Funny enough, I was also recently changing the fuel filter on my Chevrolet Silverado HD and dropped the ratchet inside the engine compartment. So I had to get a neodymium magnet and get it out. It was pretty long and difficult. But I got through it.💪
Might be relevant to someone - I came across an informative article on the internet about the best fuel filter for Duramax Diesel. In it you can find information on how to replace the filter yourself and find the right one for your car. Just with it, I replaced the fuel filter on my car quickly and easily. More info here - https://southwestexpresslube.com/fuel-filter-for-duramax-diesel/