rollingrver@yahoo.com

Hi Read your initial post and did some research. Turns out Colorado testing stations will not validate whether you must have a test or not - they just test and collect the revenue. Further investigation revealed that Diesel vehicles are not subject to standardized emission testing in Colorado. They must have a "opacity test" - they put a monitor on your exhaust pipe and test. If your RV is like mine, the diesel exhaust is virtually transparent. I didn't dig deep enough to find out the fee for this type of testing, but have to believe it is less expensive than a full blown emission test. Here in Nevada, we get a waiver for Diesel RV's so never have to face the testing routine. You might want to check into this whole thing deeper. Good Luck John