Hi Blair
Last year I was in a similar position to you with not having much information on a family member who served in the US Army. I was lucky as he died in the war so a bit more information was available on him. However once I learnt that many of the service records were lost in a fire at the archives in 1973 I decided to use a researcher. I had read how long it takes to get much back from the archives whereas the researcher is on the ground there. He pulled off records for 2 other family members as well. I didn't even have a service number for one of them. I can really recommend his services. Even with the basic details you may receive, it will allow you to do some further research elsewhere if desired. On one of my men I got very little but was able to find diaries etc on the internet once I had the basic details of his service . If you are really keen Geoff the researcher will copy the units day reports but that can be quite an expensive exercise. I did it on one of me guys and it was an eye opener. If interested the website is
https://goldenarrowresearch.com . Another website which I believe is also linked with Geoff is
www.mymilitaryservicerecords.com There is loads of information on both. I am based in the UK and payment is easy.
I don't know if you are on Ancestry but I notice against his name an entry in the New York Passenger lists 1820 - 1957 for 1946 on the Lejeune.The list is US servicemen leaving France and arriving NY on 3 April 1946. I did notice his ASN is very slightly different to his SSN. Maybe just coincidence and not him but I notice his release date was 8 April 1946. (For anyone else reading this I picked these details up from the US Dept of Veteran affairs BIRLS Death files on Ancestry)
Regards
KK