I use a Garmin RV Series model that allows you to input all the information on your vehicles. Height, Weight, Length, etc... It's been beneficial in several situations with low bridges and weight restricted roads in the spring. I like the separate unit from my truck display but that's just personal preference. I've also used RV Trip Wizard and use that to plan my trips generally.
2018 North Point 377RLBH, Roadmaster Comfort Ride, Dexter E-Z Flex Suspension, Flexair 21k Pinbox
2017 Ford F350 Lariat CC DRW LB 6.7, Air Lift 7500XL with Air Lift dual channel wireless