We have the tomtom 6000 truck specific nav,company fitted and linked to the tracker and forward camera. It’s handy because a lot of our deliveries don’t have a post code (site work) and the tm can find the site on google maps and send it to the sat nav, then when it goes wrong it’s not your fault. Even this nav still gives dodgy routes on occasion and I still tend to check out a strange address on a map cos we all know how much fun it is reversing a mile down a single track lane 
I’ve been using Copilot for trucks app. Ended up buying it. Used it on the PDA at PH and I rarely had any issues with it.
Would help me if they had what roads where closed on them mind haha.