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Chevrolet
Silverado
Trouble Codes
P Codes (Powertrain)
P0400 - P0499
P0446
1999 Chevy Silverado service code
1999 CHEVROLET SILVERADO
180,000 MILES • V8 • 2WD • AUTOMATIC
GCV6364
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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
CERTIFIED EXPERT
1,824 POSTS
EVAP vent performance. Most common cause is a bad evap vent valve near the fuel tank.
Jul 9, 2008 at 9:13 AM