01 Silverado Check Engine Light?!?!?!

[brnr17]

anybody help me out on this? i checked all fluids ... ran some seafoam through ... checked gas cap ... if it wasn't for the light i wouldnt notice anything wrong .. it doesnt act differently ... any ideas?

[topdj]

I always though the emission system was covered for longer than the factory warrenty.

correct me if Im wrong

[brnr17]

i have no idea ... the only things i can think of is i put a glasspack with dual exhauts comin out of it ( cause i'm cheap lol ) and ran prolly 7 or 8 tanks through it since then. and we had flooding down here in lacrosse and i ran through a bunch of spots where it was up past my nerf bars ... not sure if that did anything but i have no idea about the warranty part .... anyone else know?!

[bryanhunt]

Isn't that the clean off the gas cap and fillerneck code?

[jhm]

I would go to Autozone or a store like that and have them check the code.

[Zembonez]

Could even be a bad fuel cap. Anything short of a good sealed system can trigger the code.

[jhm]

how long has the light been on?

[brnr17]

turned on last week about friday ... i did go to autozone .. thats where i go the code from ... the guy couldnt tell me anything really ... just the code

[jhm]

turned on last week about friday ... i did go to autozone .. thats where i go the code from ... the guy couldnt tell me anything really ... just the code

I know if the fuel cap is put on loose, the light will come on and stay on for a while even after you tighten it. The guy at emmissions testing checked my fuel cap but didnt tighten it and the light came on and stayed for a few days after I found it loose and tightened it.

[brnr17]

well i tightened it 2 days ago so we'll see what that does ... i didn't put gas in it for a few days before this happened tho so i wouldnt think it would just come loose like that ... but it's tightened now ... for some reason i just dont think that's what it is ... god hates me and that would just be way to easy of a fix LOL

[bartlanz]

Share the Codes... If you dont tell them to us, we cant help you with them...

[brnr17]

Share the Codes... If you dont tell them to us, we cant help you with them...

ummm it's in the title!

[brnr17]

EVAP SYSTEM FAILURE was the message

[brnr17]

?

[98 Z71 SLT]

Easy fix.

 

Go to your GM dealer, and pick this up:

 

GM has an updated Evap Vent Valve Service Kit.

 

Follow the instructions that come with the kit. I just fixed another 01 Silverado last week that was triggering the same P0440 code.

 

If you know any GM Techs...they can print you a GM TSB on the condition.