See also:

Hitch ball
Choose a hitch ball of the proper size and weight rating for your trailer. ● The required hitch ball size is stamped on most trailer couplers. Most hitch balls also have the size printed ...

Clearing the programmed information
Individual buttons cannot be cleared. However, to clear all programming, press and hold the two outside buttons and release when the indicator light begins to flash (approximately 20 seconds). ...

Engine serial number
The number is stamped on the engine as shown. ...