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I show Part Number 25037333
I never asked that you pay anything........I posted the Part Number I show for 1992 7.4 Gauge, not Light......Are you sure this is Factory Gauge & not Aftermarket?
There is a Universal "single wire" Temperature Sending Unit likehttps://www.summitracing.com/parts/smp-ts6/overview/make/chevrolet
which I believe you have
I am very familiar with Motor Home Chassis & building.......If you do not understand my answer or believe your Motor Home in "1992" would come with a NON GM Part, then sorry, you are in for a reality check