The one our Sierra had in it simply said made in china.
The switchover indicator broke off in the cold weather. So I ended up upgrading to a made in mexico Marshall regulator lol. Had to make a new mounting bracket for it too, but it was worth it. Cost was about 60 bucks for the regulator.
1999 Ford Superduty F250 PSD CC SB 6spd 4x4.
B&W goosneck/companion hitch, Airlift 5000 airbags.
2006 Sierra F28 Rear Kitchen 5th Wheel, 31' = 10k pounds.
Nights camped in 09-14, 2010-23