I had the GM 3.6L in my CTS Sportwagon and it needed a timing chain replacement at 42,000 miles. Literally 2 weeks after I bought it I had to drop $3k on it.
Cons: failed at 42,000 miles, expensive repair
Mileage: 67592 km
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GM 3.6L LY7 V6 Timing chain issues, oil starvation, sounds terrible.
Cons: timing chain issues, oil starvation
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