[JLHarper]

Here is a chart copied from another site that may help.

$21,000 is to high, imo Keep looking and check CraigsList daily now that college is going back. Or, run your own ads WANTED.

Some deals out there. Mid to upper $ Teens for 05 and 06s

COPIED:

04-06 GTO Differences

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2004 GTO LS1 348ci 5.7L V8 350Hp@ 5200RPM/ 365 lb-ft Torque @ 4000RPM
- Flat hood
- Dual Exhaust(about 2 1/4" in some places it necked down to 2")
- 17" Rims only
- Tremec T56 M12 6 speed manual/ Hydramatic 4L60-E 4-speed automatic
- No dead pedal

2005 GTO LS2 364ci 6.0L V8 400Hp @ 5200RPM/ 400 lb-ft Torque @ 4000 RPM
- Exhaust manifolds were trimmed down from 4mm to 3mm to increase flow and make them lighter
- "Ram Air" hood
- Split dual exhaust 2 1/2" w/modified rear bumper cover with "GTO"
- Different gauge font
- 17" Rims standard 18" optional
- Improved drivetrain(driveshaft,differental, and CV's)
- Brakes(increased in size from 11.6" to 12.6" front) Rear brakes got vented disk a change from 04 solid rear disk. All calpers painted red, front calipers had GTO and PBR script.
- Flat hood was an option
- Tremec T56 M12 6 speed Manual/Upgraded to the Hydramatic 4L65-E 4-speed Auto
- Dead padal added
- Rear deck lid read "Pontiac" not present on the 04 model

2006 GTO Same as 2005 GTO w/some improvements listed below:
- Blacked out tail lamps
- Lighted Steering wheel contols
- Door lock button in center console
- Optional smokers package w/two 12V power outlets
- "Faster" power seats
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LS2 Engine:LS2 Small-Block Engine