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GMC Canyon Worn Valve Seats May Cause Engine Misfire

 
GMC Canyon Problem
28 Reports
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Model Years Affected: 2004, 2005, 2006, 2007

Engines Affected: 2.8L 4 Cylinder, 3.5L 5 Cylinder, 3.7L 5 Cylinder

Average Mileage: 95,966 mi (28,000 mi - 221,000 mi)

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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.

  • Visitor, , 3.5L 5 Cylinder, 75,000 mi

    My service engine soon light would come on and go off repeatedly. My truck began to idle really rough with low rpm while stopped at an intersection. I went to my local GMC Dealer and they diagnosed it as needing new cylinders and the extended 7 year 100,000 mile warranty covered everything.

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  • Visitor, , 2.8L 4 Cylinder, 94,000 mi

    Poor idle, terrible gas mileage, hesistation, gmc mechanics request new cylinder head and valve job.

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  • Visitor, , 3.5L 5 Cylinder, 64,000 mi

    Rough idle, Check Engine light (P0300), cylinder leak test shows #2 cylinder leaking (intake valve).

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  • Visitor, , 3.5L 5 Cylinder, 106,000 mi

    Determined that the valve seats were bad and the cylinder head needs to be rebuilt at the cost of over $2000.00. It is our understanding that GM knew of this problem and didn't notfiy anyone. Also, we have been told that since we are just over the 100,000 mile limit there is no coverage.

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  • Visitor, , 3.5L 5 Cylinder, 156,000 mi

    CHECK ENGINE LIGHT ILLUMINATED, ENGINE MISSFIRE CODE, TRUCK IDLES POORLY, WHILE IN REVERSE IT WILL ACTUALLY DIE AT THE BOTTOM OF DECELERATION AT LOW SPEEDS

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  • Visitor, , 2.8L 4 Cylinder, 55,000 mi

    Truck sputters on idle at intersections. Was just told it will cost $4600 plus tax to repair. 7 year warranty ran out last year, of course. An engine should run more than 55000 miles. Very disappointing.

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  • Visitor, , 3.5L 5 Cylinder, 156,000 mi

    Check engine light went on and off and went to dealer who said it was a computer glitch. Vehicle now misfires at low idle. If cost is in the thousands, I will have to find another vehicle.

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  • Visitor, , 2.8L 4 Cylinder

    code 300 not fixed can not afford

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  • Visitor, , 3.5L 5 Cylinder, 28,000 mi

    check engine light goes on and off. mostly on now cylinder #3 and 5 misfire. I was told about the defected head

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  • Visitor, , 3.5L 5 Cylinder, 134,000 mi

    valve 2 mis-firing. had to do a valve job.

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