Won't start ?

KZ3 · November 23, 2020

Update on my 2020 trailboss I bought 5 months ago. Failed to start right after I bought it and they replaced the fuel pump module. It now happened again 5 months later. The first time 275 miles on it and now 13000 on it.

1035Z71 · November 24, 2020

I am so glad I found this thread and so disappointed that so many people are having the same issue. I have a 2020 Silverado LT Z71. The third day after purchasing the truck it wouldn’t start, all the same symptoms as everyone else. I was told it was the fuel control module. The dealer picked my truck up, replaced it and it drove fine for about 3 months. Then it wouldn’t start again. Dealer had it for a week and couldn’t find the issue. I was able to take videos that showed low voltage and check engine lights although they weren’t on at the dealer. They gave me the truck back and about a week later it didn’t start again. They had my truck for about 2 weeks and finally said they received the ecm bulletin. They replaced it and today after getting gas the truck took a while to start, but did not crank like the usual problems. So I began looking around and found this forum. I am expecting another issue soon. I have filed cases each time with GM since the first problem and am currently dealing with them now, they have no answers and so far I do not have high hopes. I will be following this thread to see what others report back with.

Edited November 24, 2020 by 1035Z71

KZ3 · November 24, 2020

They are replacing the ECM in mine now.

Rob Mugs · November 24, 2020

7 minutes ago, KZ3 said:

They are replacing the ECM in mine now.

Interesting.....

I read several pages here and it seems mine was the same as the OP's. I had JUST washed the truck that day and the GM floor mat was nudging the gas pedal just enough to cause a crank/no start condition

Chris Dubois · November 26, 2020

My dealer is saying the problem may be the aftermarket dealer installed alarm.....Karr security system.

Budspickup · November 29, 2020

Seeing a pattern here. Same issue with my 2020 6.2l wit 4,700 miles. After sitting for 1/2 hour it finally started and I drove it straight to the dealer. (then walked 5 miles home; vallet service cancelled because of Covid) Check engine light came on. Will report the outcome.

Interesting note after reading these posts. The fuel pump always activated when I opened the drivers door in the morning. It didn't do that this time. Always wondered what was going on. Figured it pressurized the fuel.

Chris Dubois · November 29, 2020

On 11/26/2020 at 6:46 AM, Chris Dubois said:

My dealer is saying the problem may be the aftermarket dealer installed alarm.....Karr security system.

They removed the alarm, 3 stops later it did it again... it will be back in on Monday.

Budspickup · December 1, 2020

November 2020, GM posted a service bulletin for this; PIP 57335F. The fix is to replace the ECM (Electronic Control Module), so that is what they are going to do. Will let you all know how effective it is.

Chris Dubois · December 1, 2020

33 minutes ago, Budspickup said:

November 2020, GM posted a service bulletin for this; PIP 57335F. The fix is to replace the ECM (Electronic Control Module), so that is what they are going to do. Will let you all know how effective it is.

Has anyone had the ECM replaced? Did it solve the problem?

tystaples · December 1, 2020

4 minutes ago, Chris Dubois said:

Has anyone had the ECM replaced? Did it solve the problem?

In June they replaced my ECM and fuel sender when this was an emerging issue. It worked for me. No issues so far!

Chris Dubois · December 1, 2020

1 hour ago, tystaples said:

In June they replaced my ECM and fuel sender when this was an emerging issue. It worked for me. No issues so far!

I don’t think the 3.0 is listed on that bulletin, but I’ll push for it. Thanks for the info!

steve841 · December 2, 2020

On 11/30/2020 at 8:32 PM, Budspickup said:

November 2020, GM posted a service bulletin for this; PIP 57335F. The fix is to replace the ECM (Electronic Control Module), so that is what they are going to do. Will let you all know how effective it is.

Happen to have any more specific info on this service bulletin?

Duramaxsky · December 2, 2020

Welcome to more goodies in vehicles = more problems. Sorry you have to deal with it, but yes, all these newer modern vehicles are not meant to be occasional grocery getters and no other use. I'd recommend having a battery tender installed. Plug it in at home, unplug when you need it 5 days later, and so on. Also invest in a good jump pack.

I have a Corvette. It sits all winter and is only a toy for occasional use. Yes it sits long enough to need a battery tender. But if it sits a week or 2 it doesn't need it. It has all the same goodies on it. It always starts. Not being a daily driver on a modern loaded vehicle is not the problem.

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Colossus · December 2, 2020

52 minutes ago, Duramaxsky said:

I have a Corvette. It sits all winter and is only a toy for occasional use. Yes it sits long enough to need a battery tender. But if it sits a week or 2 it doesn't need it. It has all the same goodies on it. It always starts. Not being a daily driver on a modern loaded vehicle is not the problem.

Sent from my shitty SM-A505U using ******-a-talk

Sure it is... Don't believe me? GO visit the other manufacturer forums. Having the same issues. Too many goodies and computers being run even when the vehicle is off.

Budspickup · December 2, 2020

Sitting and draining the battery is a different issue. This is identified as “cranks but doesn’t start” and that’s the title of the bulletin. Plenty of power in the battery but it is as if it isn’t getting fuel. In regard to the occasionally driven cars, even the factory alarm and those other goodies will drain the battery in time.