Here they come, rapid fire, no filter 
http://www.billesteschevy.com/used-vehicles/#action=im_ajax_call&perform=get_results&page=1&type[]=New&type[]=Used&type[]=Certified+Used&make[]=Chevrolet&show_all_filters=false&_post_id=5
Get more used cars.
318 new to 83 used. Ck your GA. For most all dealers (especially chevy), the 1st clicked button is used cars. Used cars are a doorway to new car sales (especially in todays market)
Get your vendor's leasing module.
Shoppers shop by payment. Leasing payments are crushing it lately. See it in the wild at http://www.mercedesbenzchicago.com/new-vehicles/c-class/ Great door buster tool.
Mobile Shoppers on other dealers lots?
Mobile UI tweak:
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- "Get ePrice" is open to interpretation. Think of action phrases that speaks to someone in market RIGHT NOW. Run a split test.
- Can you see chat transcripts by mobile only? If so, what are the shoppers asking? I'd bet that ask "is it avail" and "will you discount it more?" I'd consider mobile chats to be your single most important opportunity. I'd have mobile chats with special talk tracks and put them on high alert. Do some transcript homework and ask your vendor for ideas.
Speaking of mobile, consider using a unique phone number so you can track it AND listen to them. Like chat, these calls may prove to be your most valuable sales calls.
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The photo resolution looks fuzzy.
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Your interior shots look far better. Probably a poor camera or incorrect setting.
p.s. that phone number is annoying, do ppl call it? (BTW, you have 5 different phone numbers on your website)
This top banner is great. It's classy, and it covers up your open ceiling.
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That lower banner is so strong it hides the car you want to sell. Think of reducing it to smaller icon in the lower right.