Hissing sound

Asked by Feb 12, 2017 at 06:55 PM about the 2005 GMC Yukon XL 1500

Question type: Maintenance & Repair

My 2005 Yukon XL just started making a hissing sound and that keeps louder
when I accelerate. There are no warning signs on the dashboard and there is
no smell of running hot.

3 Answers

73,765

This would be the catalytic converter is plugged. Need to get to an exhaust shop to get it replaced.

1 of 1 people found this helpful.

Thanks Rowefast

73,765

Your welcome. If you want to verify, just get it warmed up and park in a dark area, leave the engine run while you look at the cat. It would be glowing orange, which means it is plugged.

1 of 1 people found this helpful.

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