GMC Troubleshooting Questions? Ask a Mechanic for Answers
Hi there, I am Cam. Can You tell me your first name please?I am sorry to hear about this issue, I know its frustrating. Lets see what we an do.I do deal with this a great deal in the dealership so lets see.On yours, does it ever set a code even in history?
OK, most recently did they try to scan for history codes? These will not leave the check engine light on but will still be stored in the computer.
IF they cannot provide codes, even history then perhaps we need to get the device that can do this. Its not expensive, and reads everything from 1996 and up. Its called a BLUEDRIVER. It sells for 99$ on amazon and uses your smart phone or tablet.Did they list code numbers? Because the stability system is tied into the computer, we must have the codes.
Understood, but you did not list the code numbers most recently set. There are about 15 for the throttle body and 4-5 for EACH oxygen sensor. I want to help you and the only way I can is to know exactly what code. That is why I suggested that device, its not specific to GM, its EVERY passenger vehicle from 1996 and up, so it willa allow you to get code numbers and its not limited to just this issue. You can use it for future issues.
OK, So if we can get those codes, I can help you. I Am sorry this is the case, but with the computerized systems, we need to know what they say. This is why I suggested the code reader. Then you own it.
There are MANY codes that can. Sorry for saying this but its unfair of you to assume that I SHOULD KNOW exactly what is causing it. Yes I have ideas, but with your dealer saying they have already done that, we have to look deeper.
Its like calling your doctor and saying "I Hurt or I'm sick" and asking whats wrong without any more info.
I am sorry to be so blunt but that’s where we are at. These are VERY complex vehicles with every aspect controlled by the computer. Without info from that computer, I can only suggest very basic or al encompassing repairs that would be, well quite frankly a guess and would waste your money if they did not work.