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Chevy Colorado and GMC Canyon Engine Problems



  • nogmfannogmfan Posts: 4

    It's possible you have the cylinder head problem. If you haven't already done so, take it in to the dealer and have them check it out.

    There's a coloradofans website with lots of technical and first hand owner info about the head problems on the I4 and I5 GM engine.
  • cairncairn Posts: 1
    Does the four cylinder engine exhibit the same forementioned problems with the cylider heads as the five cylinder? Just curious as I recently purchased a Colorado with the 2.8L four cylinder. Thanks.
  • donn2390donn2390 Posts: 23
    It depends on the year of the vehicle. The I-4 did have the problem, but all cylinder head/valve problems seem to have been solved with the 2007 model year
  • I recently had the head replaced on my 06 Canyon due to rough idle and a mis-fire in cylinder one. I got the truck back and it's definately running better, smoother idle etc. however I drive over a very steep mountain and it has totally lost its umph in that situation. Has anyone else experienced this?

    I played dumb on the phone and asked if the head replacement was a wide spread problem and the guy said no. Riiiight... I've done my research buddy! :shades:
  • gmbluesgmblues Posts: 7
    Luckily for me I haven't had any real serious problems with my 05 Colorado. But I just found out about this valve problem when I got a notice in the mail from GM. So I'm just starting to research the issue. Basically they are extending the warranty for this issue to 7 years (I think that is the number, I don't have the letter in front of me) or 100,000 miles.

    I have about 37k miles on the truck now. The only problem I'm seeing is during cold starts the engine will misfire while cranking.

    My question is should I start chasing after a dealer now to replace the heads. My gut tells me to wait and let the mileage rack up and see how it goes. But I also don't want to get stuck some place or have the truck down for an extended amount of time if the dealer has to order parts.

    Any advice??


    BTW Over the years I have definitely been a GM fan and loyal to the bow tie. I made a conscious decision to purchase the Colorado over a Toyota because it being a US built truck by a US company. Well I'm afraid this may be the last GM product for me. I also had a Bonneville with intake manifold problems (costing me $2,000) which GM hung me out to dry on....
  • febrilefebrile Posts: 9
    What is your mileage figure? My '05 Z85 LS I5/5speed manual went from 24mpg down to about 20mpg. After the head was replaced, it is back to 24. It doesn't pull hills in 3rd @ 20 mph as well as it did when new. 30K now.
  • tm4tm4 Posts: 19
    You got a notice in the mail? When did GM start handing those out? Is everyone else getting them too? So far I have not had any trouble since the head was replaced on my 06 I-5. But it would be nice peace of mind to know that the waranty has been extended.
  • leadfoot4leadfoot4 Posts: 593
    I got my notice yesterday. I have an '05 with 18,000 miles on it. So far, so good..........
  • gmbluesgmblues Posts: 7
    Sure did. It's good to see GM taking this step but you know it's because the problem is significant. I don't know who will qualify for the extended warranty.

    Here is another forum that has a lot of good info

    Here is a copy of the letter....

  • cdf1cdf1 Posts: 3
    If you have not got your letter from GM it's coming and it's paid by GM if you still have warr. this is a new warr. they have just started it not a recall because is not a safety item
  • Just reached 47K miles on 05 Z71 and have the head problem. Fortunately I received the warranty letter last week. The heads are presently on back order.

  • What kinds of symptoms were you seeing?

    Also I'll be interested in your opinion on how the truck runs with the new head. Some people have complained about less power.

  • "Check Engine" light was on and I experienced an intermittent idle roughness...more a vibration. The head is on back order and I have not been given an ETA as yet. I have two acquaintances with 2006 models and they have experienced the same problem and head replacement at 32K and 36K mi. I'll keep you posted on the "after head" performance.
    In their defense the dealer gave me NO trouble or doubletalk...checked OBD codes and ordered the head. (Harbor Chevy in LB CA)

  • poncho167poncho167 Posts: 1,178
    Does anyone know how common this is percentage wise? Even though the trucks haven't been out 5-years, I wonder how many with high mileage have not experienced this problem? I am a little concerned about this because my nephew bought a 2005 GMC with 5-cylinder this past winter brand new. It is his first vehicle.
  • I don't know if I have ever heard a percentage given. I would imagine only GM has those figures. I don't think you will get anything from them. You read about a lot of problems, but the vast majority have never had a problem, so those people aren't in here writing.
    It is obviously a serious problem does exist, hence the extended warrantee that recently came out. The problem seems to have been completely resolved in the 2007 model. Owners of trucks manufactured before 2007 should not have to worry with the 100k mile warrantee. By that time, you have either already had your head replaced under warrantee, or you're not going to ever have a problem.
    The 2007 heads have no problem, GM found out the problem and fixed it successfully, and use the same knowledge in the replacement heads. Heads replaced on older models will now be bulletproof.
    Tell your nephew to rest easy.
  • Dealer replaced head, but took 2 weeks to get all the parts in and another full week to do the work. Has been running ok now, 25-26 mpg highway. I have discovered I really don't like the HUGE turning radius of this truck, wow, rented a Lincoln Town Car and it turns MUCH shorter.
  • dmathews3dmathews3 Posts: 1,739
    Maybe after you load a half ton of dirt in the trunk of the town car you will change your mind. Come on lets compare apples to apples :P
  • Ahh the Ranger. Prior to the Colorado I had a 1999 Ranger. The truck served me well but looking at a new Rangers it was literally identical to the one I had. So I couldn't get myself to buy one. I've always been a GM person so going to the Colorado was not to difficult even though I thought Ford did a better job detailing the Ranger.

    Now I'm totally pissed off at GM and will probably never purchase another GM product. I should have gotten the Ranger or even the Tacoma if I could get past the foreign car thing.
  • You got your head replaced for free, the truck runs great and you get 25-26 miles per gallon. Sure sounds to me like you have plenty of reason to be upset with GM.
    I guess driving Fords for a few years screwed up your reasoning abilities......
  • The head was replaced by Harbor...took four days. No questions, all expenses paid. I don't notice any change in performance as has been reported by other posts but I've only put a hundred or so miles on it. They rented me an '07 Colorado and it was a bit quicker. While they were at it they also replaced the throttle body for a "low idle" code. I never saw this problem but at close to 50K miles I'll take all the new parts I can get.

  • No it's not the Ford it's General Motors! In fact, I didn't want to but the Ford initially but at the time I thought the S-10 was a lame excuse for a truck and couldn't compare to the Ranger. I also had $3,000 in GM points from my GM card that I could not use. So this was strike for GM with me.

    Strike two, my wife's Bonneville blew a head at 60K miles which was the result of a known water leak problem in the intake. That cost me $1,500 and several days of aggravation, not to mention having my wife on my case.

    Strike three, I purchase the Colorado and there’s known problems with the head? Come on, that is ridiculous! Yes, the repair is at no cost but the top of the engine has been ripped apart and hopefully put back together right. So that’s next, another engine issue, DEXTROL corroding the engine, electrical component issues (brake switch, etc)?

    Believe me every car I have owned has been a GM product (other than the Ranger) but I do not expect to purchase a new car/truck and have to have major engine repairs done. Free of not!
  • dmathews3dmathews3 Posts: 1,739
    I suggest you run right down to your local Toyota dealer and trade it in on one of their 07 Camarys. Please do NOT go to the Edmund site on 07 Camarys and do not read all of the problems with them. After all it's a Toyota so all is well. Do not believe how many hundreds of percent more Toyotas have been recalled then in previous years. This is all fanisy as cars from Japan never have problems. Well I've said enough, see you at the Toyota site in a few weeks. :shades: :P
  • poncho167poncho167 Posts: 1,178
    If you think the Colorado has a big turning radius for a pickup, check out the Toyota Tundra. I was almost laughing at watching two of them the other day trying to make a simple turn without going over a curb. It is normal for a truck, especially when four wheel drive, to have large turning ratios.
  • tm4tm4 Posts: 19
    At least none of GMs problems have been related to killing people! The link below is one to consumer affairs website where it talks about Ford Trucks randomly bursting into flames and burning down to the ground.

    Also, the new Tacomas have brake failure problems which have led to people beig in serious accidents. Motor Trend, Road & Track, and Car & Driver all had problems with brakes in their Long term tests of the new Tacoma.
    The Colorado may have a design flaw, but at least it can't kill you and GM is fixing it for free.
  • dmathews3dmathews3 Posts: 1,739
    Don't forget the big engines in the Toyota trucks blowing up. Problem with Toyota is they have the same standard reply. Everything is working as designed. :lemon: :lemon:
  • poncho167poncho167 Posts: 1,178
    The Tundras are not blowing up, the engines are just decinagrating because of bad camshafts. Oh I forgot, Toyota didn't make the camshafts. According to Toyota it was a contractor. What a bunch of baloney propaganda. I don't think any auto manufacture makes their own crankshafts nowadays. Put the blame on someone else is what Toyota is good for like the engine sludge problems that they say were caused by lack of owner maintenance. After lawsuits were filed Toyota finally admitted to their sludge problems and extended the warranties.
  • Anyone have suggestion? My 06 4 cyl. Colorado has 33,000 miles. Since 24,000 miles (June 07) has rough idle sometimes shaking truck. Dealer in June said it was misfiring on all cylinders & they were stumped but suspected water in fuel. Same day though they said reconfiguring the computer had taken care of it. I left shop and engine was still missing. July 19 took truck back with check engine light frequently on. Dealer said it was a known GM problem, GM working on it. Call back in a couple of weeks. Aug. 8 took truck back again after engine went dead in an intersection while I was making a rolling right hand turn. Dealer replaced fuel pump and spark plugs and said water in the fuel. They challenged me to not go to same service stations ( I haven't and have run the fuel low enough for "low fuel" light to come on trying to suck out any water in the tank...wife gets her fuel at same station and has no problems)..Truck still had miss when I left shop. Sept.26 going down interstate at 70MPH check engine light comes on, I feel a loss of power then seat belt light comes on followed by oil pressure light followed by "FAULT" showing in speedometer display. I get it off the road OK, turn key off then restarted the engine and it ran smooth as silk the rest of the way home. Dealer said computer was loosing communication and they replaced the computer. Truck engine still intermittently missing ( particularly noticible at idle when the truck sometimes shakes) . Called dealer again....they say it's a known GM issue and that GM is working on it and to call back in two weeks...Meanwhile the truck goes out of warranty in another 2500 miles or so and I feel I'm in a loop. I called another Chevy dealer but they don't want to work on it since another dealer already has the thread. Any advice? Thanks

  • It sounds like you have the problem with your head that is quite common with that engine. it also sounds like your dealer has a problem with his head, as he must be a complete idiot not to know about it.
    This problem has been discussed at great length on web site. Go there and learn, and try to find a dealer with a clue. That "Call back in two weeks" thing is just a way to get you to go away. They don't have a clue what they are doing...
  • Thank you!

    I indeed am running out of patience. I'm waiting on a callback from my dealer. If no contact from them by end of week I shall call an attorney and explore lemon law. Would be happy for them or another Chevy dealer to just fix the truck because I feel it's just a problem that needs repair and not an inherently bad truck. Thanks again.

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