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.Google+
Car Problem Reports
Chevrolet Colorado Worn Valve Seats May Cause Engine Misfire
Chevrolet Colorado Problem
Engines Affected: 2.8L 4 Cylinder, 2.9L 4 Cylinder, 3.5L 5 Cylinder, 3.7L 5 Cylinder
Average Mileage: 91,866 mi (33,500 mi - 226,000 mi)
Visitor, 2006 Chevrolet Colorado, 2.8L 4 Cylinder, 62,355 mi
Misfires, rough idle, check engine light stays on.
Visitor, 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
Visitor, 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
Visitor, 2006 Chevrolet Colorado, 2.8L 4 Cylinder, 75,000 mi
Misfire on # 3 cylinder replaced heads.
Visitor, 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.
Visitor, 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 >|???
Visitor, 2006 Chevrolet Colorado, 2.8L 4 Cylinder, 81,000 mi
runs rough at times
Visitor, 2008 Chevrolet Colorado, 2.9L 4 Cylinder, 59,000 mi
Engine runs rough especially when cold. It smooths out somewhat as the car warms up. Local service person could not find the problem. Took it to the dealer, they ran a compression check (wonder how they knew to do that? Hmmmm) and they say it is due to valve seat recession and that I need a new head. At a cost of $3000. I WAS a loyal Chevy truck owner but now I'm a very unhappy one.
Visitor, 2006 Chevrolet Colorado, 3.5L 5 Cylinder, 107,702 mi
Engine running rough as missing one or more cylinders, engine light flashing. Vehicle sat over night, engine runs smooth with engine light on solid. On Star contacted performed real time diagnostics found "misfire code".
Will investigate possible head replacement with hardened seats. Thanks GM for standing behind your product (NOT).
Visitor, 2006 Chevrolet Colorado, 3.5L 5 Cylinder, 76,000 mi
#5 cylinder is shot, it keeps blowing out the rear main seal. they tell me I need a new engine. $3500