Originally Posted by Chevrolet Customer Service

Julia Garcia,

I'm sorry to hear of your frustration with your Tahoe. Has your dealer been able to duplicate this problem? Does the transmission only shift hard/lose power when the TC light is on? Do the warning lights stay on or do they come on intermittently? Have you had any aftermarket equipment added to the vehicle (i.e. different size wheels/tires, etc.)?

Could you please PM me your vehicle VIN number so I may research your vehicle further. I may be able to provide additional information.

I look forward to your reply.

Louis
GM Customer Service

Originally Posted by Chris Stacker

Can you update what happened? I just did the same thing and have the same issue in my 2013 Tahoe. Hit a curb, blew a tire...replaced tire but the ABS, TPMS, Stabilitrack and Traction Control lights are all on. How did you fix?

Originally Posted by Jon Broyles

I purchased a 2014 GMC Yukon XL SLT.

96k miles on it. A week ago my wife was driving when all of a sudden she had a severe loss of power with the check engine light coming on along along with the stabilitrac light and traction control light. Mechanic said its showing an error code in cylinder 7. We took it to our local mechanic and we/they can not find the problem and I feel like we’re going down a rabbit hole. We have done the following trying to chase the problem:

- new spark plugs and wires
- new fuel injector on #7
- they tested the engine to make sure cylinder is working properly and engine pressure (all is good)

.....they said that the spark plug doesn’t look like it’s getting fuel (but it is sparking). They now feel that the problem leans towards electrical (wiring harness?). The mechanics said they need some time to review electrical diagrams to try and trace it back.

I’ve spent hours reading posts online and it seems like it’s a reoccurring problem.

Some things that have been recommended:

- ground wires (damaged or loose)
- check fuse tied to fuel injector
- air intake crack
- bad wiring harness
- mass air flow sensor
- injector receiving the right power, fuse?
- AFM lifter
- airflow sensor
- reset the PCM
- one of the banks on the air/o2 sensor

any thoughts?

Originally Posted by keithwarfield601@aol.com

i replaced spark plugs and wires and this seems to have solved the problem. Its only been 8 hrs but all is well so far.

Originally Posted by gilstone

Every time I start my '07 Burban (even sitting at idle) the bell starts chiming and the triangle sign and the warning reads "service stabilitrak" then "traction control (off)" activates within a few seconds. This keeps going on and off as I am driving and when its in the off position the trans shifts gears very hard. Looking trough the "www.chevroletforum.com" site, I can see that this had been a problem in the past with 2003 and up, and there are many people talking about this issue with their trucks, but I have not come across anyone who can give the answer on how to resolve this problem. HELP!!!

Thank you!

Originally Posted by Misty Marie

I had this issue with my truck. Started after I had my rear shocks replaced so maybe something came loose under there. My uncle replaced the fuel pump control module and all these problems went away. It is located at the back of the tahoe above the spare tire.

Originally Posted by repairman54

Unless you can read the codes in all the 4 code ''families'' it's just a guess to any repair. Knowing what codes are stored can point to the repair or at least help make an educated guess. It's a computer with tires today.

Originally Posted by 91Caprice

I've had this happen a few times. Once was because the intake tube where it attaches to the throttle body was not on there secure enough. Another time it's because I accidentally unplugged one of the connections over the rear driver side shock when I replaced the shocks. The other time the Throttle Body needed to be replaced which apparently is a common problem with these 07-12 full size trucks.