C7 Triple Flush Question

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Aug 23, 2018 | 10:07 AM

bigdaddyscott

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7th Gear

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C7 Triple Flush Question

I recently had this service performed at my local dealer to address torque converter shudder. My question is this: Approximately how many miles would you expect the technician to put on your car while performing this service?

I thought there were an excessive amount in my case. Enough to warrant a conversation with the Service Manager who said that it seemed reasonable. I've read the TSB, and frankly don't agree. It was my first trip to this dealer as I am a new owner. I am trying to find a reliable dealer to build a relationship with, but this was a red flag to me. Maybe I am just being a little paranoid but I'd be very grateful if some of you in this forum might give me an idea of what you think is reasonable.

Thanks,

BDS

Aug 23, 2018 | 10:34 AM

madrob2020

Melting Slicks

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From: MOUNTAIN HOME Arkansas

All you'll get here are OPINIONS not based on any absolute tech or service manual references. One tech may just drive it 5 miles on a highway to get to speed & get it into ECO mode to check for recurrence of shudder. Another might feel 50 miles of combination city/hwy driving to ensure it's better. They want to TRY & make sure it's fixed so you are happy. Let us know if you feel the shudder is better/gone.

Aug 23, 2018 | 10:37 AM

laserdude2215

Burning Brakes

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From: San Dimas CA

It's two runs at less than 10 mph for 10 minutes on the hoist, so that's 3.3 miles minimum. Plus a test drive for 2-3 miles afterward, so I say about 7 would be reasonable.

Aug 23, 2018 | 10:49 AM

madrob2020

Melting Slicks

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From: MOUNTAIN HOME Arkansas

Quote:

Originally Posted by laserdude2215

It's two runs at less than 10 mph for 10 minutes on the hoist, so that's 3.3 miles minimum. Plus a test drive for 2-3 miles afterward, so I say about 7 would be reasonable.

Not starting something, but inquiring minds want to know where you got this info. Thanks

Aug 23, 2018 | 12:14 PM

Mr. Jones

Drifting

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From: Bedford Va.

BDS
So how many miles did they put on your car?
I had the triple flush done about a year ago.
The tech needs to take the car to a location where it can be run at a steady speed to feel for vibration.

Aug 23, 2018 | 01:53 PM

bigdaddyscott

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7th Gear

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They put 40 miles on the car. The dealership is only a mile from the interstate where they could cruise.

Aug 23, 2018 | 02:04 PM

bigdaddyscott

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7th Gear

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I have also had the check engine light start flashing a couple times. Second time was today after a hard acceleration (and a backfire). My traction control button is also stuck in the down position, which they have ordered a new one. I bought this 2016 z51 about a month ago and I have about 6 more weeks of factory warranty left. Guess I will give these guys the benefit of the doubt for now because I need to get these issues resolved and this dealer is very convenient and been around a long time. Hoping to get everything ironed out before then. Thanks.

Aug 28, 2018 | 09:29 PM

Gearhead Jim

Team Owner

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From: Far NW 'burbs of Chicago

St. Jude Donor '13

Might be time to contact Dennis Fichtner about a GM extended warranty. IIRC, they have a 30day/1k miles waiting period before coverage kicks in, so buy a bit early.
Your powertrain warranty runs longer, but there's lots of non-powertrain stuff on the car to go bad.