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2016 Tahoe Cylinder deactivation system failure.

  

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I know.  You said don't buy a Chevy...but the thing had only 70K miles on it and I thought it would last a little while.  I don't drive a lot of miles and I needed the room.

Bought it Halloween 2023.  Four/five  weeks ago the camshaft failed and needed to be replaced.  Thankfully, I had purchased one of the aftermarket warranties.  Best Money spent in a while as it covered the entire cost ($11,000+).  Drove it for 4 days, and the cylinder deactivation system failed.  According to the mechanic shop, the replacement parts are on back order while GM rethinks the design of the system, so I have now made two car payments on a Tahoe while it sits in the mechanics parking lot undriveable.  No worries, I have decided to take advantage of the situation and let it burn in real good and hard as to why I should not buy GM products.

The shop said the whatever the hell it is called cylinder system is why the camshaft filed.  The parts of that system are somewhere above $1,000 IF they were available.  The warranty company has agreed to pay everything when the parts become available.  I asked about turning replacing the system and making it just all 8 all the time motor.  The shop said the motor would need to be rebuilt to do it, would cost upwards of $12,000, and in any case if I did it, my warranty would no longer be valid as I would have modified the engine.

...but I see aftermarket kits to turn it off for less than $500?  Any clarity would be appreciated as I am not a mechanic.


2 Answers
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Posted by: @timsingleton

the thing had only 70K miles on it

it happens with as little as 7,000 miles.

 
Posted by: @timsingleton

would cost upwards of $12,000,

a delete kit is less than $1,000 in parts. Doing it while the engine is out of the vehicle is the best time. Inquire at your shop about it.

 

Posted by: @timsingleton

my warranty would no longer be valid as I would have modified the engine.

well you can fix the problem for good, or keep waiting for replacement engines I guess (until warranty runs out)


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You hit the lottery with that aftermarket warrany company, most will do anything to get out of honoring claims, especially large ones.

Aside from the cost of disabling the cylinder deactivation "feature", the shop is correct that if your warranty contract says you can't modify the engine and you do then that's the end of your warranty coverage.

The under-$500 kits are probably sketchy modifications to the vehicle electrical system, either with an OBD2 dongle or hard-wiring into the wiring harness.

Unfortunately now you know why Scotty warns people about buying late-model GM products.


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