The OP has asked what the NUMBERS in the model numbers mean, NOT the letters after the model numbers.
I don't know how they came up with 3700/3701LK ,as I don't know what the 37 stands for(as ours is close to 43'overall) but I know the "00" is an rv fridge model and the "01" is residential fridge model.
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Darwin & Carla
2018.5 3701LK Montana
2022 3500HD Denali Duramax SRW
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