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Old 01-04-2010, 12:18 PM   #1
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engine misfire code - P0300

well I am sitting at the dealer for about two more hours while they do a compression check on the head. Truck is a 2005 and went through the 36000 mile warranty a long time ago. Did some research and found out that's it's up to 100000 for this problem. I am currently at 100274. I really hope they can fix it. Any other ideas in case this doesn't work out in my favor?
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Old 01-04-2010, 12:24 PM   #2
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Re: engine misfire code - P0300

If the dealer tells you they wont cover it....you have one more chance to plead your case with gm. Call them gm help line and tell them about it. Its close enough that they should fix it.
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Old 01-04-2010, 12:35 PM   #3
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Re: engine misfire code - P0300

thanks dave
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Old 01-04-2010, 12:39 PM   #4
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Re: engine misfire code - P0300

the 05 I just got has had a miss fire code 2 times and cleared its self both times on cylinder # 5
and the dealer did not tell me any remedies to fix they just said the code had cleared itself and bring it back if it happens again what do you guys think I should do

also sorry to jack just thought sense we were having similar problems I would just post here instead of making 2 threads about almost the same thing
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Old 01-04-2010, 03:05 PM   #5
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Re: engine misfire code - P0300

Hopefully they don't give you grief over 274 miles, good luck. My dealer wanted to charge me $2800 to replace the head until I printed off the recall letter and took it into them.
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Old 01-04-2010, 03:11 PM   #6
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Re: engine misfire code - P0300

They ran the test and found nothing. They also said if the CEL comes back on, take it to them. It was on when I left this morning and to my luck, it disappeared before I got to the dealer. It only happens when there is moisture around like rain, snow, or even after a car wash. I need to check the boots and make sure water isnt get in that way. Its just so freaking cold outside... 15 degs currently
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Old 01-04-2010, 08:17 PM   #7
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Re: engine misfire code - P0300

Check your plugs, and the boots. But generally the P0300 code is a precursor to needing the head job. Good thing you went in now. At least you can establish a trail.
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Old 01-04-2010, 08:38 PM   #8
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Re: engine misfire code - P0300

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But generally the P0300 code is a precursor to needing the head job.
My brain throws this code all the time
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Old 01-04-2010, 10:28 PM   #9
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Re: engine misfire code - P0300

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Originally Posted by volsfan4life View Post
They ran the test and found nothing. They also said if the CEL comes back on, take it to them. It was on when I left this morning and to my luck, it disappeared before I got to the dealer. It only happens when there is moisture around like rain, snow, or even after a car wash. I need to check the boots and make sure water isnt get in that way. Its just so freaking cold outside... 15 degs currently
If the CEL lights up, the code stores in memory (but light may have shut off)... FYI
Sounds like that shop is not really doing much trouble shooting, unfortunately.
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Old 01-05-2010, 07:43 PM   #10
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Re: engine misfire code - P0300

yeah it went off after I left the dealership. I left work today and its on so I drive my happy ass to the dealer and park it in their garage with the truck left on and dragged a guy to see that the light was on. Needless to say, they saw two misfires in Cylinder 2 and 5. They are going to the reps tomorrow to determine if I am able to get it fixed. I think so. I hope they tell me good news tomorrow.
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Old 01-06-2010, 12:14 AM   #11
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Re: engine misfire code - P0300

Finally.. Good luck with the repair.
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Old 01-06-2010, 09:39 AM   #12
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Re: engine misfire code - P0300

let me know what happens with that i have a misfire on 5 as well. But its only happening when the truck is warm. The thing is my dealership just closed down a few months back so im wondering about warranty issues.
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Old 01-06-2010, 04:57 PM   #13
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Re: engine misfire code - P0300

well its good up to 100,000 miles. If you have a 06-up, your warranty automatically is 100,000.
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Old 01-06-2010, 08:08 PM   #14
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Re: engine misfire code - P0300

Any Chevy dealer can perform warranty repairs.
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Old 01-07-2010, 09:51 AM   #15
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Re: engine misfire code - P0300

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well its good up to 100,000 miles. If you have a 06-up, your warranty automatically is 100,000.
07 and up. I bought a leftover 06 in 07 and got the shaft.
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Old 01-07-2010, 04:53 PM   #16
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Re: engine misfire code - P0300

Well fuck. The local dealership said they "called" the gm rep and they wanted to offer me one of two things. He said that GM wont be any lenient since I am 200 miles over 100,000 limit. That pisses me off. He said I could trade the truck in on a new one and they will give me 1500 extra plus the cost of the trade in, or he said that GM will split the cost of the repair 50/50. You would think that if they want a good reputation, they would give a break here and there. I am getting a ballpark figure currently since they are blowing smoke up my ass.
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Old 01-07-2010, 04:57 PM   #17
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Re: engine misfire code - P0300

these days i'd be expecting that. i'd take the trade in if i were you.
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Old 01-07-2010, 05:10 PM   #18
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Re: engine misfire code - P0300

I would like to but the truck is paid off and has been since last february. I am going to try alternate measures
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Old 01-09-2010, 12:37 AM   #19
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Re: engine misfire code - P0300

I just got my truck back today from the P0300 code. My light came on 2x times last week then went off. Of course when I brought it to the dealer the light was off, but I told them I got the code read from another local shop. They ran it and the same code. I took it in on 30 Dec and got it back this afternoon. I have 55K on my 05. It ran good when I brought it in. I havent driven it yet, because my wife picked it up. Glad it was under warranty
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Old 01-09-2010, 06:53 PM   #20
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Re: engine misfire code - P0300

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these days i'd be expecting that. i'd take the trade in if i were you.
Agreed. Already have 100K miles. Get a new truck and new warranty.
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