I've got one of these
http://www.amazon.com/gp/product/B008ZDY..._10&sr=8-10

It cheap and works well. Also has a cool feature of the most common fixes for the codes it finds. It is updatable w a PC and internet.


Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451