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Engine | Fuel Type | Transmission | Miles Per Gallon | City | Hwy |
| CTS |
| 6 cyl., 2.8 L | Regular | Manual(M6) | 17 | 27 |
| 6 cyl., 2.8 L | Regular | Auto(S5) | 18 | 27 |
| 6 cyl., 3.6 L | Regular | Manual(M6) | 17 | 26 |
| 6 cyl., 3.6 L | Regular | Auto(S5) | 18 | 27 |
| 8 cyl., 6 L | Premium | Manual(M6) | 15 | 24 |
| DTS |
| 8 cyl., 4.6 L | Regular | Auto(L4) | 17 | 25 |
| 8 cyl., 4.6 L | Regular | Auto(L4) | 17 | 24 |
| ESCALADE 2WD |
| 8 cyl., 6.2 L | Premium | Auto(L6) | 13 | 20 |
| ESCALADE AWD |
| 8 cyl., 6.2 L | Premium | Auto(L6) | 13 | 19 |
| FUNERAL COACH/HEARSE |
| 8 cyl., 4.6 L | Regular | Auto(L4) | 14 | 20 |
| LIMOUSINE |
| 8 cyl., 4.6 L | Regular | Auto(L4) | 15 | 20 |
| SRX 2WD |
| 6 cyl., 3.6 L | Regular | Auto(S5) | 16 | 24 |
| 8 cyl., 4.6 L | Premium | Auto(S6) | 15 | 22 |
| SRX AWD |
| 6 cyl., 3.6 L | Regular | Auto(S5) | 16 | 23 |
| 8 cyl., 4.6 L | Premium | Auto(S6) | 15 | 22 |
| STS |
| 6 cyl., 3.6 L | Regular | Auto(S5) | 18 | 27 |
| 8 cyl., 4.4 L | Premium | Auto(S6) | 14 | 21 |
| 8 cyl., 4.6 L | Premium | Auto(S6) | 17 | 27 |
| STS AWD |
| 6 cyl., 3.6 L | Regular | Auto(S5) | 17 | 25 |
| 8 cyl., 4.6 L | Premium | Auto(S6) | 15 | 23 |
| XLR |
| 8 cyl., 4.4 L | Premium | Auto(S6) | 15 | 22 |
| 8 cyl., 4.6 L | Premium | Auto(S6) | 17 | 27 |
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