My factory warranty runs out next month. What items should I check over to see if I should bring it up to the dealer prior to warranty running out?

So far the following has been done (at 46,000km on my '08GXP)

Front rotors turned, new ceramic pads
K&N drop-in
New Cabin Air
4 wheel alignment/balance
Mobil 1 synthetic + K&N oil filter
9000k HID install

Dealer/warranty items done:
Center dash speaker replaced (not connected to new aftermarket stereo anyways now)
New Heater blower motor (was noisy)
New tilt assembly / tilt bowl / tilt stop (tilt stop piece fell out 3 times after dealer repaired, finally replaced all components)
New passenger fender + head light enclosure + bumper paint/repair (backed into 2 yrs ago)
Return power steering line (leaked)

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2008 Grand Prix GXP Dark Metallic Grey

take it in for the semi- annual inspection

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2007 Pontiac Grand Prix
CAI, HV3, ER Rockers, PLOG, Overkill Tune
http://www.cardomain.com/ride/2990036