Truck will not start from time to time - Chevy Colorado & GMC Canyon
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post #1 of 34 (permalink) Old 07-25-2008, 01:34 PM Thread Starter
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Truck will not start from time to time

I have an 06 colorado Z-71 crewcab 4x4. Every once in a while (maybe 3 to 5 months) My truck will not start.It will crank and turn over just fine.But will not start as if its not getting any fuel.Had it at a local chevy dealership could not find any problem with it. When you leave it set for about 10 minutes or so and try it again it will start and be fine for several months before it happens again. Any one every had this problem or heard of anything like this??
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post #2 of 34 (permalink) Old 07-25-2008, 02:55 PM
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Re: Truck will not start from time to time

Sounds like something is triggering the Passlok system to activate.


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post #3 of 34 (permalink) Old 07-25-2008, 08:36 PM
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Re: Truck will not start from time to time

I believe DB is correct. Next time the problem occurs, check the dash for a flashing Passlock icon.

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post #4 of 34 (permalink) Old 07-26-2008, 10:33 AM
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Re: Truck will not start from time to time

Check the battery voltage.

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post #5 of 34 (permalink) Old 07-29-2008, 11:26 AM Thread Starter
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Re: Truck will not start from time to time

Thanks guys it just did it this morning and I checked on here and read your posts. When I went to check that it did start but that does make sense. Normally if you wait about 10 minyes or so it will start with no problem.Next time it does this I will know what to look for though .Thanks ...
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post #6 of 34 (permalink) Old 07-29-2008, 09:19 PM
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Re: Truck will not start from time to time

I was have the same kind of issue the passlock was shutting me down often it got to the point of at least once a week..
I stoped by my local GM dealer and the service writer printed me out a way to reprogram body control module .. keys or sensor with out going back to service dept. .. I was going to get a new switch and passlock sensor... he said first to reprogram old keys and sensor mighe be a glitch in firmware.... but before I did I decided to remove the bundle of keys from the key ring knowing the earlier GM key tumblers had an issue with over loaded weight on the ign key ring....I did this and I have not had a passlock problem since ....It has been three months...i put the print out in the glove box carry it with me just incase.... the extra weight may miss aligh key and not let the sensor read the key correctly!! over the long haul the weight will wear out the key slot and tumblers sure did on earlier GM models!!!

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post #7 of 34 (permalink) Old 07-29-2008, 10:39 PM
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Re: Truck will not start from time to time

ive had the exact same problem, 3 times in the past week to be exact
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post #8 of 34 (permalink) Old 08-13-2008, 06:00 PM
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Re: Truck will not start from time to time

I had the same problems with intermittent starting. Brought mine to the deal for throttle body work, all the new PCM updates, new battery, new plugs. You name it, it was there like 8 times. Finally I bumped into a guru at the dealership, he suggested replacing the crack and cam position sensors, since when they fault, they don't necessarily throw a code since the truck isn't running yet.

30,000 miles later, never missed a beat. Take a look at those and replace them. Make sure your throttle body is clean too. They seem to like to build up carbon on the back side which can affect drivablity. Good luck
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post #9 of 34 (permalink) Old 08-13-2008, 10:12 PM
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Re: Truck will not start from time to time

OK, to those of you that have had this problem. This started happening to me about a month ago and it has progressively gotten worse. I don't believe I have too much weight on the key itself but I'm experiencing the same kind of problem. The best way I can describe it is this: Key On Engine Off, I can hear the TB opening and closing just fine, however, when I go to start the truck...the only temporary fix I have stumbled upon is rapidly feathering the throttle until I get a very harsh start(shaking, backfiring). If this fails, I'm stuck waiting for 10-20 minutes(similar to Midnightrider) and then I'll try it again. All of my mods are listed in my signature if you guys think that any of them may have a hand in this. Thanks for any help.

p.s. I'm exactly sure where the "PassLock" system is....could you point me in the right direction if you believe this is the problem

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post #10 of 34 (permalink) Old 08-13-2008, 11:53 PM
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Re: Truck will not start from time to time

Here is a relearn procedure that I have never seen before.

http://chevrolet.justanswer.com/chevrol ... t-colorado

My problem went away when I stopped the habit of holding my keys between my teeth with my hands full. I believe I was jinxing the system by inserting the key into the ignition while it was wet.

Anybody else seen this relearn before?

Patrick
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post #11 of 34 (permalink) Old 04-22-2009, 07:37 AM
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Re: Truck will not start from time to time

Glad to finally find some others that have this problem... for a while I thought my truck was a lemon. It's happened to me ever since I got the truck new. Same thing... I just went 6 or 7 months with no problem, then out of the blue it won't start. I wait 10-15 minutes and it starts fine. It's happened 4 times within a month now... twice in one week. I've taken it to the dealership, but of course, they "can't replicate the problem." I somehow don't think this could be a passlock issue. I used to get really ticked off when this would happen, now I've resigned to the fact that this truck just isn't top quality. Should have stuck with Honda.
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post #12 of 34 (permalink) Old 04-22-2009, 11:23 AM
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Re: Truck will not start from time to time

You're still driving it 5 years after buying it new. Maybe it isn't that bad after all?
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post #13 of 34 (permalink) Old 04-22-2009, 11:52 AM
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Re: Truck will not start from time to time

Like I said, I've learned to live with this problem. It's more a P.I.T.A. than anything else.
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post #14 of 34 (permalink) Old 07-22-2010, 10:11 AM
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Re: Truck will not start from time to time

Post subject: Starting Problems 2 times in last week

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Posts: 1 Yes truck cranks. 07 crew cab Colorado 5 cylinder. Cranks but doesn't start. Went in fuse box and moved a couple fuses around from horn and fuel pump. Took a couple minutes then truck seemed to fire right up. Then yesterday I get to work and decide to move my truck. Now it cranks away but nothing. I move a few fuses around to replicate my last procedure but this time nothing. I am at work in Dallas and I live 30 miles away in way south Arlington Texas. I decide to call my insurance for tow back to dealer in my area but as I am stuck waiting for operator I give it one last try and it fires right up? WTF is that. NO code, no fix? Can't fix it if it is doing that. 1st thought maybe ignition. Then maybe fuel but? Now I read this possible Crank/Cam Sensor? OMG sounds like it could really become a problem. I am taking it in this weekend to dealer but I am not feeling good about what I am going to hear.
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post #15 of 34 (permalink) Old 07-22-2010, 11:06 AM
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Re: Truck will not start from time to time

I had the same problem AGAIN this morning.
I have been to the dealer 3 times now for this issue, and it has happened more than that.
First time they replaced the battery under warranty.
Second & third times they say they cannot find anything wrong.
The dealer advised me that "if it is the passlock system, the truck won't crank over at all"
I thought the passlock disabled the ignition and fuel systems, and it would still crank?
It is really getting annoying, because it usually happens when I am running behind to be somewhere.

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post #16 of 34 (permalink) Old 07-22-2010, 01:18 PM
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Re: Truck will not start from time to time

Quote:
Originally Posted by EZ1
Post subject: Starting Problems 2 times in last week

ColoradoFans Newbie

Joined: Thu Jul 22, 2010 7:58 am
Posts: 1 Yes truck cranks. 07 crew cab Colorado 5 cylinder. Cranks but doesn't start. Went in fuse box and moved a couple fuses around from horn and fuel pump. Took a couple minutes then truck seemed to fire right up. Then yesterday I get to work and decide to move my truck. Now it cranks away but nothing. I move a few fuses around to replicate my last procedure but this time nothing. I am at work in Dallas and I live 30 miles away in way south Arlington Texas. I decide to call my insurance for tow back to dealer in my area but as I am stuck waiting for operator I give it one last try and it fires right up? WTF is that. NO code, no fix? Can't fix it if it is doing that. 1st thought maybe ignition. Then maybe fuel but? Now I read this possible Crank/Cam Sensor? OMG sounds like it could really become a problem. I am taking it in this weekend to dealer but I am not feeling good about what I am going to hear.

Quote:
Originally Posted by buscopat
I had the same problem AGAIN this morning.
I have been to the dealer 3 times now for this issue, and it has happened more than that.
First time they replaced the battery under warranty.
Second & third times they say they cannot find anything wrong.
The dealer advised me that "if it is the passlock system, the truck won't crank over at all"
I thought the passlock disabled the ignition and fuel systems, and it would still crank?
It is really getting annoying, because it usually happens when I am running behind to be somewhere.
If it is the passlock system, it will crank but not fire.

When you have this situation again, look to see if the passlock light in the cluster is flashing. If it is flashing, then it is activated. Wait 10 minutes for it to reset then try starting again. If you don't wait the 10 minutes, the passlock system will take longer to reset.


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post #17 of 34 (permalink) Old 07-23-2010, 08:56 AM
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Re: Truck will not start from time to time

Thanks DB
I'll look for that light the next time.

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post #18 of 34 (permalink) Old 07-23-2010, 10:16 AM
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Re: Truck will not start from time to time

I took it in and they even said possible passlock so let's see if the code shows on their scanner. will chec back and let you all know what they told me
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post #19 of 34 (permalink) Old 07-27-2010, 10:18 AM
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Re: Truck will not start from time to time

ok I took it in and Vandergriff Chevrolet says it popped up a passlock code. Had it replaced for about 335.00 total including tax. Let's see if it does the trick. It starts beautifully now but it always has. Will keep you all posted. I do remember though after it would crank and not start I would see the little lock icon flashing on the dash panel so keep your eyes open or take it into a dealer or to someplace like autozone and have them run a scan on it. Good Luck!!
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post #20 of 34 (permalink) Old 09-08-2010, 08:47 PM
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Re: Truck will not start from time to time

Had this happen to me for the first time tonight. I didn't think of looking at the passlock light on the dash. But I wouldn't be surprised if it had something to do with it.

When I cranked and it did't start I assumed I had a fuel issue. So I popped the gas cap, listened and I could hear the fuel pump priming the system. Checked the fuel rail, we had fuel pressure. Then assumed it had to be electrical.

I just so happen to have a computer wired up into my truck and one of it's gadgets is a BT ODBII reader. I decided to see if there were any stored codes. One code came up that was unrelated, p0455. I decided to clear the codes anyways. Once I did, the truck started right up. I am not sure if clearing the codes resets the passlock and I will be sure to make attention to the light next time and clear the codes to confirm I can reproduce the solution.
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