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| Submodel | Resale Range | Trade-in Range |
| 2009 Sierra 1500 4WD 4-Dr Crew Cab Short V8 | $21,620 - $33,570 | $17,910 - $29,290 |
| 2009 Sierra 1500 4WD 2-Dr Reg Cab Std V8 | $18,100 - $22,300 | $14,900 - $19,100 |
| 2009 Sierra 2500 HD 4WD 4-Dr Ext Cab Std V8 | $23,040 - $34,090 | $19,330 - $30,090 |
| 2009 Sierra 2500 HD 2WD 2-Dr Reg Cab V8 | $15,170 - $21,300 | $12,750 - $18,590 |
| 2009 Sierra 3500 HD 4WD 4-Dr Ext Cab V8 | $23,550 - $35,760 | $19,810 - $31,340 |
| 2009 Sierra 1500 2WD 2-Dr Reg Cab Long V6 | $10,670 - $13,290 | $9,150 - $11,770 |
| 2009 Sierra 2500 HD 4WD 4-Dr Ext Cab Long V8 | $22,700 - $33,780 | $19,090 - $29,880 |
| 2009 Sierra 1500 2WD 4-Dr Crew Cab Short V8 | $18,360 - $29,500 | $15,240 - $25,800 |
| 2009 Sierra 1500 4WD 4-Dr Ext Cab Std V8 | $18,250 - $28,710 | $15,140 - $24,830 |
| 2009 Sierra 1500 2WD 2-Dr Reg Cab Long V8 | $13,980 - $17,650 | $11,540 - $15,210 |
| 2009 Sierra 1500 2WD 2-Dr Reg Cab Std V6 | $11,830 - $14,980 | $9,750 - $12,900 |
| 2009 Sierra 3500 HD 4WD 4-Dr Crew Cab V8 | $26,460 - $39,300 | $22,360 - $35,010 |
| 2009 Sierra 1500 2WD 2-Dr Reg Cab Std V8 | $14,690 - $18,360 | $12,100 - $15,760 |
| 2009 Sierra 3500 HD 2WD 2-Dr Reg Cab V8 | $15,640 - $21,740 | $13,180 - $18,990 |
| 2009 Sierra 1500 4WD 2-Dr Reg Cab Long V8 | $17,390 - $21,590 | $14,330 - $18,530 |
| 2009 Sierra 1500 4WD 2-Dr Reg Cab Long V6 | $14,630 - $18,300 | $12,090 - $15,760 |
| 2009 Sierra 1500 2WD 4-Dr Ext Cab Std V8 | $17,190 - $24,620 | $14,240 - $21,310 |
| 2009 Sierra 1500 Hybrid 2WD 4-Dr Crew Cab V8 | $23,310 - $29,150 | $19,630 - $25,470 |
| 2009 Sierra 1500 4WD 2-Dr Reg Cab Std V6 | $15,280 - $18,940 | $12,580 - $16,240 |
| 2009 Sierra 2500 HD 4WD 2-Dr Reg Cab V8 | $18,420 - $25,440 | $15,390 - $22,120 |
| 2009 Sierra 2500 HD 2WD 4-Dr Crew Cab Std V8 | $22,460 - $33,350 | $19,020 - $29,970 |
| 2009 Sierra 2500 HD 2WD 4-Dr Ext Cab Std V8 | $19,780 - $30,010 | $16,660 - $26,610 |
| 2009 Sierra 3500 HD 2WD 4-Dr Crew Cab V8 | $23,200 - $35,230 | $19,680 - $31,520 |
| 2009 Sierra 2500 HD 2WD 4-Dr Ext Cab Long V8 | $19,440 - $29,700 | $16,420 - $26,390 |
| 2009 Sierra 2500 HD 2WD 4-Dr Crew Cab Long V8 | $22,110 - $33,520 | $18,860 - $29,240 |
| 2009 Sierra Denali 4WD 4-Dr Crew Cab V8 | $31,180 - $39,350 | $27,460 - $35,640 |
| 2009 Sierra 1500 2WD 4-Dr Ext Cab Short V8 | $18,130 - $26,210 | $15,020 - $22,790 |
| 2009 Sierra 1500 4WD 4-Dr Ext Cab Long V8 | $18,830 - $27,720 | $15,580 - $23,830 |
| 2009 Sierra 3500 HD 4WD 2-Dr Reg Cab V8 | $18,860 - $27,160 | $15,770 - $23,570 |
| 2009 Sierra 2500 HD 4WD 4-Dr Crew Cab Std V8 | $25,720 - $37,420 | $21,700 - $33,450 |
| 2009 Sierra 1500 Hybrid 4WD 4-Dr Crew Cab V8 | $25,530 - $31,900 | $21,420 - $27,800 |
| 2009 Sierra 2500 HD 4WD 4-Dr Crew Cab Long V8 | $25,370 - $37,540 | $21,530 - $32,690 |
| 2009 Sierra 1500 4WD 4-Dr Ext Cab Short V8 | $19,060 - $30,260 | $15,750 - $26,260 |
| 2009 Sierra 1500 2WD 4-Dr Ext Cab Long V8 | $15,930 - $23,660 | $13,160 - $20,350 |
| 2009 Sierra 3500 HD 2WD 4-Dr Ext Cab V8 | $20,290 - $31,700 | $17,130 - $27,870 |
| 2009 Sierra 1500 2WD 4-Dr Ext Cab Short V6 | $15,270 - $18,930 | $12,690 - $16,350 |
| 2009 Sierra Denali 2WD 4-Dr Crew Cab V8 | $29,150 - $36,800 | $25,670 - $33,320 |
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