3.0 Duramax cranks but won’t start

[Jim Kucharas]

Mine is doing the same thing it is very frustrating. The dealer acts like they never heard of this happening. 

[Frankhpns]

This is a second TSB regards the camshaft timing sensor. The first which was previously for the replacement of the reluctor wheel, which involved extensive work to complete. This new one dated Aug 16 is to have a .5in or 5mm shim installed behind the sensor itself. It appears to be the fix for those of us who developed the same long crank/no start problem after the camshaft sensor reluctor wheel was replaced the first time. img20210827_08272025.pdf

 

Edited August 29, 2021 by Frankhpns

[losky79]

GM has just stopped production of the 3.0 Duramax. They say it’s due to a supplier shortage. I call BS, they stopped production to figure out what’s going on with these engines.

 

https://tfltruck.com/2021/08/breaking-news-gm-is-stopping-production-of-the-3-0-liter-duramax-diesel-i6-engine-due-to-a-sudden-supplier-shortage/

Edited August 29, 2021 by losky79
Spelling correction

[WontStart]

[Ronald Olson]

Same problem 2021 Silverado Duramax 3.0 happened 3 times to me around 600 ,1000, 1500 miles on truck. I thought just me truck good to know not just my truck. will be checking with dealer

[WontStart]

I have faith GM will make it right. These trucks are still awesome

[ColoradoCub]

Well the newest TSB for the crank no start by adding a shim doesn’t fix the problem either. Man GM is useless.

[Booger T]

4 hours ago, WontStart said:

That's what I'm doing  I have an early build 20 with 26K and no problems of any kind. I believe most trucks with this problem are 21's and a very few late built 20's.

[DVR]

https://www.motor1.com/news/529513/gm-stops-selling-duramax-diesel/  

[WontStart]

1 hour ago, Booger T said:

That's what I'm doing  I have an early build 20 with 26K and no problems of any kind. I believe most trucks with this problem are 21's and a very few late built 20's.

I’ve noticed that too. I can’t believe GM hasn’t been able to figure out what has changed between then and now that could cause the issue. 

[latreille89]

6 hours ago, ColoradoCub said:

Well the newest TSB for the crank no start by adding a shim doesn’t fix the problem either. Man GM is useless.

Did you have this done and it still just cranked over?

[ColoradoCub]

14 hours ago, latreille89 said:

Did you have this done and it still just cranked over?

I have not but an owner on one of the Facebook pages had it done a week ago and had another crank no start on Friday. I haven’t allowed them to use me as a guinea pig for any of these repairs that haven’t worked.

Edited August 30, 2021 by ColoradoCub

[singlespeed]

22 minutes ago, ColoradoCub said:

I have not but an owner on one of the Facebook pages had it done a week ago and had another crank no start on Friday. I haven’t allowed them to use me as a guinea pig for any of these repairs that haven’t worked.

Yeah I don’t understand why a cam sensor, trigger wheel and a shim would fix a intermittent problem.  Pretty ridiculous they can’t find the true problem.

[macodi]

Has anyone ever had the truck fail to eventually start after one or several of the long crank/no start issues? In other words it never started and you had to have it towed?

[Greenman27]

Just updating everyone on the crank no start issue on my 21 Silverado.  It has happened 3 times so far 1500 mi 4800 mi and 6070 miles.  It has always been with a warm engine.  it always starts second try perfect.