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2015 Tahoe is hard to start when engine is cold

yogi11

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The Zip Senior Enthusiast

The Zip

Posted
Posted

fondupot - based just on your comment and not factoring in outside temps or some other underlying issue, longer crank times can't be normal. My truck cranks within a couple of seconds of the starter being engaged (versus yogi11 7-10 seconds). But if what you say is correct, I have an abnormal cranking truck.

  • 2 weeks later...
yogi11 Enthusiast

yogi11

Posted
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Posted

Here is another update on my problem. The scanned code on the Tahoe was "P00C6" which is fuel rail pressure to low. The dealer had my vehicle for 10 days to replace the camshaft position actuator solenoid valve and then called me to say it was fixed. The following day after getting it home the Tahoe is having a hard time starting just like before and it was that way for the next three days and then I get the service engine alarm on my dash again. I'm now taking it to a different dealer to see if they can fix this problem.

yogi11 Enthusiast

yogi11

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New update: The new dealer told me they got the same scanned code as before and that they think it is a bad fuel pump which they have ordered. Now its parked at the dealer waiting for parts again. So far this vehicle with only 1100 miles on it has been sitting at a dealer waiting to get fixed for more than 13 days.

310racing Enthusiast

310racing

Posted
Posted

Parts changers, throw them parts till we change something for the better, and pretend that change is equal to the bounty at the end of a rainbow......

 

Interesting statistic that's not scientific, 1 out of every 100 stealership parts changers is actually a mechanic.

 

If you are on here and work at a stealership and offended, thankfully you are likely the only "1" in your shop.

I hate dealing with service depts and there typical lies, and ignorance. Off the box

redwngr Senior Enthusiast

redwngr

Posted
Posted

the longer crank times are because of the direct injection. its normal.

But not 7 -10 seconds, unless it is extremely cold (like below -30F)

 

 

Direct Injection engines may have slightly longer cold crank times than that of port fuel injected engines. Direct Injection systems run at higher pressures and the mechanical pump on the engine must build up the required pressure before the first injection event occurs.

 

Following are typical DI engine crank times using gasoline:

 

Screen-Shot-2014-02-20-at-11.22.51-AM.pn

 

For ethanol fuel, see #PIP5174: Extended Engine Crank Times When Using E85

yogi11 Enthusiast

yogi11

Posted
  • Author
Posted

Another update: The dealer put in the new fuel pump and that did not fix the problem. They are going to call GM for help on what to do next. So far this vehicle has been sitting at dealers for 17 days now while they try and fix it.

yogi11 Enthusiast

yogi11

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Hopefully this is my last update: The dealers next try was to put in a high pressure fuel pump that is located under the intake manifold. After they pulled the manifold they found that #4 fuel injector was leaking so they replaced that. I picked up the vehicle yesterday and now we will see if this fixed the problem. This vehicle was sitting at two different dealers for a total of 20 days while they kept guessing and throwing parts at it.

I do understand that you can get a new vehicle and have a problem which I accept. But when you bring it to a dealer you expect an accurate diagnosis and a timely repair which I did not get.

austingta Enthusiast

austingta

Posted
Posted

I had an 08 GMC which kept throwing a random misfire code. Like yours, it was in the dealer forever, time and time again. They kept trying cheap fixes here and there. I always had a nice loaner so I was patient.

 

Finally they replaced all my pistons and rings. That fixed it...crazy.

  • 4 weeks later...
MattUofM Enthusiast

MattUofM

Posted
Posted

the longer crank times are because of the direct injection. its normal.

 

exactly what he said. its is normal for a DI engine

yogi11 Enthusiast

yogi11

Posted
  • Author
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7-10 seconds cranking time is not normal and replacing the bad fuel injector fixed the problem. Now the Tahoe starts in about 2 seconds like it should.

  • 6 months later...
jasonguidi New Member

jasonguidi

Posted
Posted

Hello All,

 

Took my 2015 Tahoe in today for this same issue. Service manager states there is a TSB for this concern. I will let you know what work was completed to resolve and if it worked.

 

 

  • 4 years later...
BigGuyGeorge New Member

BigGuyGeorge

Posted
Posted

I am not happy that my 2020 Tahoe with 1326 miles will not start the first time. There is no reason for this, warranty or not! you don’t market a vehicle that is not reliable or safe to be on the road. Extremely upset about this and will filing a formal complaint. The truck is basically a lemon

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