APA.ca (Lemon-Aid New Car Guides)
The Automobile Protection Association's site includes free online versions of the 2008 and 2007 Lemon-Aid New Car Guides.

Auto123.com
Canadian site offers loads of information, reviews of new and used cars and maintenance tips.  You can locate used cars by province and specifications.

Autoweb.com
Contains both US and Canadian information on buying new and used vehicles. Also includes price estimates and tips for selling cars. Other useful features include insurance quote and loan calculators.

CanadianDriver
Provides Canadian information, including new and used vehicle reviews, recalls, test drives, and classified ads. Subscribe for free to receive information from Ask an Expert!

Edmunds.com
Contains very useful information for anyone intending to buy new or used vehicles. Includes specs for models from 1990 onward, as well as Buyers' Advice, Road Test News and Editorials. Also includes articles updated daily.

Fuel consumption ratings
Check out car and truck fuel consumption ratings for the last decade.

List of Vehicles Admissible from the US
Transport Canada's vehicle importation requirements.

National Highway Traffic Safety Administration