All vehicles manufactured 1996 and later are classified as OBDII.
The best OBDII guage I can recommend is the UltraGuage...it will read trouble codes, track your fuel economy, engine temperature, RPMs, speed, distance, battery voltage, etc etc. and is it MUCH cheaper then the ScanGuage.
It is LED backlit, it can be mounted on your dash or windshield, it now can read Metric and English, which the SG cannot and the display is much larger.
You can read UP to 8 guages at once versus only 4 with the SG, plus you can set it to auto change the pages for you to read them all at a glance.
Also, unlike the SG, with the UG, all you do is plug the device into your OBDII port, switch the key to ON/RUN (you do not have to start the engine, as long as the battery is activated) and it will scan your vehicle for all guages that are compatible with UG.....UP to 75 guages are available with UG.
It is a better deal all around and is much cheaper. Only purchase the ScanGuage is you can afford it and if you want to connect several ScanGuages together at once.
I hope this helps!
-LSS