Haven't heard about it specifically but I would think they will have to do that as part of the battery replacement if there is such a thing.

 

I have not heard of this service before. The closest I get to cleaning the underbody is spraying the garden hose down there when washing the car each week.

 

I think the dealer is playing you. The "cover" is the battery outside shell and is part of that battery no debris is going in or over it. Its like saying the dealer has to remove the gas tank, the drive shaft and exhaust pipe to clean under the ICE car. the shell is sealed tight. To go inside they would need to drop down the battery and go for a bunch of procedures to dismantle lol

 

Sounds like you need a new dealer service depot. Your existing service provider is trying to take your money by lying to you about an unnecessary service.

Edit to add: It would probably be the most expensive hosing in human history.

 

Pretty sure Chevy recommends an underbody flush after winter, but I was assuming that would be at a car wash.

 

IIRC, the manual suggests periodically washing the underside, especially in salty regions. But no disassembly.

As @finch4ever already pointed out, there is no battery cover to take off. There is, however, a plastic panel that goes from the transaxle area to the front of the battery and more or less hides the connections on the front of the battery. If you lay down next to the card (or put it on a lift), you can see in there from the side. I haven't had mine long enough to know how fast that gets dirty (or if) and they don't use a lot of salt on our roads here in Florida. 🌤

 

I grew up in Michigan. Thought you just washed a car in the summer unless you were rich enough to put through car wash every other day.

A lot of people drive on the Gulf coast beaches and some of their cars do look like a salt road state vehicle after a few years.

If I needed to keep my car running I guess one could find a way to wash underside via some high pressure washer gizmo with wheels that they already sell. If gunk can get to some area then I'd think washer can too.

The best thing to do is look at 2017 models in your area for clues.

 

The comments echo many of my own thoughts, but I am hesitant to prejudge. I run my car through a car wash as often as practical in the winter and am fortunate to be able to keep it in a garage. I have never had a problem with corrosion on the six previous GM cars I have owned. Service departments do themselves no favours when they promote work that is largely or entirely unnecessary. Thank you to all who have shared their thoughts. Great to have this forum.

 

Recently, when I had my Bolt in for the changeover to winter tires, my Chevy dealership service advisor suggested the that I agree to having the cover on the battery removed for an "under body cleanup". He explained that debris can accumulate in the battery compartment.

If my dealer told me that then I'd look him in the eye and inform him that he just lost a customer.

 

I live in Toronto and agree that with all the salt used in winter here it is good to keep the underbody clean by getting regular carwashes. Toronto GM Dealers are always there to give Bolt owners a good hosing. I think that they excel at this because they kind of compete with each other. Has made it tough to get service (MY2017) here even when you are sympathetic to the changes Dealers will have to go through as BEV's become more prevalent. I would like to say find another dealer, but you might go from the frying pan to the fire.

 

We have a car wash here that has an optional underbody wash, just run it through one of those twice a year should be sufficient I would think.

 

Amazon.com