This is the part I bought, which all the parts websites said is the correct part for my 2004 Tahoe LS.
![10yj912.jpg 10yj912.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282922-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
But this two-piece kit is also available, althought the websites say this is NOT the right kit for my Tahoe.
![w7gp4.jpg w7gp4.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282923-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Here is what I see when I crawl under my truck.
This is near the back of the gas tank. This rectangular piece looks a lot like the one in the two-piece kit above.
![157owvb.jpg 157owvb.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282924-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
This is the Evap Canister mounted on the side of the gas tank.
![10iik9t.jpg 10iik9t.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282925-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
One of the lines from the Evap Canister leads to the unit pointed to by the arrows in the next three photos. I can't tell if this is the other part shown in the two-piece kit above. Does anyone know what this part is?
![2zf64w6.jpg 2zf64w6.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282926-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![16av337.jpg 16av337.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282927-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![11c8678.jpg 11c8678.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282928-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Finally, this is a little more forward. I'm not sure what the arrow is pointing at, but I don't think it's part of the evap system. Maybe part of the 4WD shifting system? I have no idea.
![qrzqrq.jpg qrzqrq.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282929-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Here are a couple of GM diagrams I found, and a couple of pages from the GM manual. I see there is some confusion between "purge valve" and "vent valve". The manual says the purge valve is under the hood, on the intake manifold. But I have looked at that, and the part I bought is much bigger. I think other GM trucks, especially pickups, have the part I bought near the gas tank. And I think what I bought is a "vent valve" regardless of the word "purge" in the name of the part.
![df83g9.jpg df83g9.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282930-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![29z3312.jpg 29z3312.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282931-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![35iybur.jpg 35iybur.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282932-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![21dlzpz.jpg 21dlzpz.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282933-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Any ideas on what I have here?
THANKS.
![10yj912.jpg 10yj912.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282922-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
But this two-piece kit is also available, althought the websites say this is NOT the right kit for my Tahoe.
![w7gp4.jpg w7gp4.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282923-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Here is what I see when I crawl under my truck.
This is near the back of the gas tank. This rectangular piece looks a lot like the one in the two-piece kit above.
![157owvb.jpg 157owvb.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282924-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
This is the Evap Canister mounted on the side of the gas tank.
![10iik9t.jpg 10iik9t.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282925-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
One of the lines from the Evap Canister leads to the unit pointed to by the arrows in the next three photos. I can't tell if this is the other part shown in the two-piece kit above. Does anyone know what this part is?
![2zf64w6.jpg 2zf64w6.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282926-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![16av337.jpg 16av337.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282927-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![11c8678.jpg 11c8678.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282928-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Finally, this is a little more forward. I'm not sure what the arrow is pointing at, but I don't think it's part of the evap system. Maybe part of the 4WD shifting system? I have no idea.
![qrzqrq.jpg qrzqrq.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282929-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Here are a couple of GM diagrams I found, and a couple of pages from the GM manual. I see there is some confusion between "purge valve" and "vent valve". The manual says the purge valve is under the hood, on the intake manifold. But I have looked at that, and the part I bought is much bigger. I think other GM trucks, especially pickups, have the part I bought near the gas tank. And I think what I bought is a "vent valve" regardless of the word "purge" in the name of the part.
![df83g9.jpg df83g9.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282930-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![29z3312.jpg 29z3312.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282931-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![35iybur.jpg 35iybur.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282932-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
![21dlzpz.jpg 21dlzpz.jpg](https://www.tahoeyukonforum.com/data/attachments/282/282933-32af06ac4b80d728f7e4c8780eb6b6d7.jpg)
Any ideas on what I have here?
THANKS.