2006 GMC TopKick Fuel Tank Size
2006 GMC TopKick fuel tank size: 25 gal (C4/C5 models, standard tank) or 32 gal (C4/C5 models, optional tank). From the owner's manual, PDF page 316.
Depends on your version. Choose yours, or compare them here.
- C4/C5 models, standard tank 25 gal
- C4/C5 models, optional tank 32 gal
25gal
C4/C5 models, standard tank
32gal
C4/C5 models, optional tank
2006 GMC TopKick Owner's Manual, PDF page 316
25 galOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Fuel tank size · C4/C5 models, standard tank · PDF page 316
25 gal
Fuel tank size · C4/C5 models, optional tank · PDF page 316
32 gal
2006 GMC TopKick Owner's Manual, PDF page 316
25 galOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Fuel tank size · C4/C5 models, standard tank · PDF page 316
25 gal
2006 GMC TopKick Owner's Manual, PDF page 316
32 galOpen the manual at this page ↗Added Oct 21, 2026 · Updated
See where it's printed
Fuel tank size · C4/C5 models, optional tank · PDF page 316
32 gal
See every quote (2 values)
All versions
| Applies to | Value | Manual says | Page |
|---|---|---|---|
| C4/C5 models, standard tank | 25 gal | “25 gal” | PDF page 316 ↗ |
| C4/C5 models, optional tank | 32 gal | “32 gal” | PDF page 316 ↗ |
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