Highest miles so far on the 3.0L Diesel?

[Velislide]

Curious what's out there for the highest miles on the 3.0L. I have a 2020, that's at 63k now. Love this drivetrain. Only complaint is the fuel knock that's intermittent, not sure why it does that. 

[Anon12345]

Whens the last time you changed your fuel filter? Is your high pressure fuel pump making any odd noises?

[Dirk13]

Are you talking about the clattering at 1500-2000 rpm under light acceleration at low speed? If so seems to be pretty common. Some comments out there that it may be related to fuel quality. Maybe try an additive. 
 

Anyhow, there are more than a few trucks on autotrader with 90k+. Search Silverado 1500 with diesel fuel type and set the distance to Any, sort by highest mileage first. 
 

 

[jlong1984]

$58k for a pre-refresh half-ton High Country with almost 100,000 miles on it. Will this madness ever end?!? 

[Anon12345]

2 hours ago, jlong1984 said:

$58k for a pre-refresh half-ton High Country with almost 100,000 miles on it. Will this madness ever end?!? 

Right?! The used market is awful right now.  The entire market is awful.  We all know who to thank for the economy turning to ******. 

[seamus2154]

On 3/27/2022 at 6:56 AM, Dirk13 said:

Are you talking about the clattering at 1500-2000 rpm under light acceleration at low speed? If so seems to be pretty common. Some comments out there that it may be related to fuel quality. Maybe try an additive. 
 

Anyhow, there are more than a few trucks on autotrader with 90k+. Search Silverado 1500 with diesel fuel type and set the distance to Any, sort by highest mileage first. 
 

 

This is great info. I saw many trucks on there up to 100K. Great to see for this 3.0. Its really a winner. Any big issues would be out there with those miles. Lets face it, most people come to a forum for research or to complain about their issue. Not to say how great their truck is and that it has no problems. If I lost my truck tomorrow, I would ONLY consider the 3.0. It has been fantastic.

[TNTSierra]

On 3/27/2022 at 10:07 AM, jlong1984 said:

$58k for a pre-refresh half-ton High Country with almost 100,000 miles on it. Will this madness ever end?!? 

It’s going to end! And end HARD!!!  All I can say is: better have some money put away because a recession is coming!  
 

[3.0L_Johnny]

On 3/26/2022 at 7:11 PM, Velislide said:

Curious what's out there for the highest miles on the 3.0L. I have a 2020, that's at 63k now. Love this drivetrain. Only complaint is the fuel knock that's intermittent, not sure why it does that. 

It's a different fuel map for when the truck is doing an active regen. You're hearing injector noise, it's not anything to do with any of the other moving parts. To be honest, it's my #1 complaint about an otherwise awesome engine. Regens happen way too often, probably because the DPF is small and either GM didn't want to pony up for a bigger one, or there were packaging considerations since the DPF is under the hood.

[4banger]

My neighbor got the new 3.0 (gmc/at4) a little before I got my 2.7 ho and hauls light gear (maybe few thousand lbs) to remote field for work so wanted high economy/longevity, so has about double miles I do, maybe 25,000 (40,000 kms) and has gone limp mode 4 times due to emissions stuff, he's pretty choked. Major car guy, two built mustangs, built bmw m40, lifts in his garage, couple trucks, motorbike also and works on all himself. Having said that...any of you gone into limp mode? If so how many times in your mileage?

Edited December 12, 2022 by 4banger

[Dirk13]

19 hours ago, 4banger said:

My neighbor got the new 3.0 (gmc/at4) a little before I got my 2.7 ho and hauls light gear (maybe few thousand lbs) to remote field for work so wanted high economy/longevity, so has about double miles I do, maybe 25,000 (40,000 kms) and has gone limp mode 4 times due to emissions stuff, he's pretty choked. Major car guy, two built mustangs, built bmw m40, lifts in his garage, couple trucks, motorbike also and works on all himself. Having said that...any of you gone into limp mode? If so how many times in your mileage?

Never. Not at all common on the 3.0 and certainly not repeatedly after whatever the issue is gets fixed. It’s not something that just happens on a fluke because the emissions system feels like causing an issue that day.

 

What’s the issue causing the “limp mode”? What codes is he getting? What does the dealer say or what have they replaced so far?

Edited December 13, 2022 by Dirk13

[4banger]

I have to catch him and get those answers for ya, I'm watching for him. Was curious if this was a pattern able thing with the gm diesels and how many a guy may have to live with per x amount of miles. His work partner has an older eco-diesel he was able to delete and no issues, gets better mileage also, they figure due to the better aero on brick front gm's and trailboss at4 lift/tires. They both do the same mileage to these remote sites empty or with the light trailer.

[Ronjon]

On 12/12/2022 at 12:47 PM, 4banger said:

My neighbor got the new 3.0 (gmc/at4) a little before I got my 2.7 ho and hauls light gear (maybe few thousand lbs) to remote field for work so wanted high economy/longevity, so has about double miles I do, maybe 25,000 (40,000 kms) and has gone limp mode 4 times due to emissions stuff, he's pretty choked. Major car guy, two built mustangs, built bmw m40, lifts in his garage, couple trucks, motorbike also and works on all himself. Having said that...any of you gone into limp mode? If so how many times in your mileage?

Sounds like Canada needs to hurry up and finish a delete and tune.

[Traction]

34k on my 2020, no limp mode or performance issues to speak of. I do, however, keep myself aware of silt levels and burn off cycles using an iDash.

[John F.]

46k on a 22' LTD  . No issues at all. Wish there was an indicator for when it was in regen. (besides buying something like idash) 

Edited December 19, 2022 by John F.

[4banger]

On 12/13/2022 at 5:34 AM, Dirk13 said:

Never. Not at all common on the 3.0 and certainly not repeatedly after whatever the issue is gets fixed. It’s not something that just happens on a fluke because the emissions system feels like causing an issue that day.

 

What’s the issue causing the “limp mode”? What codes is he getting? What does the dealer say or what have they replaced so far?

Caught him, says def injector, replaced each time.