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2004 Chevrolet Tahoe Code P0455

Tiny
SAMUEL5710
  • MEMBER
  • 2004 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 2WD
  • AUTOMATIC
  • 139,896 MILES
I recently turned my truck on this morning and the engine light poped up I went and checked for codes at auto zone and the P0455 code popped up and it gave me 4 options on the receipt not sure were to start or what to do.
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Tuesday, October 13th, 2015 AT 6:12 PM

2 Replies

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
P0455 - Evaporative Emission Control System Leak Detected (gross leak)

This is the code that everyone associates with a loose gas cap, but there are a lot of other possibilities. Start with a visual examination of the hoses and clamps. If you don't see anything obvious, your mechanic will use a smoke machine to inject a white, non-toxic smoke at 2 psi, then watch where it sneaks out.
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Tuesday, October 13th, 2015 AT 7:14 PM
Tiny
SAMUEL5710
  • MEMBER
  • 2 POSTS
Ok thanks alot
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Tuesday, October 13th, 2015 AT 7:20 PM

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