It is probably the throttle sensor on the throttle body.

There is a big thread on the site, try to find it and read through, see if the symptoms match.

 

I think she is fuel injected.

 

Thanks for the input .

 

It is fuel injected, the throttle body just delivers air.
The sensor (actually a motor) follows the movements of the gas pedal, opening and closing the throttle body butterfly.
Find the thread I referenced and take a read.

 

Sean, seriously dude? You think a resident expert with over 12,000 posts didn’t know your 2013 Chevy is fuel injected? C’mon man. You come to a premier forum for advice on GM products, expect you’ll get a solid answer. Here’s the thread. It’s been on this forum for a decade. You’re welcome.

Service Stabilitrak, Service Traction Control, and...

Driving to work this morning my 09 silverado 1500 stalled out twice. Both times the initial indication of "Stabiltrak disabled" came on, followed by "Service Stabilitrak" followed by "Service Traction Control" lastly followed by "Reduce Engine Power" and eventually the engine stalled out leaving...

www.gmtruckclub.com

 

Thanks Reb, let's give him the benefit of doubt and think he may have thought I was talking about a problem that applied to throttle body injection.

Btw, thanks for digging out that thread.

 

You’re right Ray, apologies to the OP. No problem, you know that one used to be a pinned thread in the Silverado forum before the “update”. Should probably pin it again. What say you MODERATORS?

 

I'm sorry, I did not wish to offend anyone. I'm new here and have no idea how much experience anyone here has. I was merely trying to put forth the proper information to help get the correct answer to my problem. I did not realize I had posted that in a mean or degrading fashion. I'm sorry for having done that.

 

Not to worry, it's all good

 

 

My 2010 Silverado did the same thing. 111,422 mile on a 5.3 L V-8 with EFM system. Cause was catastrophic valve train failure, cylinder #7. New engine time. Engine tear down showed oil starved lifter wear in cylinder #7 and considerable oil sludge in the left rocker cavity while the right side was clean.

 

O dear.... Thats not fun. Well thanks for the info. O boy the fun begins.....

 

And that is the reason every LS engine should be using synthetic oil.

Synthetic oil does not sludge.

Of note, there is a small filter in the passageway to the lifters.
This filter must be changed, but not as often as the oil filter canister.
I suspect this filter will sludge and restrict oil flow.

Use "AFM oil filter" to search for the filter info

 

Sean, don't panic, your mis-fire is cylinder #5, the AFM lifters that fail are #1, 4, 6 and 7.

At this time, you have no AFM worries.

Did you read the thread that @Rebel_Bowtie linked into this thread?

There is a reference to a service bulletin (a TSB) within that thread, read it and see if it describes your problem.

If that is your problem, GM will repair it for free.

 

If I was reading the right thred, it spoke of " reduction power " error. I never got that error.

 

True enough, that's Limp Home Mode; perhaps yours hasn't degraded enough for the computer to reach that state.

If the mis-fire is unique to #5, it may be something impacting only #5. You've changed things related to spark, it may be fuel delivery.
It may be valve related.
Maybe a compression test will show something.

However, none of the above should turn on the traction/stability messages.

A bad brake light switch will cause both of those messages to pop up.

And, to make matters worse, none of the above will cause a rough un-driveable engine; yes, a mis-fire in #5 will cause some roughness; but not driveable roughness.

 

To Ray, you mentioned "A bad brake light switch will cause both of those messages to pop up", can you please elaborate on this? Which both messages (misfire and stabilitrak)?
I have a 2009 GMC Sierra 1500 with exactly the same issues: misfire 305 and at the same time stabilitrak error (disabled) but no loss of engine power. Always and ONLY happens at 75 mph or more (happens at 2600 rpm or more). How can this occur from "A bad brake light switch"????

I know that this is an old thread, but this is exactly my problem.

 

Yours would not be the brake light switch.
A worn switch can toss up the traction and the stability messages when the brake is applied.

 

I know this is a much older post, but was there ever a solution to the above issues without losing power or limp home mode? Some research I've done has said back battery cables. Does that have merit, or should I look into something else?

I have a 2007 Silverado 1500 with the 5.3 (I believe) for reference. My first thought was a bad battery or spark plugs. I got the battery checked out, and that was fine. I replaced the spark plugs, which helped for a couple of days, but now it seems to come and go as described in the original post.

Any help is appreciated. Thanks

 

Same thing happened to me, cylinder six misfire - traction, control and stabilitrack warnings, running very rough. Replaced plug wire, spark, plug, coil on number six. Did not help Finally replaced fuel injector on number six, that solved it! If you're going to do this yourself, be sure to get a set of upper O-rings for the entire side.