P0455 EVAP Large leak detected HELP updated. - TerrainForum.net: GMC Terrain Forum
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post #1 of 3 (permalink) Old 12-22-2018, 01:13 AM Thread Starter
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Join Date: Sep 2018
Location: Michigan, USA
Posts: 25
Arrow P0455 EVAP Large leak detected HELP updated.

Hello everyone,
Since I've been a member of this forum, I've asked y'all over and over again how to fix this issue. Today, I would like to leave you some help from my side as well.
P0455 code as read by the OBD2 scanner is a large leak detected in the EVAP system. Since GM decided to mount these sensors in the un-protected areas like underneath the vehicle in this case, they do tend to go bad.
While searching for parts for this issue, you will find that Dorman as well as ACDelco makes these parts. The vent control valve which needs replacing at this juncture is mounted in front of the charcoal canister. The charcoal canister is a $220 part at many online stores. Dealer is higher.

So the vent control valve mounted in the 2010 Cadillac SRX has been redesigned by the manufacturer so if replacement is necessary, in my case it is, the vent control valve is readily available in Auto Zone etc (special order/not stocked) but GM notates IT NEEDS TO BE REPLACED WITH A NEW HARNESS.
I am leaving y'all the part numbers and prices of the same should you need it. Merry Christmas 2018!!! :-)

AC Delco Vent Control Valve: Solenoid $52.21 at any GM dealer Part # 13575702 or CHEAPER online/ I got mine for $25 at Cardit.

AC Delco wiring harness part number: 20922087 $62.00 Dealer item only.
Attached Images
File Type: jpg original vent control-1.jpg (60.0 KB, 14 views)
File Type: jpg original vent control-2.jpg (77.0 KB, 15 views)
File Type: jpg ado-214-2312.jpg (12.0 KB, 15 views)
File Type: jpg 2011-2012-CADILLAC-SRX-Genuine-GM-HARNESSFUEL-SDR-WRG.jpg (18.3 KB, 13 views)
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post #2 of 3 (permalink) Old 12-22-2018, 11:18 AM
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Join Date: Aug 2011
Posts: 491
WOW!! $220.00 for a vapor canister?

If you are being charged that much locally they ought to be kissing you as you leave the store.

Let me introduce you to my online parts friend, Rock Auto.

They will sell you a complete ACDelco vapor canister for $78.00

It was an OEM fit and yes it required the (included) jumper wire.
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File Type: png Screenshot (158).png (172.2 KB, 11 views)
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post #3 of 3 (permalink) Old 01-04-2019, 11:23 AM Thread Starter
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Join Date: Sep 2018
Location: Michigan, USA
Posts: 25
Did not buy the vapor canister yet. LOL that was internet price. Somewhere, GM parts or similar. Just got canister solenoid and am heading to mechanics shop to get it put on. Wish me luck that the dang thing runs worry free for a year. That's all I ask.
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