GM Truck Club Forum banner

1 - 20 of 452 Posts

·
Registered
Joined
·
52 Posts
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 me with only manual steering and brakes.

Has anyone had this issue before? Truck only has 26,000 mi on it... still under warranty... but want to be as prepared for the dealer discussion as possible when I drop it off this evening (if I can make to the dealer).

Thanks all.
MJ

2012_GMFleet_vehicle_overview_gmtechnology_stabilitrak_oversteer_hero_450x130_11.jpg
 

Attachments

·
Registered
Joined
·
52 Posts
Discussion Starter #2
got it - thanks Mike. Going to have to take it in. Reduced power followed by stall keeps occurring.
MJ
 

·
Registered
Joined
·
52 Posts
Discussion Starter #3
An update: Took the truck into the dealer. Turns out some '09s (and '07s, '08s) were made with faulty air intakes. The plastic on these intakes can wear down over time and fracture. The fracturing causes small plastic particles to enter the engine, and as a defense mechanism the computer shuts down stabilitrak, reduces engine power, etc to prevent damage. Just in case anyone was wondering.
 

·
Registered
Joined
·
264 Posts
i recently have run into the same problem. the only thing is mine is an 07, but i put a Volant Air Intake on it just under a year ago. I'm going to call the dealer tomorrow to see what they have to say. Ill most likely end up taking it in to get it looked at though. Im kinda confused tho why this happened to me because i put an aftermarket intake on it, unless its caused by something else. in addition to the service stability and service traction control, the shift between gears 1-2 are really hard. this makes me want to think its more of a computer issue/code error than a bad air intake.
 

·
Registered
Joined
·
52 Posts
Discussion Starter #5
the guy at my shop said that he's seen this problem be caused by a number of factors, but most routinely by either 1) a faulty intake or 2) computer malfunction. Have it checked out, but by the sounds of it you're going to be a quick computer update away from being problem free. Good luck
 

·
Registered
Joined
·
52 Posts
Discussion Starter #6
2 weeks and 4 shop trips later, I finally (fingers crossed) have resolution on this issue.

-- FYI: My shop said GM for the past 6 months has been getting a number of inquiries as to the nature of the problem I had. There is currently a bulletin out (not a recall), so if you have these issues I'd recommend mentioning this as a possible problem --

The Situation (along with a fist pump):
- Driving along normally, not doing anything out of the ordinary, when the engine begins with a short RPM increase, followed by a quick decrease of about 1,000 RPMs, followed by the following warning indications in this order in about 3 second intervals: Stabilitrak Disabled, Traction Control Disabled, Service Stabilitrak, Reduced Engine Power. The engine then stalls out

The Shop Trips:
1) Replace Throttle Body Sensors: Shop tech advises the codes are due to uneven airflow in the engine compartment. GM recommends a swap out of the throttle body sensors.

The same issue occurs less than 24 hours later

2) Replace Throttle Body Wiring Harness: Codes state the same problem with throttle body. GM recommends now replacing the wire harness. Step is taken by shop tech.

The same issue occurs less than 24 hours later

3) Replace vacuum hoses: Code states the same air flow problem. GM recommends replacing vacuum hoses. Step is taken by tech.

The same issue occurs less than 24 hour later

4) Replace throttle body: Code states same problems. Throttle body is ordered (but back ordered because of the demand for the part given the issue), comes in 3 days later and is replaced.

It's been 3 days and the issue hasn't happened again. I've heard it has the potential too though, and the next steps in the GM manual are replacing the Alternator, then the battery.

MJ
 

·
Registered
Joined
·
27 Posts
Hopefully that was all under warranty. Don't know why no one tests anything these days. Guess at $90 bucks an hour, best to put in new parts. I always service the throttle body every couple of years. They get gummed up like the carbs used too. Especially the Idle air control passages.
 

·
Registered
Joined
·
52 Posts
Discussion Starter #8
Yes, good point Dave -- forgot to mention all work was covered under warranty. Even pushed the rental car insurance and fuel back to GM as well.
 

·
Registered
Joined
·
1 Posts
my 2004 silverado has a reduced engine power problem. only hapens when i turn my fog lights on. it throws engine light but if i turn it off for a few mins and start it up its fine. only does it when ever i turn fog lights on, Any ideas?
 

·
Registered
Joined
·
1 Posts
I just had the same problem with my 2009 Silverado 1500 crew cab (21,000 miles). A few weeks ago had the Stabilitrak warning along with no traction control and reduced engine power. It happened twice in one day, then the service engine soon light came on . Took it to the dealer the next day, they hooked it up to the computer and it showed there was a problem, but everything checked out okay. Three weeks pass with no problems. Then, this past Sunday, it happened five times. Was driving down the interstate and had to stop about every 5 minutes - pulled over, turned the engine off for a few minutes and it would be fine. Drive 5 minutes and the same thing happened. The engine didn't stall, but it did run very rough and had no power. The next day (Monday), it happened again, 4 times within a 15 minute period. Brought it into the dealer on Wednesday and they said it was the Throttle Body sensor, but they said they just couldn't install a new sensor, they put in a whole new throttle body part. Drove home without any problems...hopefully this will have fixed it.
 

·
Registered
Joined
·
1 Posts
About 2 weeks ago my '07 Tahoe LTZ (95000+ Miles) experienced the same issue.
The Situation (along with a fist pump):
- Driving along normally, not doing anything out of the ordinary, when the engine begins with a short RPM increase, followed by a quick decrease of about 1,000 RPMs, followed by the following warning indications in this order in about 3 second intervals: Stabilitrak Disabled, Traction Control Disabled, Service Stabilitrak, Reduced Engine Power, Engine shook like a '57 Chevy. The engine then stalls out. It is was triggered by a sudden stop or decrease in speed. I took a video of the error the third time that it occurred will try to post.

Shop Trips:
1) Tune Up, 30-Point Inspection, Software Update; etc. - 7 Days Later SOS

2) Replace Sensors - Next Day SOS

3) Replace Throttle Body - Picking it up today so we will see


- Keeping my fingers crossed!
 

·
Registered
Joined
·
1 Posts
My 2009 Tahoe LTZ with 19k miles is having the same problems....I took it in for service a couple of weeks ago and they said that my error codes was p0175 and p0172 (Rich fuel) and the dealer was telling me that I put e85 gas in it when I know I didn't. My truck has this vibrating sound thats coming from the top of my engine when decelerating ( around 1k rpm) and sometimes at it will make that noise in idle. My idle is very erratic but dealership says that's normal. Last night the truck didn't drive right...felt like it had a bog during acceleration then all of a sudden the stabilitrack/engine power reduced error came on. Going to the dealership again later today...do you guys think I have a bad throttle body too?

Thanks!
 

·
Registered
Joined
·
1 Posts
My 2009 Suburban LTZ is having the same exact problem with Service Stabilitrak message and the engine shutting off. Trying to get it serviced before anyone gets injured. Very, very dangerous if you are going to be driving on the highway. Will post with resolution.
 

·
Registered
Joined
·
1,633 Posts
Hopefully that was all under warranty. Don't know why no one tests anything these days. Guess at $90 bucks an hour, best to put in new parts. I always service the throttle body every couple of years. They get gummed up like the carbs used too. Especially the Idle air control passages.
Having spent some time working with the guys who specialize in diagnostics at my local dealer, I can tell you that they don't test things because they cant afford to. When GM determines the amount of time it will take to fix a problem, they don't account for getting the required tools, or going to the parts department to get parts, fluids, etc. The result is that the service time on warranty work is almost always shorter than the time the mechanic will spend working on it. Because GM only assigns so much time, they only pay so much time. Anything over GM's specified time, and the mechanic will either be working for free or they will have to go the the service manager and request additional time, which ends up being paid by the dealer rather than by GM. Since there really is no extra time to test parts too thoroughly on warranty vehicles, the mechanic just has to follow what the GM service information tells them to do or else they won't make money.

That being said, there seem to be a few possible causes for this set of symptoms - the throttle body issues mentioned in this thread, computer issues, and I have personally seen the computer activate this same safety mode for a misfire caused by a loose wiring connector on an ignition coil.
 

·
Registered
Joined
·
264 Posts
its been forever since i posted on the site, but when i saw this email i thought i'd chime in.

my problem ended up being that my intake wasn't on all the way. I had to put in a new set of hids and i took the intake off and i didnt get it on all the way and it actually came disconnected from the intake manifold (oops). popped the hood and it was hanging from the air box. so it actually saved my engine from damaging, unfiltered air.

so a possible solution, and to maybe save a trip from the dealer, check the intake path and make sure everything is connected properly
 

·
Registered
Joined
·
1,633 Posts
Just one more thing I thought of for anyone who might be having this problem - the 2007+ trucks have the ability to detect the percentage of ethanol in the fuel that has been put into them. At the time I was working at the GM dealer, 5% was the highest that was normal here, but we worked on a few trucks that came in with these issues that when we hooked up the Tech2, they showed around 35% ethanol. I think what happens in that case is that the engine changes its timing to be compatible with ethanol fuels (to make the FlexFuel engines run better on e85 and such) but since the fuel is still normal, it doesn't run properly. When the computer detects this improper running, it goes into limp mode. A reset of the ethanol % using the Tech2 always fixed this problem and only took a few minutes.
 

·
Registered
Joined
·
1,105 Posts
I'm having this problem for about the 10th time. My dealer says its either my oiled air filter messing up the MAF. Or flooded streets makin me throw a throttle position sensor code. Any ideas what do to. I've reset my truck and tried using my iTune to clear the codes. Not sure what I need to look at first
 

·
Registered
Joined
·
6 Posts
has anyone actually found the root cause of this. this is driving me nuts.

i just finished replacing the whole throttle body and no change.

i have a 2007 silverado 5.3l flex
 

·
Registered
Joined
·
1,105 Posts
has anyone actually found the root cause of this. this is driving me nuts.

i just finished replacing the whole throttle body and no change.

i have a 2007 silverado 5.3l flex
i had this problem and it was from the water getting into my sill guard. Underneath that is the IP to body harness. Water gets into the connections and causes the throttle positioning sensors to read different causes the truck to go into a protection mode. The streets n Tuscaloosa flood like crazy when it rains. To fix it you gotta find where the water is getting in seal it up and put so electric grease in the connection. Since I have done this I haven't had any problems.
The dealer in town tried to tell me in was my kn intake so I pulled it off and put the stock one on and went back up there to show it wasn't the problem. Eventually I found some research on the Internet with a work order number. Ended up doing it myself though
 
1 - 20 of 452 Posts
Top