I have a CEL on my Pontiac Montana SV6 2008, 3.9 Flex Fuel engine, short wheel base model. It should be very similar to Chevy Uplander 07 - 08. A local deal pulled codes P00446 (Evaporative Emmission Control System Vent Control Circuit) and P00455 (Evaporative Emission Control System Leak Detected (no purge flow or large leak)) We have not done any repair just yet but an emission test is coming up. My research pointed me to this part# ACDelco-214-2324 - SOLENOID,Evaporative Emission Canister. You can see it on this link. http://www.rockauto.com/catalog/moreinfo.php?pk=2957277&cc=1442622 Anyone knows the exact location of this part on my van? and if I am on the right track to fix the CEL? Some Internet sources suggested it is locate on top of the gas tank toward to the front. I would appreciate if anyone can help with installation procedure and if that involves dropping the entire gas tank or if dropping the front end would do. Another part is VALVE,Evaporative Emission Canister PURGE SOL, which is located just under the engine cover. http://www.rockauto.com/catalog/moreinfo.php?pk=904303&cc=1442622 I do have some tools but I am not a serious DIY. Thanks in advance.