Last post on Oct 17, 2006 at 8:06 PM
You are in the Chevrolet Colorado and GMC Canyon
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Chevrolet Colorado, Truck
#648 of 1033 Re: 2WD Z71 [larry25]
Jul 24, 2005 (6:22 am)
I'm a Canyon owner that is having that problem. Everyone seems to indicate it's the tires. I found this on another web site :
03-08-2005, 11:03 PM
Have yor dealer check this out it's a preliminary bulletin give them this number for reference PIT3107D
04-05 Chevrolet Colorado / GMC Canyon Z71 and Z85 Vibration Highway Speed - kw GMT355 wheel tire balance rough shake wobble #PIT3107D - (Nov 2, 2004)
04 - 05 Chevrolet Colorado GMC Canyon Z71 and Z85 Vibration Highway Speed
The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Customers with the Z71 or Z85 suspension package may experience a vibration at highway speeds. This may be caused by the tires flat spotting as a result of tires reaching high temperatures and then cooling while parked.
Please review bulletin 03-00-91-001B. Engineering is currently testing redesigned tires. At this time the correct procedure is to replace the tires with the same brand and model. No other tires have been TPC rated for this vehicle. In production, Z71 vehicles, equipped with P265/75R 15 tires, built after 5/17/04 have updated tires installed. To obtain a updated tire(s) (P265/75R 15 only) for a service application, inspect the last 4 numbers of the DOT code. Tires manufactured after date code 2504, will be an updated tire. When ordering the tire(s), it is important to order the tire(s) by its article number from the tire manufacture or store. The article number is the manufactures part number. Order article number 1548080 to obtain the 265/75R 15 tire(s) with date code 2504 or higher. Tires ordered by the this article number will assure the correct tire(s) will be received. When replacing and balancing these tires, typical road force variations should be 20lbs or less for the P265 series tire. After this road force is accomplished, test drive to confirm vibration has been eliminated.
Tires for the Z85 equipped vehicles are currently in the validation process. This PI will be updated with a julian date when one is received from engineering. When replacing and balancing these tires, typical road force variations should be 17lbs or less for the P235 series tires. After this road force is accomplished, test drive to confirm vibration has been eliminated. Note: The DOT code is usually long in numbers and resides on the side wall of the tire. The last 4 numbers make up a julian date code. To explain the julian date code of 2504, the 25 equal the week of production and the 04 indicates the year of production. So the above date code consists of tires manufactured in the 25th week of 2004 or later.
Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.
(04 - 05 GMC Canyon) and (04 - 05 Chevrolet Colorado)
Also, there are several similar reports on the NHTSA web site.
Hope this helps.
#649 of 1033 Re: 2WD Z71 [duncan95]
Jul 24, 2005 (10:58 am)
Thanks for the information, they have done this on my truck,but hasnt made it right.I think its tires but also think its in the suspension, ive had a lot of trucks but never had tires that couldnt be balanced. What have they done with your truck? Thanks for posting that Bulletin.They have road force bal the new tires LF1#RF18# LR13#
#650 of 1033 Re: 2WD Z71 [larry25]
Jul 28, 2005 (8:47 pm)
The key thing in your message is General tires. There is no such thing as updated General tires. They are lousy equipment. GM puts cheap tires on their vehicles. I wonder how much they have saved with General.
#651 of 1033 Re: 2WD Z71 [larry25]
Jul 28, 2005 (8:54 pm)
Man, You have not had General tires. They are impossible to balance. The people on here who are getting tire replacements with Generals will keep on havving the same problem.
#652 of 1033 Re: 2005 LS Crew Cab Z71 4x4 - Break-in issues [thrasher]
Jul 30, 2005 (6:52 pm)
Well thanks all for replying. I also have the cd player problem. It never shuts off when I turn the truck off. It sometimes won't even shut off if I hit the power button. I can live with that, but this vibration thing is killing me. I have also noticed the rear ABS locks up if you hit some rough bumps. According to the dealer, this is suppose to happen!?! All in all, like others have said, I do love the truck. It is comfortable, and gets great gas mileage. If it only wasn't the vibration in the gas pedal, I would be very happy. Oh well. If I come up with anything I will post.
#653 of 1033 Re: 2005 LS Crew Cab Z71 4x4 - Break-in issues [bogz]
Jul 31, 2005 (5:48 am)
If tires are a big problem go to a tire dealer and they will trade tires with you for a small fee and that problem will be fixed. That is what I did and my truck is smooth as glass. As long as you use Generals you will have trouble.
#654 of 1033 Re: 2005 LS Crew Cab Z71 4x4 - Break-in issues [motorhead1]
Jul 31, 2005 (7:34 am)
I agree, I switched to Goodyear Wrangers on 17" rims and they are as smooze as glass, with one finger driving.
#655 of 1033 air filter
Aug 03, 2005 (8:16 pm)
My truck has like 16,000 miles, and I still haven't changed the air filter--every autozone and checker around say they don't have any Colorado parts in!!! I am sure it needs changing right? I hate to pay an arm and a leg at the dealership, but I may have to I guess. When have you all changed yours? I change my Blazer's regularly, so it troubles me that noone has a Colorado air filter!!!
#656 of 1033 Re: air filter [evile1]
Aug 04, 2005 (3:57 am)
unless you spend all your time driving on dirt roads the air cleaner should last twice that. Take it out and put a light inside it and see if you can see the light through it. If so it doesn't need changing.
#657 of 1033 Re: 2WD Z71 [duncan95]
Aug 04, 2005 (7:01 am)
Duncan95, this is a very interesting and informative post. HOWEVER, my 2005 Canyon obviously would have been built after the 5/17/04 date, and would have had the "updated" tires. They still were JUNK!
Since I bought the truck in the middle of a northeastern winter (Rebates, rebates, rebates), I had snow tires on it within a week. Even though snow tires aren't usually noted for handling, their performance, handling and ride was head and shoulders over the $%##!! Generals.
I had no intention of ever putting the Generals back on, so I sold them to a local used auto parts/ new and used tire dealer. He said that he knew all about them, but since he gets a customer now and again that isn't fussy, but just wants good tread, he bought them from me. He somewhat reluctantly gave me $125 for all four...they had maybe 275-300 miles on them.
I have 16" Firestone Destination LEs on the truck now, for the summer. They're A-OK.....