Gmc

Asked by GuruB6K7F Jan 19, 2019 at 04:43 PM about the 2003 GMC Yukon XL 1500 SLT

Question type: Maintenance & Repair

I have a 2003 GMC Yukon XL.  We changed o2 sensors and it still throws a code
saying 02 sensor bank 2 sensor 1.  Also changed the engine coolant sensor.  
We have checked to make sure the sensors are working.  Where do we go from
here?

1 Answer
22,660

Guru9FSV8 answered 5 years ago

If this has the 5.3, you need to suspect the intake gasket. Every 5.3 eventually needs new intake gaskets.

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