1999 Chevy Silverado service code

1999 CHEVROLET SILVERADO
180,000 MILES • V8 • 2WD • AUTOMATIC
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GCV6364
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  • 1 POST
shows P0446 What is it? what does it do? how do I fix it?
Jul 3, 2008 at 2:35 PM
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DENNYP
  • ✓ASE Certified Mechanic
  • 1,824 POSTS
  • ASE Certified Mechanic
EVAP vent performance. Most common cause is a bad evap vent valve near the fuel tank.
Jul 9, 2008 at 9:13 AM
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