Last post on Dec 03, 2013 at 4:39 PM
You are in the Chevrolet Colorado and GMC Canyon
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Chevrolet Colorado, GMC Canyon, Engine, Truck
#667 of 716 Re: Almost 3K into Head #3 on '05 Colorado,Fingers crossed!
Aug 23, 2012 (7:32 am)
If you had bothered to READ my post you would know that the CYLINDER was NOT replaced, the head was for the SECOND TIME making this the 3rd head on that engine in 102000 miles.
The previous head was replaced for the same reason at the same dealer just a different valve seat/cylinder involved. Also the exhaust manifold/catalytic converter(a one piece unit, another bright idea from Chevrolet) were replaced due to a crack in the manifold!
The check engine light is still on all the time & I get intermittant signals that my gas cap is loose(it's not)the vacuum recovery system is faulty somewhere between the tank & the charcoal canister.
Other than that it is running fine but then it was prior to this happening & then it wasn't & $2900 later it was again! So not only are my fingers crossed but my toes & everything else!
The decision I have to make now is do I spend the money for an extended warranty or send it down the road before it costs me more?
#668 of 716 Re: Almost 3K into Head #3 on '05 Colorado,Fingers crossed! [pianoman435]
Aug 23, 2012 (8:38 am)
I'm sorry that I misread your original post, pianoman453. Thank you for taking the time to clarify that for me. When you contacted Customer Service, were you issued a case number (71-**********)? Please forward that to us at socialmediagm.com (or the last 8 digits of your VIN) and we will look into this further.
GM Customer Service
Sep 20, 2012 (11:00 am)
So, i have this recurring code. Bank 1, sensor 1 insufficient switching. So far this is what I have done to it to try to remedy the situation: (2) new oxygen sensors, new exhaust manifold, new feul pressure regulator, new intake air resonator box, new thermostat, exhaust cam position solenoid. When monitoring the front o2 sensor while driving, it switches fine at idle and very light throttle BUT if i accelerate and maintain speed above 1500rpms the o2 sensor stays in the .70-.80 range. I hope someone out there has had experience with this and can tell me what I might be doing wrong(?).
#672 of 716 8 Cylinder Engine
Sep 25, 2012 (12:42 pm)
I'd like to hear from anybody with the 8 cylinder engine. Have you encountered any problems? Does the engine have the cylinder de-activation? What's your fuel mileage? Thank you.
#673 of 716 Re: 8 Cylinder Engine [jpf]
Sep 29, 2012 (2:24 am)
We have a 2010 Colorado crew cab with the 5.3L V8 & 4 speed auto trans. It does not have cylinder deactivation. No problems with the powertrain at all. Haven't tracked the fuel economy, sorry.
#674 of 716 Engine noise
Oct 01, 2012 (3:44 pm)
I have a 2004 Colorado, with the 3.5L. When I start the engine it rattles like it has bad rod bearings. Then when your driving under light throttle it makes a similar sound. I all ready know about the cylinder head issue. I had brought it to the dealer multiple times and was told that my head was ok. But the engine was not making these sounds back then. Plus my truck is past their notice limitations. I had heard some time ago that there was an issue with the timing chains and guides. Could this be the rattle issue that I have? Has anyone else had this simular problem? Or should I be looking elsewhere ? Please Help.
#675 of 716 Re: Engine noise [day4041]
Oct 02, 2012 (3:10 pm)
My 05 3.5L has 90k on it and while i dont have any head issues it has had the supposed timing chain noise for the last 10,000 miles. It runs fine and performance doesn't suffer any but it does get annoying. I found that putting in half a bottle of Lucas synthetic oil stabilizer quites it down some, especially during the winter. If anyone knows of any long term damage from this please share. good luck to all of us!
#676 of 716 Re: Engine noise [sportster911]
Oct 02, 2012 (4:05 pm)
I hate to be the harbinger of doom buddy, but thattruck you have there. Well just make it quiet and run away from it as fast as you can! I had the same pig and traded it in as soon as the warrenty ran out! Problem after problem! The noise your hearing if as you say is the timing chain or the advance/retard mechanisim for the cam, then I`ll tell you if it is not replaced with new parts you will blow the engine. These engines are low clearance heads. They will not clear the piston head when at top dead center. Resulting in vales that are left open whenb the piston comes up will crash threw the tops of the pistons. Let a qualified mechanic look at it. Are you having any codes coming up? Is your engine light flashing on and off by any chance? You can take it to autozone and they will read the codes for you for free. Don`t let them clear it so the dealer or mechanic can see them also. Good luck! I`ve had no problems sense I got rid of mine!