2004 Yukon Denali Evap purge canister & valve solenoid

Locating & replacing the emission Evap sensors

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Replacing Vent Valve Solenoid & Purge Valve Solenoid (EVAP Valve) 2005 GMC Yukon
When you get a check engine light, your parts store can test it with a little electronic device - ask for the check engine light tester. They go by many names, but look for EVAP Valve or Vent Valve/solenoid & Purge Valve/solenoid. The one in the rear of the car, near the gas tank, is known as the "Vent Valve Solenoid Canister." The one in the engine compartment is called a " Purge Valve Solenoid." Replacing the one in the engine compartment did the trick. I'd start by replacing that one first then test it. Cost: $25.97 Vent Valve Canister (fuel tank one) $35.72 Purge Valve (engine compartment one) TOTAL: $61.69 GM Dealer quote: $281.00 I saved $219.31

P0449 Vent Valve Testing EVAP Systems
Get that power probe for less here on Amazon → http://www.amazon.com/gp/product/B00G4YUWMC/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B00G4YUWMC&linkCode=as2&tag=httpww wyou00f-20&linkId=RAPWOQ5W3S3TQQP7 Please watch Mandy's video for a more accurate description of the working relationship of the computer, purge solenoid, pressure sensor, and vent valve in an evap system here → https://www.youtube.com/watch?v=IzfR84T6pBY P0449 Vent Valve Testing EVAP Systems

Automotive Evaporative Emissions - Part One
From www.autofixworld.com: Part One of a two-part video describes how onboard monitors test vehicle fuel containment systems for fuel vapor leaks. Three types are discussed: pressure test; vacuum test; and natural vacuum leak detection.

Quick Easy Fix P0449 P0455 Evap Codes on Chevy Silverado 2007
This is the quick and easy way to clear the P0449 and p0455 codes on a Chevy Silverado. Process is similar for all Silverados. Link to AC Delco Solenoid kit on Amazon http://www.amazon.com/gp/product/B000S2SKIY/ref=oh_details_o03_s00_i02?ie=U TF8&psc=1