Engine Misfire Due to Worn Valve Seat on Chevrolet Colorado

The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engine Light to illuminate. Replacement of the cylinder head may be required to correct this concern.

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Average mileage: 100,090 (33,500–260,000)
Engines affected: 2.8L 4 Cylinder, 2.9L 4 Cylinder, 3.5L 5 Cylinder, 3.7L 5 Cylinder
6 model years affected: 2004, 2005, 2006, 2007, more2008, 2009
84 people reported this problem
57 people shared problem details
2004 Chevrolet Colorado- 3.5L 5 Cylinder110,000
About 6 months ago my truck started the same misfire problems I've been reading from other owners. I have taken my truck to be looked at,and I was told that it would be around $2500 to $3000 for repairs. It's something when you spend $30.000 for a truck and take very good care of it,inside and out.and the dealer you bought it from tells you.he has had many reports about the same problem.Why is there not a recall put in place for this problem.I am the last person to beat up my truck or drive it like a teenager.This issue needs to be addressed to the manufacture and a recall needs to be put inplace.
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2006 Chevrolet Colorado- 2.8L 4 Cylinder62,355
Misfires, rough idle, check engine light stays on.
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2004 Chevrolet Colorado- 3.5L 5 Cylinder33,500
So, I just failed my emission test. Said my # 5 cylinder is misfiring. I replaced coil and plug with no change. Now I find out that GM has valve seat problems with this engine. If it is a common problem do you think GM will stand behind their engines and repair them or do I have to pay the total amount >|???
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2005 Chevrolet Colorado- 3.5L 5 Cylinder43,000
It seems this problem has been going on for sometime my truck only has 43,000 miles on it it should not have worn valve seats with this low milesage General motors should stand behind fixing it my repair shop says it will cost Around $3,000 to fix it.Allen Weatherman
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2004 Chevrolet Colorado- 3.5L 5 Cylinder124,605
check engine light solid always -3&5 cylinder misfire code stalls alot when stopping slowing down in traffic i have replaced spark plugs all coils
2004 Chevrolet Colorado- 2.8L 4 Cylinder
valve seats not fixed can not afford
2006 Chevrolet Colorado- 2.8L 4 Cylinder81,000
runs rough at times
2006 Chevrolet Colorado- 3.5L 5 Cylinder60,000
was replaced in the recall at 60k. has happened again at 130k.
2005 Chevrolet Colorado- 2.8L 4 Cylinder120,000
Idle rough. Misfire on different cylinders
2006 Chevrolet Colorado- 2.8L 4 Cylinder75,000
Misfire on # 3 cylinder replaced heads.
2005 Chevrolet Colorado- 3.5L 5 Cylinder110,000
chevy needs to fix these problems at no cost to us or we should all buy fords
2008 Chevrolet Colorado- 3.7L 5 Cylinder90,000
runs rough at startup , slight miss when idling , check engine light comes on. Ran checks on injectors , coil , changed plugs the miss is still there. My mechanic is sure its the valve seat in #5 cylinder. This just happened so its not fixed yet but estimated cost is $3K.
2005 Chevrolet Colorado- 3.5L 5 Cylinder115,000
wow sure seems GM has decided to turn its head and not address this very costly problem - 3.5 Inline 5 cyl I had to have the cylinder head rebuilt and it also needed pistons/rings work because it ran too long miss firing. seemed to run fair. I would recommend fixing the trouble as soon as you can and save repairing more on the engine then just the cylinder head. live & learn . Expensive lesson
2006 Chevrolet Colorado- 2.8L 4 Cylinder200,000
never been fixed
2007 Chevrolet Colorado- 3.5L 5 Cylinder260,000
it is not fixed yet. The engine misfires between 45 mile an hour and 70 mile an hour. The fourth cylinder or the 4th sparkplug I'm sitting in the oil. This is a bad thing.
2005 Chevrolet Colorado- 3.5L 5 Cylinder111,236
Oil caked on sparkplug bad Miss fire rough idle
2009 Chevrolet Colorado- 3.5L 5 Cylinder99,000
@ 99k miles, check engine light iluminated. thinking it was the 100k miIe service reminder, I decided to do the 100k mile service, plugs-fuel filter- airfilter- oil - injectors bench pressure tested....ect after service was completed the light was reset. after driving about 3 days the light returned, I had the code read to be cylinder 3 misfire, the mechanic switched the coilpacks between the number 3 and 2 cylinders to see if the code would come up again under a different cylinder,,, it did not change. have had mechanics change out plugs again, changed out all injectors and did compression test on all cylinders, all 5 were within specifications and finally had the cylinder bores scoped, mechanic with the scope said all 5 looked as good as a newer engine that he had last scoped the day before. took vehicle in to chevy dealer to get light and, now rough idle diagnostics done by chevy mechanics. Everything they suggested it could be I already had receipts for the work already being done. they were no help at all. After discovering online the possibility of valve seats leaking I returned to the dealer mechanic to inquire. they refused to cover this issue under our powertrain warranty and suggested we buy a new vehicle and trade in the old one. dealer absolutely refused to repair the one we have.... now looking for a reliable shop to exchange the cylinder head assembly only. no need for a engine rebuild. can you help us to keep a vehicle running? I can't afford to buy a new vehicle every 5 years...
2005 Chevrolet Colorado- 3.5L 5 Cylinder
Number 3 cylinder has no compression using oil! $3,000 to repair! I've had since it was new 112,000 miles taken very good care of it. No wonder Ford is #1.
Check light misfire change all parts did not help ...
2004 Chevrolet Colorado- 3.5L 5 Cylinder182,000
#3 Cylinder has no compression. Prior to this engine would misfire and stall after warm up.
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