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3.0L Duramax Diesel long crank issues continue to confound dealers, frustrate owners


We have thoroughly covered the known long crank/no crank issues on the 3.0-liter Duramax Diesel engine. And despite a production halt on the manufacturing of this engine, there is still no response from General Motors or a pending recall for this issue.

Though we recently did a video summarizing these issues, we now have more information provided by a frustrated owner.

Long crank/no crank issue for 3.0L Duramax Diesel engine

According to forums, message boards and YouTube, it seems the No. 1 culprit can be a bent or warped camshaft wheel. If the wheel isn’t making contact in all the right places, you may wait a while for the wheel to spin and make enough contact to turn over. Or the engine may not start at all. If this is the issue, you’re looking at a 40- to 50-hour job to lift and completely remove the truck cab to replace this part.

Recently, we were contacted by Ryan Nassar, an owner who has a truck with this engine.

“When I push the start button it cranks for about 15-20 seconds but doesn’t start,” he said. “Give it about 30 seconds, and it starts right up.”

Nassar can confirm what others have said, and according to his dealer this is a 50-hour job to fix.

“My dealer wants to bury their head because it’s a big job,” he said. “I noticed they have a freeze on the 3.0 Duramax currently. I’m sure if that’s why. It’s about a 50-hours-cab-off job apparently according to my dealer.”

Though Nassar (and a lot of us) assume the production halt on the engine is due to the long crank issue, GM hasn’t confirmed this is the case.

Replacing the wheel isn’t always the fix

Truck owners are reporting multiple culprits that have fixed the long crank issues on their 3.0-liter Duramax Diesel engines. These include, but aren’t limited to, a faulty wiring harness, updated ECU, camshaft position exciter wheel, fuse boxes needing to be torqued, faulty actuators and faulty fuel pumps. Of course, a lot of dealer mechanics are going to start with the simple things and move down the line, meaning your truck could be in and out of the dealership multiple times to troubleshoot and hopefully correct the problem.

More information on known issues with this engine can be found on the MyLemon.com website.

Bottom line on Duramax Diesel long crank issue

GM’s 3.0-liter I-6 turbo-diesel is the most fuel-efficient engine for the Silverado 1500. It has an EPA rating of 23 MPG in the city and 33 MPG on the highway in 2WD and 22 MPG in the city and 26 MPG on the highway in 4WD. It produces 277 horsepower and 460 pound-feet of torque. The fuel economy and combined towing power of the small Duramax is an advantage for GM. And, in fact, this engine is highly regarded and has won several awards.

However, there’s clearly an issue with multiple long crank/no crank issues being reported, and we are huge proponents of transparency. So, it would behoove GM to address this issue, despite the 50-hour fix time (which is pricey in a recall).

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Jimmy Dinsmore

Jimmy is News Editor for PickupTruckTalk with an expertise in new vehicles. He is also a Ford Mustang historian having authored the book Mustang by Design (available on Amazon). His second book, about the history of Ford's F-Series truck comes out next year.

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  1. Carlos February 26, 2022

    I have the same issue. 460 miles 26 hours hours. My 3.0L won’t start when it’s been off for a while. Going to take it to the dealership and see what they say. (2021 Silverado)

  2. Patrick March 25, 2022

    I’m having the same issue and have brought my Chevy Silverado 3.0 Duramax to my local Chevy dealer on two different occasions and a third scheduled for next week. I am starting to get frustrated because they seem to be clueless of this issue and according to them, “they haven’t heard of such a problem.” After reading this article and several others, as well as Youtube videos, it is quite clear that I’m not the only one having this problem. Does anyone know if there are any updates or recalls for this crank problem?

    1. Luiz Eduardo Bettega May 5, 2022

      I have the same engine on the escalade. they update the software and the problem reduced 99%. but still once a month a have the problem. I’m looking for lemon law options once they don’t know whatelse do to.

  3. Bob Jones May 8, 2022

    Is the 2022 Tahoe and Yukon suffering from this long crank or no crank issue or mostly 2021 and prior?

  4. Tom June 11, 2022

    Same problem, a year ago at roughly 10K now it has roughly 20K miles, and same no start issue, Silverado 1500 4×4, w-3.0 Duramax. Dealership fixed it once and I thought I was good to go. Now it just started happening again.

  5. Ray Larson June 14, 2022

    Same issue today. 2021 Silverado with 14000 miles. A few weeks ago rough start then died. Seconds later perfect start. Today, cranked for at least 20 seconds without starting then stopped cranking. Seconds later, perfect start. Putting this on thread to help document. Hopefully something comes of it before warranty expires

    1. Brandi s October 3, 2022

      2021 with 14,500 miles and did exactly same this weekend. I got it into driveway and it would eventually start and die, start and die! I had it towed to dealer. They said nothing came up but a minor code even tho my engine light was on and of course it started up fine for them!

  6. Stéphane Desbiens October 1, 2022

    I’ve got a 21 with the 3.0. I spoke to the dealer about the long crank no start. They did a icu reprogramming last week. Now it cranks like 7-10 seconds on every start . Did they fix the problem …. Now I will need a starter in no time cause of the over cranking on every start. They should have left it has is with the long crank no start issues. Going back this week and will see what they say.

  7. Dan Holman November 6, 2022

    I have a 22 Suburban diesel and it happened today. Had to have it towed to the dealer. Lemon laws surely need to be in place. So frustrating started with speedometer going completely black while driving a month ago.

  8. Bubba Burns January 1, 2023

    Have a 2021 Silverado 3.0 32K miles. Stopped at at a Stop Sign November 28th it Died would not Start. Had it Towed to Bull Chevrolet in Wynne Ar. They have no idea when it will be Repaired. Past ten years I have had three Silverado Trucks with 5.3 engines, no problems. So frustrated Chevrolet knows there is ISSUES with the 3.0 Diesel STEP UP make things Right.

  9. John Guntle January 19, 2023

    I have a 2021 Chevy Silverado 1500 with the LM2 3.0 desiel. My engine light keeps coming on been to the dealer something about left bank emissions low . Reset the light keeps coming on now my truck wouldn’t start light is on again. I jumped the battery it started. When I got off work it was dead again. I jumped started it again it started. I have a appointment in the morning to the dealer to see what is wrong now..


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