Car Problem Reports
GMC Canyon Worn Valve Seats May Cause Engine Misfire
GMC Canyon Problem
Engines Affected: 2.8L 4 Cylinder, 3.5L 5 Cylinder, 3.7L 5 Cylinder
Average Mileage: 97,917 mi (28,000 mi - 221,000 mi)
Visitor, 2005 GMC Canyon, 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.
Visitor, 2006 GMC Canyon, 3.5L 5 Cylinder, 64,000 mi
Rough idle, Check Engine light (P0300), cylinder leak test shows #2 cylinder leaking (intake valve).
Visitor, 2005 GMC Canyon, 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.
Visitor, 2006 GMC Canyon, 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
Visitor, 2006 GMC Canyon, 2.8L 4 Cylinder, 94,000 mi
Poor idle, terrible gas mileage, hesistation, gmc mechanics request new cylinder head and valve job.
Visitor, 2004 GMC Canyon, 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.
Visitor, 2006 GMC Canyon, 2.8L 4 Cylinder
code 300 not fixed can not afford
Visitor, 2006 GMC Canyon, 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
Visitor, 2005 GMC Canyon, 3.5L 5 Cylinder, 134,000 mi
valve 2 mis-firing. had to do a valve job.
Visitor, 2006 GMC Canyon, 2.8L 4 Cylinder, 57,600 mi
Multiple cyl. misfiring, gas mileage has depleted drastically. Most problematic gm I've ever owned, sadly disappointed!