Jump to content

2004 Silverado 1500 emissions not ready

Luke Morgan
 Share

Recommended Posts

Luke Morgan New Member

Luke Morgan

Posted
Posted

My truck won't pass emissions. It shows "not ready" for the Evap system, catalyst, and an o2 sensor. I drove it for about 500 miles between tests. I got looking at the vehicles history and it looks like the "not ready" issue has been ongoing for this truck? Any ideas?

Chris Senior Enthusiast

Chris

Posted
Posted

There is a drive cycle that has to be followed to make them set and it is a pain in the ass. Look it up. Try it. If that doesn't work I don't know. I've tested with the Evap not ready.

working on it Enthusiast

working on it

Posted
Posted

There is a drive cycle that has to be followed to make them set and it is a pain in the ass. Look it up. Try it. If that doesn't work I don't know. I've tested with the Evap not ready.

I had multiple problems to solve before my HHR was ready to test. I had parked it a year earlier, when the sticker expired. I fixed ABS sensor, MAP sensor, fuel cap leak, and finally the Evap vent solenoid. I had to restart the DRIVE CYCLE 5 times before I was done, and even so, I couldn't get the EVAP not ready to go away. Total 1100 miles; 200 after last repair. Texas passed it with the Evap still unset. I followed this Drive cycle :post-12584-0-58104600-1484959408_thumb.gif Good luck with your problem; I just got a P0135 code this afternoon, as well, on my '04 2500HD. I cleared the code, and will see if it sets again. I have 8 months to complete that next drive cycle!

post-12584-0-58104600-1484959408_thumb.gif

post-12584-0-58104600-1484959408_thumb.gif

post-12584-0-58104600-1484959408_thumb.gif

working on it Enthusiast

working on it

Posted
Posted

Some scanners can force to evap leak test

Not any of mine. I started with scanning apps: Torque Pro, then OBDWiz using two OBD dongles : a BAFX then an OBDLink LX (used the BAFX until I needed the LX to use the OBDWiz app). Both pps & dongles use a smartphone or tablet to give me the live data and OBD readiness status. I bought an Innova 3100i scan-tool to verify the apps' data, and to read my ABS faults (the apps cannot), I bought the 3100i for cheap ($75), but wish I'd ante'd up another $100 to get the 3130 bidirectional tool. That one will run the EVAP test.

5829BMG Enthusiast

5829BMG

Posted
Posted

Drove one 600 miles and couldn't get it ready. Disconnected the battery touched the two terminals together to drain capacitors then reconnected and drove 10 miles trying to follow drive cycle as best as possible and it passed all systems ready. Try it and see what happens.

Chris Senior Enthusiast

Chris

Posted
Posted

Not any of mine. I started with scanning apps: Torque Pro, then OBDWiz using two OBD dongles : a BAFX then an OBDLink LX (used the BAFX until I needed the LX to use the OBDWiz app). Both pps & dongles use a smartphone or tablet to give me the live data and OBD readiness status. I bought an Innova 3100i scan-tool to verify the apps' data, and to read my ABS faults (the apps cannot), I bought the 3100i for cheap ($75), but wish I'd ante'd up another $100 to get the 3130 bidirectional tool. That one will run the EVAP test.

I have the 3160d. I think I got it for $90 on amazon a couple years ago

  • 5 years later...
working on it Enthusiast

working on it

Posted
Posted (edited)
On 1/20/2017 at 7:11 PM, Chris said:

Some scanners can force to evap leak test

Welp, you're right; five years later, I finally have a scantool that will force the Evap test (but the I/M monitor still shows Evap as incomplete, though the "tests" all reported "ok"). I used a Foxwell NT510 Elite, that I bought with dual programming (for GM and BMW) in January '21. First time I tried it on the 2500HD, though. I'm about to get the yearly inspection on Monday or Thursday, so I was checking the monitors (one incomplete monitor is OK in Texas), so I scanned/tested the truck today.

 

It showed nine powertrain faults, of which none showed up on my Innova 3100i scantool. Some of them were evap codes (there before I fiddled with the active tests), some were cruise control (which I added years ago, so the ECM might not recognize), and a few were transmission-related (I have first gear slippage starting); of course I wanted to, but couldn't clear them, fearing a repeat of the extended drive cycle nightmare I had in 2017. I'll clear them after the inspection!

Edited by working on it

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • PhilB
      Gas Prices

      By PhilB · Posted

      There you go again.  Preaching your politics and worse case scenarios.  And what are you doing to make the world less polarized? 
    • asilverblazer
      VSE CCV Bypass - Anyone have this installed in their L5P?

      By asilverblazer · Posted

      Maybe.   Maybe.   I don't want to be the one that needs help and can't get it when I need it. That is a legitimate complaint, and how they respond to those legitimate complaints is a big red flag to me.   I don't care how good the product is their conduct is subpar. Some people are fine supporting that for the sake of getting the product they want. I'm not.   To be fair, I haven't seen or touched their product in person to determine for myself the quality of it. I'm not offering any opinion on that either.
    • KARNUT
      Gas Prices

      By KARNUT · Posted

      So if you do nothing and they act on their threats like death to America or Israel. And possibly a nuclear war. Whoever survives wonders why didn’t they listen? Or we do something like every President has said they can’t get a nuclear weapon. We’re at the 10 yard line and it happens the time is now or never. I think I’m ok with paying a little more for gas for awhile. It’s a shame that we now live in a world that’s so polarized. 
    • newdude
      6 Speed vs 8 Speed

      By newdude · Posted

      4-5-6 fails due to design.  Not enough clutches and not enough piston to clutch surface area.  Also the backing plate can bow.     I'd say converter is two part.  The design of converter chosen, and factory tuning of it aka slipping it in D (also L6) for AFM purposes, as well as locking it up in 2nd gear, sometimes 1st, also it will partially lock up at light loads.  All because CAFE/fuel economy requirements.  A billet converter on the stock tune might hold up better, but would still be subject to the stock tuning and how its designed to lock or partially lock.     The most baffling part to me, is the 2007-2013 6L80s didn't have the failure rate the 2014-2018 ones do.  I've been where I work for almost 17 years now, and I recall maybe 3 or 4 of the 07-13 transmissions getting pulled for something.  14-18 on the other hand, it was at a minimum one a month being opened up.    If I had to guess, I'd say the tuning for the gen 5 engines/6L80 setup and its fuel economy goals had a good bit to do with it.  Also, it was bankruptcy time during these years, so I'm thinking some cost cutting was done for the launch of the K2XX trucks.  See also now the 10 speed valve body issues (more cost cutting).  They blow out some mesh screen in the spacer plate, undersized check ball, and the feed limit valve was aluminum and wears out prematurely.         I don't think it was the HP jump from the gen 4 to gen 5?  The 6.2 in the 07-13 trucks was good for 380-400hp during its life/states of tune, and the 5.3 did 310-320hp.   
    • Atlas
      Gas Prices

      By Atlas · Posted

      All this might be worth it had we actually recovered enriched uranium, a WMD, or an actual nuclear deal with oversight. This is a flub of epic proportion, and they all know it.   $5.10 at a station reporting $4.99 last week. Here we go....

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...