08 Silverado w/ check engine light on

dtaylor
35

Asked by dtaylor Jul 29, 2011 at 10:03 PM about the 2008 Chevrolet Silverado 1500 LT1 Crew Cab

Question type: Maintenance & Repair

I have a 08 Silverado 4.8L. The check engine light came on. I took it to Auto Zone. They said cylinder #4 is misfiring. Probable cause is faulty spark plug, wire or core. I have all the items replaced, and the light came back on and Im getting the same code after replacing everything new. Does anyone out there know what the problem may be. The truck only has 78K on it and runs like a top, but I hate seeing that light on.

12 Answers

papa
Not Active

unhook your battery,eather side for about 10 minutes,it will clear the code from computer and light will go out.

5 out of 5 people think this is helpful.
Tom Torres
2,125

is it a dead miss?

dtaylor
35

Ill give it a try. I had Auto Zone clear the code with the computer, and it stayed off for a day, then came back on.

3 out of 3 people think this is helpful.
fdaniel
20

I DONT HAVE THE ANSWER BUT MY TRUCK IS DOING THE SAME THING, BUT THE CHECK ENGINE LIGHT COMES ON AND THEN THE CONSOLE READ A/C OFF ENGINE HOT BUT MY ENGINE IS NOT HOT. NOW MY AC WILL NOT COME ON

2 out of 2 people think this is helpful.
Jean Smit
375

take it to a dealership and have them check the engine if the 4th cylinder is missing there may be a problem with the engine if it's under 100k they should replace it for you they did on my cobalt at 76k

1 out of 1 people think this is helpful.
Dan Malloy
725

does it sound rough when it runs that would confirm a missfire as a probability it could be causted by a mistiming

Matthew Newman
95

sounds like a coil pack for # 4.

Kevin Robinson
1,255

most common problem is bad lifter for missfire , you also hear slight noise , yes as jean stated the warrenty is 5years 100k so dealer can warrenty that

1 out of 1 people think this is helpful.
mattsgotagun2
10

fdaniels< i had the same thing happen to mine it turned out the thurmostate was bad, powertrain covered it.

1 out of 1 people think this is helpful.
hogger
40

I drive 100 miles per day. My 4.8 dropped cylinder 4 at 116000 miles. Ran great with a little rough idle once in a while. Dealer serviced regularly.

4 out of 4 people think this is helpful.
Davids08silverado
20

Did you ever find out what the problem was I have the same issue I have changed my wires plug and the coil and it is still lighting up check engine misfire 4 my ruck is past warranty I'm 180000 miles thus is the only problem with the truck it's in excellent condition besides this

2 out of 2 people think this is helpful.
kountrywildhorse
0

I have two Colorado's I've been told that a code reading misfire on cylinder 4 can be bad catalytic converters as well.

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