Hello everyone,I am looking to get a GPS that I can program for trailer Weight, Height, Length etc.I was thinking about getting the "Garmin RV 770 NA LMT-S RV". But would like to hear your thoughts.Specifically about this one or similar units you have used.What did you like about it(them) or dislike? Why?Thanks for the inputRyan

I have the previous model, the RV 76o ... it works OK, but it is not infallible. I'm obsessive compulsive and thoroughly research all the roads around a destination and along a route, looking for surprises, so I don't get surprised by an error in the GPS.The units are only as good as the data they're programmed with, and Garmin doesn't bother to double check any of the data the buy from where-ever. So if some community or map maker decides to mislabel the specs on a road, bridge, underpass, etc, Garmin will blindly accept that error and pass it along to you.On the plus side, the voice command works great. The screen is huge and has a very wide brightness range, so you can see it in noon day sun, and it's not blinding you at night.the tl;dr it's a great gps but don't follow it (or any device including the omnipotent Google) blindly.

we have the garmin RV750. yes you can program for vehicle length weight height etc. However it has one noticeable drawback. you can only program for overall length, not TV and trailer length. So....... it will tell you to avoid roads when it sees your overall length greater than the allowed trailer length for comercial trailers. It doesn't distinguish. And many times roads have a length limit for comercial trailers as well as overall length. Next, many states list height restrictions for the corners of tunnels. and again, it can give you bad info, based on bad input. Not garmins fault but the sources fault. Likely any GPS will give the same problem if you can set overall height.I've run into this issue on roads I KNEW I could travel on, been their, done that. Overall, I like ours, it's nice to have the shortcuts for rv related things like campgrounds, repair etc.and we have the matching rear camera, works great on the back of the trailer.IMHO if your looking for a GPS, and you tow, no reason not to go with the garmin or similar RV GPS for the extra features they offer.

I do not trust any 1 GPS, but I was hoping that the Garmin 770 RV would at least maybe give me a little more warning if I am approaching a "low bridge".Another question I have is:When using the Garmin 770 RV, if you just have the unit on, and do NOT have a destination programmed, but have your RV height set, will the GPS notify you of a low bridge? Or does it have to be programmed for a specific route before it will identify low bridges?If that makes sense.Ryan

We have the Garmin RV770 and in over a 5K of travels this year, it didn't mislead us. Found it to be pretty accurate and useful. But we still had our paper maps.

RV GPS | Good Sam Community

Ryanjb01
Explorer
Dec 01, 2018
azdryheat wrote:
I don't leave much for a machine to do for me. While I do use GPS, I back it up with a scan of the trucker's map.

What is the "truckers map"?
2oldman
Explorer II
Dec 01, 2018
Amazon has a lot of questions answered about this unit.
PenMan
Explorer
Dec 01, 2018
I have the Garmin RV760LMT with up to date maps. All I have to do is turn it on and it will get me lost. I never really trust it now. I use a trucker's atlas to plan my route and use the GPS to look ahead for diesel, food, etc. My phone has a better map program. The last time I was on I40 going through Oklahoma City it kept telling me I had to exit as there was a low clearance ahead (I'm under 12 feet high). I noticed the 18 wheelers were not exiting so I decided to take a chance but the Garmin kept telling me to exit. It even got to a point where it had a screen pop up that made me hit a button to confirm that I was ignoring the Garmin directions. Made it all the way to New Mexico and never saw a low bridge. It has done similar mis-directions many times but this was the craziest. I still use it when on the interstates to look for services at upcoming exits. My guess is if you program it to go to Alaska you'll probably find yourself heading south into Florida as it takes you around the world to Alaska. When I want to get lost I program the Garmin to head to Dallas, Texas so I can find all the dirt roads on the way. I never trust it any more but use the trucker's atlas and it has never been wrong. The Garmin was wrong many, many times. Can you tell I really don’t trust the Garmin?
archbarb
Explorer
Dec 01, 2018
Bought the 770LMT-S while on the road a few months ago. Had it over nighted to the campground we were at in Lubec Maine. Up and using in no time. Very user friendly. Don't know how I have gone with out it now that I use it.
2oldman
Explorer II
Dec 01, 2018
No, there's no bridge there. Mine does this all the time..including getting me off a freeway too early so I have to drive through busy surface streets. It's a real joy in town.
Ryanjb01
Explorer
Dec 01, 2018
2oldman wrote:
No, there's no bridge there. Mine does this all the time..including getting me off a freeway too early so I have to drive through busy surface streets. It's a real joy in town.

I'm curious if you have a setting selected improperly. Maybe that is why it is doing what it is.
2oldman
Explorer II
Dec 01, 2018
Ryanjb01 wrote:
I'm curious if you have a setting selected improperly. Maybe that is why it is doing what it is.
I'll check to see if it's set to 'boat.'
GordonThree
Explorer
Dec 01, 2018
2oldman wrote:
No, there's no bridge there. Mine does this all the time..including getting me off a freeway too early so I have to drive through busy surface streets. It's a real joy in town.

In Thunder Bay ON, both my Garmin and the all mighty Google tried to route me over a railroad bridge. I imagine someone at the city or county level must have a good laugh telling the map data companies that the rail bridge is open for automotive traffic. Even shows as a road online, but it's certainly not.

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