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2022 silverado 2500hd 6.6l gas excessive cranking to start

Dan Lawson
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Dan Lawson Enthusiast

Dan Lawson

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I have a 22 LT 6.6l gas with 2500 miles took it to the dealership because it seems to excessively crank in the morning 3-4 seconds until start otherwise fires right off during the day,tested battery at my house showed low voltage dealership had it 2 days couldn't say it was the module keeping bcm awake but blamed my dash camera I've keep it unplugged so not to drain battery and back from the dealership still excessively cranks,I'm thinking bad battery but am going to take it to another dealership since I have lost faith and the actual diagnostic test they did at the dealership I brought it to first,just seeing if anyone else has had an issue of battery drain overnight or excessive cranking 

Dan Lawson Enthusiast

Dan Lawson

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1 hour ago, Crazy Canuck said:

Did they or you load test the battery?  May be a good check.

I have no idea,they never gave me paperwork,I truly believe the battery is bad,I'm going to schedule it at another dealership after I test it at our shop. 

I gave this smaller chevy dealership a try but was very unsatisfied with the attempt or care they showed 

2020_3500HD Enthusiast

2020_3500HD

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If the outside temp is cold (can’t remember the exact cut off) the gm di motors will have an extended crank time.  I experienced this on my previous truck 2015 half ton and my 2020 6.6 truck does the same.  Has to do with making sure proper fuel pressure is built up before firing the injectors.  Hope this helps.

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Dan Lawson Enthusiast

Dan Lawson

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17 hours ago, 2020_3500HD said:

If the outside temp is cold (can’t remember the exact cut off) the gm di motors will have an extended crank time.  I experienced this on my previous truck 2015 half ton and my 2020 6.6 truck does the same.  Has to do with making sure proper fuel pressure is built up before firing the injectors.  Hope this helps.

Well thats when it does it the most under 40 degrees 

Another JR Senior Enthusiast

Another JR

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17 hours ago, 2020_3500HD said:

If the outside temp is cold (can’t remember the exact cut off) the gm di motors will have an extended crank time.  I experienced this on my previous truck 2015 half ton and my 2020 6.6 truck does the same.  Has to do with making sure proper fuel pressure is built up before firing the injectors.  Hope this helps.


I did not experience extended cranking during a recent cold stretch here in the mid 20s F (that counts as very cold here in the Seattle area).  So the threshold must be lower than that. 

2020_3500HD Enthusiast

2020_3500HD

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Posted

I found and attached the tsb from when I had my 2015 truck.  It has a chart showing approx crank times associated with different temps.

5B80DF00-60F2-4EBE-BB23-8ACB514911FA.png

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  • 1 year later...
GP9 Enthusiast

GP9

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On 3/2/2022 at 3:38 AM, 2020_3500HD said:

If the outside temp is cold (can’t remember the exact cut off) the gm di motors will have an extended crank time.  I experienced this on my previous truck 2015 half ton and my 2020 6.6 truck does the same.  Has to do with making sure proper fuel pressure is built up before firing the injectors.  Hope this helps.

I’ve got a 2022 3500 and it does the same thing. The crank is slightly extended for a cold start in low temps. It seems to cold start with normal cranking when the weather is warm.

Jettech1 Senior Enthusiast

Jettech1

Posted
Posted

We actually had 10' weather here in Atlanta during this past Christmas.  Truck started almost instantly.  Never a long cranking at all...Not a difference between 95' and 10'.  That definitely points towards a bad battery with a bad cell in it.  Sometimes load testers are not spot on.  You need the volts to push out the amps.  Those load testers don't always tell the whole truth.  A new battery will probably solve all your problems.

  • 1 year later...
colts New Member

colts

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Dan,

 

Did you ever find the root cause of the excessive cranking? My 22 LT is doing the same… 

Ben Jardine Enthusiast

Ben Jardine

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I never herd of this . I start my truck in -30 all time 2024 l8t gasser i live in canada and i dont plug my truck in . Coldest i started it was -35 

Ben Jardine Enthusiast

Ben Jardine

Posted
Posted
On 3/2/2022 at 4:38 AM, 2020_3500HD said:

If the outside temp is cold (can’t remember the exact cut off) the gm di motors will have an extended crank time.  I experienced this on my previous truck 2015 half ton and my 2020 6.6 truck does the same.  Has to do with making sure proper fuel pressure is built up before firing the injectors.  Hope this helps.

I never herd of this . I start my truck in -30 all time 2024 l8t gasser i live in canada and i dont plug my truck in . Coldest i started it was -35 

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