Is my girlfriend ignoring my advice a communication issue or disrespect?

In a long term relationship 6 years. I'm finding that my girlfriend will do anything in her power to go against my advice or suggestions. We have talked about it several times and still we find ourselves in situations that could have been avoided if she just took my "advice". I quote advice as these suggestions aren't merely my opinions or how I would go about it. E. G. I found her car to have no coolant, I told her coolant doesn't just disappear and that without it your car will overheat and you will damage engine. The message I relayed was please take your car to the shop, you have a coolant leak that if not address will damage your car. One week later I get a call that her car has overheated and she's stuck on the side of the road. This is extremely frustrated because I believe this could have been avoided if she just took my advice. I have been through numerous similar occasions like this with her. I say red she says blue. I say wet, she says dry, etc. It's become a pattern of what I think is just her rebelling and doing everything in her power just to go against what I think. I'm not perfect nor am I always right but the lack of acknowledging my concerns/opinions is really driving a wedge between us. I find myself constantly cleaning up messes that could have been avoided. I don't want to control my girlfriend I want to be heard. I get no satisfaction in saying I told you so, I rather avoid the negative outcomes all together. I feel there is a underlying issue here. We talked about several times and nothing has changed. I'm ready to cut our losses as I see it as a lack of respect wether she knows it or not

Is my girlfriend ignoring my advice a communication issue or disrespect?
Post Opinion