2006 1LT purchased new, I'll try to get these in order....

Started with aftermarket fog, later switched to stock fogs (still aftermarket wiring)
Stainless exhaust tip.
Modified rear wiper to stay off glass for cleaning.
Steering wheel radio controls.
20% tint all around.
Hidden Hitch w/ Chevrolet cover.
Lower billet grill.
Window visors.
HHR logo splash guards
Removed stock fog light switch dummy panel, have remote head for Passport 8500 x50 there.
K&N drop in filter.
Silver carbon fiber bumper cover.
IPCW LED tails (Ruby)
18" polished 06 Cobalt SS/SC wheels
Recon 48" running board lights (dual element for signals also).
Turbo Tech sway bar (red).
NAPA rotors & pads.
Chrome roof rails.
All exterior lights switched to LED (minus 3rd brake light).

Things I have, but haven't done yet.
Flush door lock knobs (actually bought in 06, still in map pocket..lol)
Billet bumper cover (was raw billet and still haven't finished the final polishing)
LED headlight accent lights.

I think that covers it. Don't really classify most of this as "mods" though.

Let´s see:

- Side orange & clear gray customized painted stripes.
- Side chrome "V" (3 per side) emblems.
- White light bulbs on headunits and fog lamps.
- Door sills with "HHR" logo (purchased on the dealer)
- Rear fender plastic top cover.
- Rear Mud splasher with bowtie.
- A bunch of decals on the back (Harley davidson, texas flag, I love NY, NYFD, a bull).
- Black wheel lugs.
- Front windows tinted.
- Springs on the seat head rest rods.
- Chevy Steering wheel cover.
- Pioneer 3100DVD head unit.

I have this too, are not installed, but are waiting to be:
- Front 6 1/2 Sony 260W component (I don´t remember the model).
- Rear 6 1/2 Pioneer 220W speakers.
- Sony 2 channel 600W amplifier.
- Device to allow control the unit with the steering wheel control.

I think is all.

Well, mine is a 2008 2LT, bought it with just under 19,000 miles on it a year and a half ago, and now have 47,100 on it as of last night,lol.

Mods done so far:
Goldline Gen 2's front/back
tinted 20% all the way around(except for windshield,lol)
Infinity Reference 6 1/2" components up front, 6 1/2" 3-ways in back doors
spliced in to factory amp wiring to hook up my 500 watt mono amp with 2-12's
Stainless Steel upper and lower mesh grill
billet aluminum shorty antenna
Chrome antenna base cover
IPCW Clear LED tail lights
18" polished Pontiac Solstice wheels
K&N Drop in replacement air filter
Green Neon Underbody Lights
painted brake calipers and drums Lime Green
painted Bowties (Lime Green)
Lime Green vinyl bowtie overlays on center caps on wheels
painted waterfall, window switch control panel, steering wheel controls, console(around shifter), and the strips on door panels Lime Green
added chrome HHR letters to the big space on the right side of shifter
De-Badged
Thats it so far, have thought about upgrading stereo but dont want to have to spend a boat load of money on the wiring harness crap,lol.

2009 1LT Charcoal/Ebony

COMPLETED MODS:

01) Painted Rear Bowtie
02) Painted Front Bowtie
03) 3-Bar Grill
04) Speed Mesh Grill Inserts
05) Shaved Rear Wiper
06) IPCW Bermuda Black LED Taillights
07) GMC Sierra Foglights (to immitate the factory fogs that it did NOT come with)
08) 20% Front Door Tint
09) 5% Over Factory Tint On All Remaining Glass
10) Pioneer AVH-P4200DVD headunit
11) Dual 7" Headrest Monitors
12) Rearview Camera (recessed beside license plate)
13) Kicker CompVR 10" Subs in Custom Box
14) Sony XM-1002HX Amp - Hidden in wall (in factory sub location)
15) Polk Audio 3-way Replacement Rear Door Speakers
16) Polk Audio Component Set Front Door/Windshield Pillar Speakers
17) Stubby Door Lock Stems
18) Tinted Headlights (R-Vinyl)
19) Tinted Markers & Reflectors (Nite Shades)
20) LED Tag Lights
21) DRL fuse removed
22) Dual horns

PENDING MODS:

01) Remote Start
02) Overhead Console (Factory GM)
03) Pioneer GPS Add-On Module
04) Stubby Roof Antenna
05) Solstice Aluminum Wheels (non-polished)
06) Painted Headlight Housings (body color)
07) Switchback (dual color) LED Front Signal Bulbs

__________________
K&N intake Magnaflow exhaust dejon boost pipe push button start pioneer 4100dvd Memphis mc200/4 Memphis 1500/1 4 pr 15s4 Memphis
mc6.5 rear Memphis sync 6.5 front 20" black ice rims hp tune weisco pistons arp head studs performance autowerks intercooler pte 55/57 turbo werks downpipe

Where did you find a push button start @ for the HHR?

Reckon he is talking about remote start? That's push-button.

Performance:
GMS1
CIA catless dp
dejon hot side cp
k&n drop-in filter
custom Dubbie tune

Suspension/Drivetrain:
Pedders springs
PRS 1" rear sway bar
PRS control arm bushings
PRS stage 2 rotated tranny mounts
TWM shifter

Other:
Aeroforce Interceptor gauge

Plans over the winter: debadge, tinted windows, black bowties, LED bulbs where needed, tinted tail lights & side markers, headlights (either Fall Editions or black eBay ones)

No I ment push button I got it from Toyota