Jump to content

3.0 Duramax P1488 CEL code

Ogee1

By Ogee1
in Troubleshooting, Warranty & Recalls

 Share

Recommended Posts

Roomadder New Member

Roomadder

Posted
Posted

This problem also seems to affect the Silverado 4500-6500HDs.  My 2019 4500HD is currently in the shop for the 4th time for the P1488 code.  It has already had the particulate filter and soot sensors replaced and new software downloaded but the problem still persists.  I make a living out of this truck so it really hurts me when it is out of service.  I hope GM figures out the problem soon.

  • 2 weeks later...
  • Replies 46
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Popular Days

Popular Posts

Pinnacle
Pinnacle

Shut up with your crapota bullshit already and dont come on here saying no maker has this figured out dont speak on behalf of other makers you know nothing. Toyota has the best diesel around the world

1997SierraSLT
1997SierraSLT

Toyota is intelligent enough to not release unproven and unreliable garbage to market and allow their customer base to be guinea  pigs.     One would think companies such as Caterpillar, Det

yousaveone
yousaveone

People need to quit relating the other Duramax to ours. Their not even ALMOST the same. the big diesels are designed by Isuzu and the babies by FEV. While the codes are the same in some instances this

PRNevada New Member

PRNevada

Posted
Posted

Hello; New to the forum and found this thread when researching the P1488 code.  Bought the truck in Reno NV in May 2020.  Have not driven it much - now 3950 miles, mostly from long trips.   CEL came on September 27.  Took it to the dealer Oct. 7, and dealer found code P1488 and said that GM tells them to do a smoke test using tool GE-52250 (which the dealer does not have because GM has back ordered the tool for over a year).   The dealer then told me that the GM suggested fix is to replace the particulate sensor - which is out of stock and back ordered.  GM also asked the dealer to check that the sensor and the exhaust clamp are tight.  Mechanic found both to be tight.  Hopefully this is not the start of a long chain of problems as listed in other posts on this topic.

Pinnacle Enthusiast

Pinnacle

Posted
Posted
8 hours ago, PRNevada said:

Hello; New to the forum and found this thread when researching the P1488 code.  Bought the truck in Reno NV in May 2020.  Have not driven it much - now 3950 miles, mostly from long trips.   CEL came on September 27.  Took it to the dealer Oct. 7, and dealer found code P1488 and said that GM tells them to do a smoke test using tool GE-52250 (which the dealer does not have because GM has back ordered the tool for over a year).   The dealer then told me that the GM suggested fix is to replace the particulate sensor - which is out of stock and back ordered.  GM also asked the dealer to check that the sensor and the exhaust clamp are tight.  Mechanic found both to be tight.  Hopefully this is not the start of a long chain of problems as listed in other posts on this topic.

So the tool and the part are backorder lol how bad is this? How long you gonna drive with that cel? 

PRNevada New Member

PRNevada

Posted
Posted (edited)

Hi; Dealer cleared the CEL, I drove the truck 20 miles home and it did not come back on.  We will see how long it takes to re-light.  I don't notice any change in how the truck drives, and the dealer did not raise any concerns about continuing to drive the truck while the issue remains unresolved.

 

10/16/20 Update:  New Particulate Matter Sensor installed yesterday.  The problem is explained in GM Tech-Link if you search PIP5748A.  Hopefully the problem is resolved.

Edited by PRNevada
Updated Information
Steve-2019 Enthusiast

Steve-2019

Posted
Posted
On 9/6/2020 at 9:00 AM, RockyBlue said:

Yes that is the one.  I will be taking my truck to them next week to start the process.  30 days in the shop for them to try and fix.  Then start the buy back process.

So did they get it fixed or are you in the buy back process now?

  • 1 month later...
Serg76 New Member

Serg76

Posted
Posted

Any one has update on this topic i just got my truck 3 weeks about 1000 miles got code p1488 I took truck back to dealer 800 miles later got same code my truck been on dealer for 1 week this sucks

TheVez Enthusiast

TheVez

Posted
Posted (edited)
On 10/9/2020 at 9:38 AM, PRNevada said:

Hi; Dealer cleared the CEL, I drove the truck 20 miles home and it did not come back on.  We will see how long it takes to re-light.  I don't notice any change in how the truck drives, and the dealer did not raise any concerns about continuing to drive the truck while the issue remains unresolved.

 

10/16/20 Update:  New Particulate Matter Sensor installed yesterday.  The problem is explained in GM Tech-Link if you search PIP5748A.  Hopefully the problem is resolved.

So any luck?  I read this last night and got the code today. Read this, came out only 3 days before you updated. https://gm-techlink.com/?p=13781 Taking it in in the morning. It’s awesome how duct tape is mentioned. Jesus GM. 
 

edit to add: I just reread and the duct tape seems to be used to seal while using the sniffer for testing. 

Edited by TheVez
TheVez Enthusiast

TheVez

Posted
Posted

An update to the above. Dropped it at the dealer at 8am. New particulate sensor installed. First Oil change and picked up at 11:30am. I was prepared for a horrible experience but so far so good. 

yousaveone Enthusiast

yousaveone

Posted
Posted

People need to quit relating the other Duramax to ours. Their not even ALMOST the same. the big diesels are designed by Isuzu and the babies by FEV. While the codes are the same in some instances this does not cross over from big engines to ours. You have a warranty and you bought a great engine with an ok truck wrapped around it. I have 36K on mine now and it just runs better every day. I think break in is close to done, my oil analysis levels look great.

  • Like 1
KMK New Member

KMK

Posted
Posted

My truck was in at 4999 km, for the same problem. Said original particulate sensor wasn’t torqued from the factory. 750 km later, same code. Appt next Friday again. Pissing me off is all. I’m a passive guy, but nearly $70,000 on a new truck?  I’ll loose my ****** on them if this isn’t fixed this time!

Pinnacle Enthusiast

Pinnacle

Posted
Posted (edited)
20 hours ago, KMK said:

My truck was in at 4999 km, for the same problem. Said original particulate sensor wasn’t torqued from the factory. 750 km later, same code. Appt next Friday again. Pissing me off is all. I’m a passive guy, but nearly $70,000 on a new truck?  I’ll loose my ****** on them if this isn’t fixed this time!

 

Edited by Pinnacle
  • 4 weeks later...
nickchodge New Member

nickchodge

Posted
Posted

Same exact issue. Bought my Sierra AT4 in May. It has already been in the shop more than 30 days for this issue. Same thing with part not being available. Ultimately, the replaced the entire catalytic converter after going back and forth with Detroit. I requested replacement of the truck, but GMC would not do it on the same loan terms I have (0% interest). After reading this thread, I don't want a replacement now anyway. I am pursuing Lemon Law in Washington state and will request a buyback of the truck. GMC Customer Care and the dealership (George Gee, Spokane) were no help at all. Really a shame for the price.

  • 1 year later...
Monte King New Member

Monte King

Posted
Posted

I have a 2021 High Country, 3.0l turbo diesel.  At about 1000 miles, I got the dreaded CEL with a P1488 code.  My dealer when thru all the required attempts to fix it;  torque the particulate sensor, torque exhaust pipe clamp, add 'Tiger Tape' to the exhaust pipe joint, smoke test for exhaust leaks, replace the flex joint.....all to no avail. I was always skeptical about the exhaust leak theory.  After all, how could the truck know there was a small exhaust leak to atmosphere??  In total, my truck was at the dealer service 7 times with no resolution.  Each time they reset the code and the CEL always came back on within several hundred miles. I was finally able to get the regional service tech representative involved.  He instructed my dealer to replace the whole exhaust system, including the cat convertor.  Probably $2-3000 in parts.  That has solved the problem. 

 

Apparently there were some manufacturing variances with the exhaust pipe joint aft of the particulate sensor.  This allowed a small air leak 'INTO' the pipe between exhaust pulses which confused the emission controls. A small number of exhaust pipes with this slightly defective joint all showed up with this same problem.  I also had a particulate sensor that was occasionally sending bad data.  This was identified using a data collector on a 10 mile drive.

 

I've since discussed this issue with an engineer friend who specializes in engine emission certification.  He says the very first thing they do in preparing for a test run is pressure test the exhaust system and repair even the smallest leak.  Otherwise, they would never get a consistent result.  So, this rather implausible solution has some basis in science.

 

I've put about 10k miles on it since the fix and no CEL.  Yea!   I commend my dealer for sticking with me on this.  They were carefully following the various Tech Bulletins and instructions from Detroit and always accommodated my schedule and provided a loaner car when there weren't many available at the time.

ElevatedBabyDiesel21 New Member

ElevatedBabyDiesel21

Posted
Posted

Does anyone know if this was ever an official recall..or do all us 3L owners just have to wait, cross our fingers and hope we didn't receive one of the faulty exhaust systems? I just bought a '21 with 23K miles on it. Do they at least have a protocol in place now that allows for an expedient fix or do we have to go through all the B.S. multiple steps and then fight for a new exhaust setup? 

Monte King New Member

Monte King

Posted
Posted
On 10/10/2022 at 2:45 PM, ElevatedBabyDiesel21 said:

Does anyone know if this was ever an official recall..or do all us 3L owners just have to wait, cross our fingers and hope we didn't receive one of the faulty exhaust systems? I just bought a '21 with 23K miles on it. Do they at least have a protocol in place now that allows for an expedient fix or do we have to go through all the B.S. multiple steps and then fight for a new exhaust setup? 

I think this problem shows up early in the truck's life or not at all.  Hopefully, you'll be ok.

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

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Forum Statistics

    250.5k
    Total Topics
    2.7m
    Total Posts

  • Member Statistics

    342,894
    Total Members
    8,960
    Most Online
    TopBo
    Newest Member
    TopBo
    Joined

  • Who's Online   4 Members, 0 Anonymous, 1,185 Guests (See full list)

  • Latest Articles

  • Posts

    • 81mmcat
      Higher oil pressure after DFM shut off

      By 81mmcat · Posted

      Can anyone explain why the oil pressure runs higher after the DFM is shut off?  just installed the Pulsar Lt.
    • fm2176
      New to Me 2010 SLE (Quirks, Issues)

      By fm2176 · Posted

      Thanks!  I figured as such; GM and other manufacturers have used standard parts and harnesses across trim levels and such for decades.  I pulled the blank accessory cover off of my commuter van (a 2016 or so Chevy 15-passenger) years ago and found the plug for a USB outlet.  It wasn't connected to anything, though (I tried swapping in an outlet from another van).  I was a GM Tech years ago (late-90s) and was pretty familiar with my 2006.  I might be wrong, but I view newer vehicles (pretty much anything made in the past 20 years) as being a lot more plug and play.  Meaning, more unused wires and plugs unless you have the Mack Daddy of vehicles.    
    • Coastie05
      It's Been a Long Time...

      By Coastie05 · Posted

      Welcome back!
    • davester
      New to Me 2010 SLE (Quirks, Issues)

      By davester · Posted

      not all plugs will be used.  gm uses more generic harnesses that support most/all options, and if your truck doesn't have a specfiic option, the plug won't be used (commonly will have a dummy insert in the plug , or it'll be taped up, but some may just be left as is).  But it's sldo possible some p.o. has installed the wrong/cheaper parts that aren't correct for your vehicle...
    • fm2176
      New to Me 2010 SLE (Quirks, Issues)

      By fm2176 · Posted

      First off, I'm not trying to just get easy advice/fixes for the issues I've noticed so far.  I'll be combing through the site via searches and such, and if past experiences are any indication, should find what I need.  For the sake of conversation, though, I figured I'd post the handful of things I've noticed in the 12 hours since buying my 2010 SLE CCSB.     Indicator lights: Airbag and TPMS.  The tire pressures aren't reading for any of the wheels, so I'm pretty certain the sensors were either removed, are damaged, or are otherwise inoperable.  I used to mount and balance tires 25 years ago but am pretty much ignorant when it comes to TPMS.  My 2006 didn't have the sensors and this might be the fourth vehicle I've owned that does.     Radio: Rear speakers aren't working.  I removed the driver's side rear door panel and checked the speaker and wiring.  I also removed the sill and b-pillar covers to check the wiring.  A few minutes of Google Fu showed that this is potentially a head unit issue.    Switches: Power mirrors don't turn left/right.  I ordered replacement driver's door switches that should arrive tomorrow.  The windows and locks work but it was only about $20 for all of them.  The driver's side rear window switch lets the window down but won't put it back up.  I think the passenger rear doesn't work at all.  In the coming days/weeks, I'll break out my multimeter to check all of that.   Unknown wiring harness: There's a box attached to the front driver's side of the engine compartment, right where the second battery shelf is located.  There are three plugs, one of which looks like it fits a standard headlight-style bulb (9007 or similar).  It doesn't look like it's plugged into anything.  I'll do some digging and if I don't see anything elsewhere on the site, post some pictures here.   Unknown plugs on brake booster: There are at least two female plugs on the brake booster that aren't being used.  I think it might be a replacement/aftermarket, so maybe those are used for a different application, as there don't seem to be any unplugged harnesses and no indicator lights are on.   Little squeaks when turning: Sounds almost like a bushing around the bed of the truck.  I'll have to pay close attention as I get more familiar with the truck.   Clunk on acceleration: possibly the infamous drivetrain clunk.  My 2006 had it and I'm just not familiar enough with this truck yet to fully grasp what it is.   Anyway, my apologies for the vague and all over the place post.  This truck is new to me, and it's been four years since I drove my 2006.  With 200k miles, I know I'll need to learn this truck quickly to avoid having any major issues, despite being confident it's got much more life to it.  My 2006 had nearly 320k on it when I parked it (nearly 300k of which I put on the truck), and it was still drivable then, though I suspected the head gasket might have blown.  I'd hoped to have that truck back by now, but it's gone forever, as I detailed in my reintroduction thread.  

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...