I am not really sure who makes it, can look up online. It is sold at camping world and other places including online. I bought mine at cw, usually around $150. Simply plugs into the diagnostic plug under the dash up front. Reads the info from the engine computer. Never had too (knock on wood) from mine but it will read trouble codes from computer also if you are having a fault or check engine light. Company claims fuel monitoring and mileage but I haven't used that function, I bought to monitor engine parameters that the dash gauges lack clarity. Hope this helps.
Chad
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