SScratch Posted April 8, 2015 Report Share Posted April 8, 2015 Hello, guess i'll start with introductions. had a RCSB that I was making a SS out of but some drunk hit me and totaled it... but on the bright side their insurance paid for my new 03 SSS haven't had much trouble with the truck till recently and I LOVE it. to the original title. I have searched every where on this site and the old innerweb for answers but keep coming up empty. I have a P0446 code and its throwing a CEL. I have replaced the evap solenoid (mine is an 03 so it has the square box) and the purge valve, checked all lines with no obstructions, replaced the gas cap (twice), and still getting the code I have read and read about this stupid code and I see that there is a campaign from GM for this but I have noticed that the update kit contains a cylindrical solenoid along with the relocation box. i replaced the Evap solenoid with the same thing a week ago so doubt that it would fail in that little of time... but who know with this EVAP crap. also if some one could tell me wth this thing is and what it controls I would appreciate it. Was going to take it into a shop to get a smoke test done but figured I'd feel you fellas out first. any help you could provide is greatly appreciated. thanks, -W Quote Link to comment Share on other sites More sharing options...
SScratch Posted April 9, 2015 Author Report Share Posted April 9, 2015 anyone? where's Mr. P Quote Link to comment Share on other sites More sharing options...
EXGM Posted April 9, 2015 Report Share Posted April 9, 2015 Had any rain or driven through a large puddle recently? Reason for the relocation kit is they get water in them and it gets f'd up... and sets the light.... saw a TON of them with water in them.... Quote Link to comment Share on other sites More sharing options...
70chevy03ss Posted April 9, 2015 Report Share Posted April 9, 2015 It's a common problem if you top off a lot while filling up with gas. Also it's not so much water it's just road debri and grime. Had to do this to mine it's pretty easy pain in the but to get to but. Quote Link to comment Share on other sites More sharing options...
SScratch Posted April 9, 2015 Author Report Share Posted April 9, 2015 we've had a lot of snow down here in dallas a couple of months ago but nothing since I replaced the part a couple of weeks ago. IYO do you think it has already failed? let me input some back ground info. It first had a P0442 code which is why I began replacing all the EVAP parts. Well didn't fix it so I dropped the fuel tank to find that whoever was into it last I guess replaced the fuel pump but didn't put the locking ring on all the way so the spring loaded mechanism was keeping the fuel tank from sitting flush on the tank. It was up about 5 inches. I dumped tank, completely cleaned out, cleaned up fuel pump, and reinstalled properly lol. Code stayed off a couple days then returned with the 0446 code. should I just go ahead and do the smoke test? is there a way to test those pesky solenoids for functionality? I can hear a pretty loud wisle so to speak coming from under the cab right in that general area. so frustrating. thanks again for the input does anyone know what the box that the hose from the solenoid goes to? I posted pic of it in original post. Quote Link to comment Share on other sites More sharing options...
EXGM Posted April 9, 2015 Report Share Posted April 9, 2015 Its the charcoal canister... if it hasn't been replaced it could be full of water or road debris or.... Chances are once you cleared code it take certain conditions to run emission test (for example certain speed fuel level has to be between certain levels etc etc.) once it ran test it didn't pass due to a reason. Did you use GM parts or aftermarket? My guess without actually seeing is you may have contamination in the canister... but you could also have a wiring problem... hole in a line... the possibilities are endless.... Quote Link to comment Share on other sites More sharing options...
SScratch Posted April 9, 2015 Author Report Share Posted April 9, 2015 all a/c Delco on the parts. I'm thinking that could be the culprit as its the only thing I haven't changed. would the smoke test be able to tell if it is the problem? Quote Link to comment Share on other sites More sharing options...
EXGM Posted April 9, 2015 Report Share Posted April 9, 2015 all a/c Delco on the parts. I'm thinking that could be the culprit as its the only thing I haven't changed. would the smoke test be able to tell if it is the problem? Well you used good parts! Smoke test only checks for leaks. Unless you suspect a leak or broken line I don't think that is going to tell you anything. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted April 17, 2015 Report Share Posted April 17, 2015 It's the usually the vent solenoid valve (vsv) on the back side of the fuel tank, common problem. Quote Link to comment Share on other sites More sharing options...
SScratch Posted April 24, 2015 Author Report Share Posted April 24, 2015 mine wasn't on the back of the tank fireman... it was bolted to the frame right in front of the tank right where the cab & bed separate. Do you know if the updated kit GM suggest per the bulletin will work? I don't see why it would fail that quickly as I replaced everything with the exact same parts (except for the box that the hose connects to been told its a charcoal canister) my question is I though the little square box was the charcoal canister? any ideas? Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted May 4, 2015 Report Share Posted May 4, 2015 It will work, I did it to mine 6 years ago. Quote Link to comment Share on other sites More sharing options...
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