Jump to content

01 Silverado Check Engine Light?!?!?!


Recommended Posts

Posted

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?

Posted

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

correct me if Im wrong :crackup:

Posted

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?!

Posted

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

Posted

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

Posted
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.

Posted

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

Posted

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.

Archived

This topic is now archived and is closed to further replies.

  • Latest Articles

  • Posts

    • You can install tailpipes that direct the exhaust sideways vs the OEM one that goes straight back. There are several on the market, do you own research. HOWEVER, you need to make sure the Venturi vents are still intact, otherwise it will throw a engine code. There is a sensor somewhere that detects back pressure on the exhaust. And if it doesn't collect the correct metrics, it will throw the truck into limp mode. 
    • "Teardown" is complete. Head surfaces are clean and ready, new intake is prepped and ready. Coolant drained and water pump is removed, radiator is removed, new hoses and pump are ready.   The replacement intake is also from a '95 (with I think 260k, the odometer said). Noticeably less pitting where it covers the rear coolant passages. I'm not sure if that's a tribute to more frequent use, more frequent coolant changes/upkeep, or if the intake was machined at some point. But it appears I found a good one.   My coolant hoses were original, and the lower hose still retained the factory spring inside. It's not really rusty, but it's got deposits all over it. Unsure if I should re-install it (will thoroughly clean it first). Someone said hose technology has gotten better since 1995 (has it?) and I don't need the spring. I think modern EPDM is what made those hoses last from 1995-2026, so it's a question of how much suction can the water pump really pull, and will it collapse the hose without a spring?   I'm stopped and waiting for parts, however.   When I first brought the truck home, the fan was intermittently hitting the radiator shroud. I could see someone had monkeyed with the shroud (put a bunch of cardboard as a spacer between the upper/lower shroud halves. Someone said the motor mounts have likely failed and the engine has sagged. I wasn't sure I believed that. The engine is really solid in its mounts: To remove the old intake I *just* nearly permanently welded to the heads with freshly cured RTV and gasket snot two weeks ago, I literally had to use the arms on my lift and a chain with a bolt attached to the intake to pull it loose. It almost picked the front of the truck off the ground before ....scuuuuuuuuuuup.... I could actually hear the gaskets tearing and it broke loose and the whole truck settled back down. Motor barely moved.   SO, those parts I'm waiting on... The lower radiator mounts/bushings had completely failed. The radiator needs to be insulated from the rad support, and the bushings help the rad stand at the correct height. The plastic "baffle" was also destroyed at some point. Someone had attached the shroud to it incorrectly, overlapping a joint that should have been underlapped, creating another suspect issue potentially causing things to hit the fan. Broken tabs, side is busted off, and it's perma-formed/bent where it was jimmied incorrectly.   The baffle? Unobtainum. Long since discontinued from GM, of course. Aftermarket/capa/chinese? Also unobtanium. In GM's infinite wisdom, it appears there are at least two different variations whether the Blazer is 2 or 4 door, and I can't yet tell if they shared the same part with the S-pickups. Plan B, if I can't find a viable used one, will be to create a bracket to re-assemble the critical joint I need to seal a gap with the shroud. But that will bug me, it won't be...perfect.   The water pump bolts appear to have been installed with...plumber's putty. I guess, sure, if it works...? I've found a few "backyard fixes" like that. Someone's been here before....   If I can't find someone to jam bamboo under my fingernails to fill my free time this week I think I'll install the driver's power window motor and replace the rear door speaker that's inop. I've got a genuine GM "9.5" ohm working replacement. Why GM used a non-standard resistance....nevermind. Of course they did, you can get more sound from a cheap factory amp that way.   And the saga goes on...
    • // Thank you, also for your  response. More information is always good. This 2013 GMC is most likely my 'forever truck"-I'm 77 and retired...and truck only has 42K on it-very clean-so I try to keep it that way.  Tks again for your  response- glenn
    • I started my install this weekend. Everything was pretty straight forward but I ran into one issue with running power through the firewall. The nipple grommet on my High Country already has a small harness running through it - has anyone else ran into this issue? And on the engine bay side, does the wire basically just penetrate the factory wiring boot? I did this on my '22 Trail Boss and it seems much easier but thats been a few years. My other thought would be possibly drilling a new hole adding a rubber grommet just to the lower left of the factory hole. Thoughts?   Has anyone used a T-harness off the Bose amp and obtained power from there? It seems a little odd that such a small amp needs 3 power leads
    • ///// Ok--Thanks for that info--I could not find yesterday when I looked for the specs on that NAPA filter what I wanted. Their website is not very user friendly. I buy all teh filters for  our three vehicles once or twice a year. Have always run NAPA Gold on everything I own....I buy it thru my Son's account for his business-which he has a Heavy Equipment repair shop-one reason he uses NAPA so much-they have such a full line of coverage for just about anything/anywhere- He gets s  good discount because of volume bought. Anyway-Thank you -Sir for your response.   glenn
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...