When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I Googled 1999 7.3L General Electronics Module and came across part number F81B-14B205-XX (XX is a placeholder).
If you can match the part numbers exactly, then no reprogramming is required. Although, if you believe it is the wrong part number, you will more than likely need to have yours reprogrammed.
You might try to contact DTC and see if they can help. They do not have GEM listed on their site, but might be able to provide you some information.
F81Z14B205EE - WITH OR W/O ESOF, WITH POWER GROUP, WITH KEYLESS F81Z14B205BB - W/O ESOF, WITH POWER, W/O KEYLESS F81Z14B205DE - 4X4 WITH ESOF, NO KEYLESS ENTRY XC3Z14B205FA - NO POWER OPTIONS
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.