Last post on Dec 10, 2013 at 12:34 PM
You are in the Chevrolet Colorado and GMC Canyon
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Chevrolet Colorado, GMC Canyon, Engine, Truck
#153 of 717 Rough Idle..Engine stopping
Oct 07, 2007 (5:04 pm)
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
#154 of 717 Missing 4 cyl
Oct 10, 2007 (2:48 am)
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 http://coloradofans.com/ 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...
#155 of 717 Re: Missing 4 cyl [donn2390]
Oct 10, 2007 (5:34 pm)
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.
#156 of 717 Re: Missing 4 cyl [rogertv]
Oct 13, 2007 (4:42 am)
It sounds like the head problem to me also. I doubt a lemon law would apply at this time.
If you have this documented at the dealer and is not resolved in time, you still should be safe after experation.
#157 of 717 Re: Missing 4 cyl [rogertv]
Oct 13, 2007 (2:29 pm)
This is such a common problem, everyone is aware of it. If your dealer pretends not to be familiar with it, he is either a liar, or way to uniformed to bother with. No matter how inconvenient, take it to another dealer that has a clue. I'm guessing he is aware, just trying to be a hero. Go to someone who cares about customers......
#158 of 717 Re: Advice on the I-5 Valve Problem [bpmike]
Nov 04, 2007 (9:38 am)
I HAVE 04' COLORADO 4X4, CHECK ENGINE WAS ON AND HAD VERY ROUGH IDLE. TOOK MY TRUCK TO HARBOR CHEV. WITH MY LETTER WHICH THEY SAY THEY HAVE NEVER SEEN BEFORE. THEY CHECKED THE CODES-P0303 CYL. 3 MISFIRE AND P0506-IDLE CONTROL SYSTEM LOW,RPM LOW. THEY WANTED TO PART SWAP TO SEE IF A NEW $400 THROTTLE BODY WOULD FIX THE PROBLEM. I SAID I WOULD BRING IT BACK. WENT TO AUTOZONE USED THEIR CODE READER AND GOT A PRINT-OUT. THE CLERK SUGGESTED A $4 BOTTLE OF CLEANER AND A GOOD CLEANING OF THE THROTTLE BODY. I DID IT AND IT WORKED FOR THE ROUGH IDLE. BUT I STILL LOSS OF POWER, LOW GAS MILEAGE AND #3 CYLINDER STILL MISFIRING. TOOK IT TO CHAMPION CHEV. IN L.B. CA TO CHANGE FUEL FILTER AND FUEL INJECTOR SERVICE AND GAVE THEM THE CODES. THEY HAVEN'T SEEN THE GM LETTER EITHER. THE WORK WAS COMPLETED AND EVERYTHING WAS RUNNING GREAT SO THEY SAID. I WENT TO START IT UP AND LEAVE AND THE ENGINE LIGHT WAS ON ALREADY, DROVE 10 FT. TO THE SERVICE TECH. ED AND HE SENT OUT THE MECHANIC WITH HIS DIAGNOSTIC READER. HE TOLD ME THAT I PROBABLY NEED A NEW CYLINDER HEAD BECAUSE OF THE MISFIRING AND NOW A NEW COMPUTER BECAUSE IT WENT BAD WHILE HE WAS HOOKED UP TO IT. NOW I AM TAKING IT BACK IN TOMORROW FOR THE WHOLE WEEK. AFTER HARBOR CHEV. I CONTACTED GM CUSTOMER SERVICE AND I HAVE BEEN DEALING WITH PAUL GRANT (866)790-5600 EXT. 31502 BECAUSE HARBOR CHEV. TRIED CHARGE ME $99 FOR THEIR MISDIAGNOSIS THAT WOULD OF COST ME $400 THAT WOULDN'T HAVE FIXED THE PROBLEM. WELL I DON'T OWE THEM $99 ANYMORE BUT I AM NO LONGER ALLOWED ON THE PREMISES, TOO BAD. I ADVISE ANYONE TO CALL PAUL GRANT, IT MIGHT LIGHT A FIRE UNDER GM'S BUTT TO GET ALL THEIR DEALERS TO BE HONEST WITH THEIR CUSTOMERS. ANY ADVICE ON GETTING CHAMPION CHEV. TO FOLLOW THROUGH AND REPAIR THIS AT NO CHARGE.
#159 of 717 Re: Advice on the I-5 Valve Problem [jknavarro]
Nov 04, 2007 (10:22 am)
Take it to a different dealer, If the truck has less than 100,000 miles on it, and the dealership finds that it is the valve/cylinder it should be covered under warrantee. GM mailed out letters to alot of people with older Colorados extending the warrantee to 100,000 miles. I believe somebody posted a copy of the letter earlier on this same thread.
#160 of 717 Re: Rough Idle..Engine stopping [rogertv]
Nov 12, 2007 (4:22 pm)
My 04 Colorado is in the shop. I got a letter from Chevy stating because of bad valve seats (same symptoms as yours) they would put a new head on if under 100,000 miles. I had 99, 650 so I went direct to the dealer and sure enough, they said I qualified. Now they say they are rebuilding the head instead of a new one but hey, at 100,000 miles I guess it's better than paying for it!
No one could diagnose problem before, my local mechanic wanted to
"service" injector system at $700 bucks! So I'm happy, it wasn't a major problem, just a pain for the light to come on and off with some rough idle at times. I like the truck, I tow my 19' Bayliner with it as well as my pop up tent trailer.
#161 of 717 Re: 04 Chevy Colorado- engine will not start twice STRANGE [vatak]
Nov 12, 2007 (4:26 pm)
I had the same problem. It's a security problem probably triggered by a faulty ignition switch. If it "senses" something wrong, the car will not start for 10 minutes. Look at the dash panel, you will see a flashing "lock". It's mentioned in the owners manual. Mine did it a couple times a year until it finally quit doing it. I've got over 100,000 miles now.
#162 of 717 Re: Rough Idle..Engine stopping [llangley]
Nov 12, 2007 (10:29 pm)
That's good, GM stepped up.
I traded my 05 Colorado even before they started working on the motor.
And the trade in value was like my truck was in good running condition. I had 88,000 miles in over a year.
I'm happy with my 07 Silverado LT. I get good mileage, 22/23 mpg, if I don't go over 70 mph. I also replaced my air filter with K&N. (not the kit).
Good luck with your Colorado.