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2004 Chevy Impala ck engine light on

Tiny
RJDJ007
  • MEMBER
  • 2004 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 74,000 MILES
Have po455 evap emission control system leak gross have replaced gas cap with GM one
Monday, January 21st, 2008 AT 6:08 PM

2 Replies

Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Gross leak is usually caused by a broken emission line or a stuck open vent valve. Especially in new england where im from, the vent valve is open to road debris and usually I find sand in them jamming them open. Hope this helps
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Monday, January 21st, 2008 AT 6:13 PM
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Im not 100 percent on your car but they are usually right next to the charcoal canister in the rear of the car by the gas tank.
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Monday, January 21st, 2008 AT 6:50 PM

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