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2012 Yukon Denali - Failed Cats - Looking for Solutions
The Vehicle: 2012 Yukon Denali XL w/ 6.2 L Flex Fuel The Problem: One or both of the catalytic converters on my wife's Yukon Denali has failed to the point that the vehicle would not stay running and would make a terrible squealing sound like the belts were slipping. Codes 0420 & 0430 appeared...- usmcskeeter
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- Replies: 6
- Forum: Engine & Drivetrain
