Rear MRC shocks are prematurely gone ...
 

With only 71,000 KM / 44,000 miles on the ODO the rear shocks are gone. I left the car parked in a heated garage for a month and when I took it out again it felt very rough going over bumps; my local mechanic took the car up and the rear shocks are both leaking oil.

The mileage is mostly highway driving and I only have a few track days with the car + I know for sure I did NOT hit any potholes that could have damaged the shocks. I just find it mind boggling that on a modern car the shocks are completely gone so soon. To make it worse, to have them replaced at the local dealer it is going to cost me about 2200 CAD / 1700 USD. I have a few questions:

1. Is there any chance to claim this on warranty? I am out of bumper to bumper warranty but to me something doesn't seem right, the shocks failed so early and while the car was parked ...

2. After replacement, do the new shocks need any Magnetic Ride Control calibration and connection to a specific GM software? My local mechanic can change the shocks if I order the parts online, but he doesn't have access to GM software in case they need to be calibrated. My local mechanic labour fee will be lower than what the dealer is asking, at least I can slightly minimize the $damage.

3. Does anyone have the part number for both rear (left and right) Magnetic Ride Control shocks?

take it to the dealer see what they can do! check part# on thatgmpartsguy.com

The dealer already said they can't replace it on warranty. Would it help to call GM head office and ask for to have it changed under warranty?

you can try but you might have to just bite the bullet and replace them

I have looked around and the cheapest I could find the parts was Amazon. The key is whether these shocks need any software calibration or not. If the only thing that needs to be done is to change them mechanically, my mechanic can change them. If software calibration is needed, then I have no choice but to go to the dealer.

i dont think anything else is needed just unplug and remove and install and plug in new ones

Wow those are a lot more than I assumed they were to replace.

Surprisingly, I found OEM shocks the cheapest on Amazon. They arrived and they were legit and half the price of what the dealer was asking. I managed to get them installed with my local mechanic and everything is working nicely. Total cost was about 860 CAD / 675 USD. Compared to 2200 CAD / 1700 USD dealer quote, I am OK in the end that I didn't have to spend a ton of money to get them replaced.

Still, I am not happy, shocks that leak at only 71,000 KM / 44,000 miles while the car is sitting in the garage is not OK with me.

Now that I read this probably I wouldn't look for a MRC car in the future. Replacement cost is too expensive.:confused0068::yikes:

-My 5th gen Camaro ZL1 had the MRC shocks and I didn't felt a great difference while driving and trying the different settings.
-Neither of my '14 Corvette C7 Stingray Z51 nor my '16 Camaro SS came with that option, and I didn't really missed it, the base shocks were greatly balanced between sport and confort driving and I normally enjoy spirited DD.:thumb:

No calibration or anything should be needed. Should just be able to put them on and go, just make extra sure the height sensors on the suspension arms aren't damaged in the process.

So the 5yr bumper to bumper was not valid for this? Or did they call shocks powertrain?

I think you might have the warranties flipped. Bumper to bumper 3yr/30k miles. Powertrain (engine and trans only) is 5yr/50k.

The best thing to do with these MRC components is to use them and not let them sit for long periods of time...

84000 on my 2017 and no issues so far. I daily drive and switch between modes all the time.