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monkey44's avatar
monkey44
Nomad II
Mar 18, 2014

New Chevy - hard to start.

Bought this new 2500HD 6.0L gas a month ago. About a week after taking it home, we began having difficulty starting it.

Rolls over a few times, coughs a bit, rolls again, and starts. Feels like a fuel issue. Either no fuel and no ignition, or no spark and a bit of flooding before the spark fires -- that cough makes me think now it might be flooding - where at first I thought moisture as it does it more in wet/chill days, or high humidity. Not positive of any of this as it's only got 2000 miles on it. Does no do it every time - more like occasionally.

We're traveling from Florida to California hauling the TC ... we're in San Antonio and it's at the Chevy dealer. Of course, won't do it now, as it's pretty sporadic. Chevy dealer says, "no code, so we don't know."

First, just because there is "no code" doesn't mean there is no problem. SO, what happens when these 'code mechanics' actually need to trouble-shoot? Well, I have no clue, but spending $40K plus on our new trucks that won't start correctly and the "code reader" says everything is hunky-dory ain't gonna cut it for long.

The dealer gives me a loaner -- and it rolled and coughed before it would start too. Very weird situation, 2000 miles from home with this issue. Bummer ...

Gotta say tho, aside from this issue, truck runs great after it starts - and hauls like it should. Good on the back-roads and the highways. Just purrs right along ...

But it concerns me a lot that it starts hard - and in fact, I drove about six trucks before I found one that 'sounded right' to my ear.
And several had acceleration issues during the "test drive" ... and this one did not - at least not perceivable at the beginning.

SO, any of you all driving this 2015 truck (or the 2014) gasser that's giving you this 'start' problem? And did anyone find out why?

Will take it to the next GM level if the dealer has no answer beyond the "no code" statement. It's not a huge issue yet, as it always rolls over and eventually starts - but it could be and it certainly needs attention. We're heading into the western national parks, and that is definitely not a good place to have 'truck trouble'...

48 Replies

  • Let the dealer figure it out. THat's what warranties are for. Were all just a bunch of keyboard mechanics here speculating...
  • Is this only on the first start of the day or can it be anytime?
  • Should'a bought a Ford, then you wouldn't have THIS problem :B
    Just kidding.... Seeing as how you had others that do it, then maybe this is Chevy's new standard "starting sound"?? I'd say as long as it is starting every time then don't worry about it. The environment around you is probably playing a role in causing this also( like you had said cold and damp )

    Good luck with the new truck!
  • Have to say you will need to live with it until you get back to your home dealer, unless you can get it to act up when they are right there. Is it doing it only on the first start of the day? If so leave it over night and go back in the morning. Have the service manager and mechanic at the vehicle with their scan tool plugged in to see if it will act up.

    We had a guy at the plant going through the same thing and the dealership hooked the scanner to the vehicle and told him to come back after it acted up. The scan tool can capture the condition and show them what is going on. This maybe the only way to get it repaired.

    Don
  • I would start with the very basics... Are the battery terminals tight? Have they been cleaned? Even a new truck has probably sat for a couple months at some point, and that is all that is needed for some corrosion or oxidation within those side-termals.

    Low voltage during cranking can cause the PCM to drop out, which causes it to not fire-off, and it won't store codes because it doesn't know anything is wrong since it is shutting off.
  • enblethen wrote:
    Turn the key to "ON" listen for a click within about 3-5 seconds. No click could mean that the fuel pump relay is not activating to pressurize the system for starting.


    The new GMs don't do this. Instead of being a having a fuel return and pressure regulator to dump the excess fuel, the new GMs use a variable-flow fuel which is Pulse-Width modulated by the PCM. It only needs a fraction of a second to build pressure, and immediately slows to maintain that pressure.
  • Turn the key to "ON" listen for a click within about 3-5 seconds. No click could mean that the fuel pump relay is not activating to pressurize the system for starting.