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: 102,851 (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
105 people reported this problem
problem details
2004 Chevrolet Colorado - 3.5L 5 Cylinder 110,000 mi,
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.
2004 Chevrolet Colorado - 3.5L 5 Cylinder 33,500 mi,
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 >|???
2006 Chevrolet Colorado - 2.8L 4 Cylinder 62,355 mi,
Misfires, rough idle, check engine light stays on.
2005 Chevrolet Colorado - 3.5L 5 Cylinder 43,000 mi,
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
2004 Chevrolet Colorado - 3.5L 5 Cylinder 124,605 mi,
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
2006 Chevrolet Colorado - 2.8L 4 Cylinder 75,000 mi,
Misfire on # 3 cylinder replaced heads.
2005 Chevrolet Colorado - 3.5L 5 Cylinder 110,000 mi,
chevy needs to fix these problems at no cost to us or we should all buy fords
2005 Chevrolet Colorado - 2.8L 4 Cylinder 120,000 mi,
Idle rough. Misfire on different cylinders
2008 Chevrolet Colorado - 3.5L 5 Cylinder 125,000 mi,
engine runs terrible on start up rough idle engine light comes on and off
2004 Chevrolet Colorado - 2.8L 4 Cylinder
valve seats not fixed can not afford
2006 Chevrolet Colorado - 3.5L 5 Cylinder 60,000 mi,
was replaced in the recall at 60k. has happened again at 130k.
2006 Chevrolet Colorado - 2.8L 4 Cylinder 81,000 mi,
runs rough at times
2008 Chevrolet Colorado - 3.7L 5 Cylinder 90,000 mi,
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 Cylinder 115,000 mi,
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
2005 Chevrolet Colorado - 3.5L 5 Cylinder 111,236 mi,
Oil caked on sparkplug bad Miss fire rough idle
2005 Chevrolet Colorado 75,000 mi,
#2 cylinder bad. Runs rough w/engine light on. $3500 to fix. There'll be-no cost coverage by Chevy. What?? The dealer says the "campaign" (not recall) to rectify this known problem is over, but they'll "work with us" and will give us a $250 discount. Ha ha. My hubby has owned 3 Chevy's in a row, so he's been a loyal customer. Loyal customers don't deserve to be rewarded with this sort of rip-off. He has babied this truck from the start, but now it's toast. Agree with a previous poster - we'll buy Dodge, Ford...anything but Chevys from now on.
2006 Chevrolet Colorado - 2.8L 4 Cylinder 110,000 mi,
same problems with the check eng light. Took it to the dealer and they replaced the head for free at around 90K then the same thing is happening within 20K of the work being done to it.
2004 Chevrolet Colorado - 3.5L 5 Cylinder
Check engine light. Failed emissions. Misfire code. New motor very costly. Started around 65K miles. Will not buy another Chevy.
2005 Chevrolet Colorado - 3.5L 5 Cylinder 140,000 mi,
Not fixed...replacement of plugs it went off...then come on saying tb code...cleaned it then misfire happened again....
2006 Chevrolet Colorado - 2.8L 4 Cylinder 89,000 mi,
Truck misfires. Check engine light is on. This problem started at 40k miles. I Used injector cleaner, and I used engine restorer and passed smog test two times in a row when check engine light turned off. Now it has 89000 miles on it. No restorers and cleaners work anymore. Cant pass smog test anymore. Friend Mechanic suggested to buy repair kit and repair head instead of replacing it. Said its gonna take longer to fix it cause he needs to take engine head to machine shop. That way he said it will last longer than new head from dealer. still will cost around $2k to repair it. He said most of cost would be labor, thats why mechanics usually suggest to buy new head instead of repairing it so they dont have to spend time taking it apart. By the way dealer does sell repair kit which cost around $300 and machine shop cost $200-$300 depending on damage.