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Forum: Chevrolet & GMC Truck General Forum 12-15-2013, 11:14 PM
Replies: 4
Views: 13,199
Posted By riyarobin
Hissing sound indicates a crack in the exhaust...

Hissing sound indicates a crack in the exhaust manifold, exhaust pipe or a leaking gasket. A chugging noise could mean a blockage in the exhaust system.
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