008 GMC Sierra 2500HD vs similar 2008 pickups
At 34.0 gallons, the Sierra 2500HD's largest tank ranks third of the five 2008 pickups compared here. The Ford F-250 Super Duty carries the most (38.0 gal) and the Toyota Tundra the least (26.4 gal).
| 2008 model | Tank | Longest highway range |
|---|---|---|
| Ford F-250 Super Duty | 30.0–38.0 gal | Not rated |
| Dodge Ram Pickup 2500 | 34.0–35.0 gal | Not rated |
| GMC Sierra 2500HD | 26.0–34.0 gal | Not rated |
| Chevrolet Silverado 2500HD | 26.0–34.0 gal | Not rated |
| Toyota Tundra | 26.4 gal | 502 mi |
Other 2008 pickups of a similar size, one model per brand.
2008 GMC Sierra 2500HD fuel system recalls
None of the 3 recalls NHTSA lists for the 2008 GMC Sierra 2500HD involve the fuel system.
2008 GMC Sierra 2500HD fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 2008 GMC Sierra 2500HD, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 2008 GMC Sierra 2500HD?
The 2008 GMC Sierra 2500HD holds between 26.0 and 34.0 gallons, depending on the trim. 34.0 gallons is the usual size; the smaller 26.0-gallon tank is on the SLE1 4dr Crew Cab 4WD SB.
How many gallons and liters does the 2008 GMC Sierra 2500HD gas tank hold?
The 2008 GMC Sierra 2500HD tank holds 98–129 liters, or 26.0–34.0 gallons in US gallons.
Which 2008 GMC Sierra 2500HD has the biggest gas tank?
The 34.0-gallon tank is on the SLE1 2dr Regular Cab 4WD LB, SLE1 2dr Regular Cab LB, SLE1 4dr Crew Cab 4WD LB and 17 other trims. The smallest tank, 26.0 gallons, is on the SLE1 4dr Crew Cab 4WD SB.
Does 4WD change the 2008 GMC Sierra 2500HD gas tank?
No. 4WD and RWD versions of the 2008 GMC Sierra 2500HD use the same 26.0–34.0 gal tank.
What gas does the 2008 GMC Sierra 2500HD 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 Sierra 2500HD?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 34.0-gallon tank from empty costs $145.18. It ranges from $125.80 in the Gulf Coast to $200.26 in California.
How much does a full tank of gas weigh in a 2008 GMC Sierra 2500HD?
About 211 pounds for the 34.0-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2008 GMC Sierra 2500HD have a bigger gas tank than the Chevrolet Silverado 2500HD?
No, they match: both top out at 34.0 gallons in 2008.
Has the 2008 GMC Sierra 2500HD had a fuel pump or fuel system recall?
No. None of the 3 recalls NHTSA lists for the 2008 GMC Sierra 2500HD involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings. Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (GMC fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.