Fastest and most effective way to sell a car?

-I MUST sell a car in less than a week but I also don't want to loose a lot of money by doing so.

I will try Craigslist (it takes too long) and putting an a sign on the truck and park it on a street with a lot of traffic.

Any other suggestions or ideas?

THANK YOU

I live in CA by the wayThe fastest way to sell your car is to take to a used car dealer. They probably won't give you as much as if you sell it your self but if you get down to the last day you could run it down to a dealer and sell it in about an hour. Some used car dealers will give you a price and let you wait up to a week to actually sell it. You could check out several dealers and see who gives you the best price.
If the car fax is showing all good info then post it on a side window.

Has it been detailed . U can do that, make it look like new. Check the craigslist, & auto trader for price of other similar cars. So u can see if your price is competitive & maybe a bit lower. U can do a search on computer for "For Sale Ads" that way u can advertise with more ads. Make sure a picture is in all of them. Even Walmart has classified ads in your area. So we have Auto Trader, Walmart, Oodle, backpage, & look for more. Advertise as low as u can go because of time frame. If u R competitivly priced then people have to look around. If u R a great deal to begin with then u will have people calling right away. There would be no point in putting u must sell this week. That will only make people u don't want coming. Make sure u deal with cash only & have your title ready to go. When u sell get driver's lic. information.
Take it to a dealer provided they can make a profit maybe they'll give you what you owe on but that means you wont make a dime but at least it'll get you out of the car. in order to sell it on your own that fast your going to have to undersell it, your going to have to make the potential buyer an offer he cant refuse.
craigslist.org is a great way...there's tons of people that search craigslist daily. Also http://buyaprojectcar is taking cars for free listings.