I'm Lucy, and I'd be happy to answer your questions today. I'm sorry to hear that you've had so many problems with all three of these vehicles.
First, lemon laws only apply to vehicles purchased new. RCW 19.118.031. So you unfortunately would never be able to get a full refund from the manufacturer for the 2003 Monte Carlo that you purchased in 2008, because the lemon law doesn't apply to that vehicle. And the original manufacturer's warranty would have already expired before you bought the car, so they're not responsible for anything that went wrong after the fact. It's unfortunately up to the consumer to check recall information and have a mechanic check out a used vehicle before buying it, so there's no recourse with that one.
The Lemon Law also unfortunately has very strict time periods that must be observed. A consumer only has a right to return the vehicle if substantial defects arise during the "eligibility period," which is defined as 2 years after the vehicle is delivered to the first purchaser. RCW 19.118.021.
You should also be aware that the Lemon law specifically states when a manufacturer repurchases a bad vehicle under that statute, the consumer gets a full refund minus "a reasonable offset for use." RCW 19.118.041. With cars that you've been driving 8, 9, and 10 years, that would be a very large offset. So, even if you still had a legal right to return the cars and demand repurchase now, the price you would get is significantly less than what you paid for the cars - if you'd get anything at all. Daily use is typically calculated at $15/day. Over the course of 8 years, that would mean they could deduct more than $40,000 for use - and that amount would be even higher for the other two vehicles. So, I'm sorry to say, there is really no chance of getting a full refund, for all of those reasons.
I apologize that this was probably not the Answer you were hoping to receive. However, it would be unfair to you and unprofessional of me were I to provide you with anything less than truthful and honest information. I hope you understand. Please rate my answer positively to ensure I am paid for the time I spent answering your question. If you are on a mobile device, you may need to scroll to the right. Thank you.