Yeah, well not for nothing, but this basic new car 101 info was SO hard to find in the owner's manual it took me half the morning to figure it out. GM's documentation is a bit of a facepalm at times. I called Onstar, they transferred me to Chevrolet and it took THEM a long time to answer this painfully simple question.

 

Oy Vey

 

Heres the answer. Just touching the start button without your foot on the brake does not put the car into accessory mode.
You must hold the button down 7-10 seconds, and then wa-la, acc mode is on.
You will be able to tell, as lots more lights in the dash come on, etc.

i had had to figure this out tonight, to get my accessory gauge to be able to turn on the ic pump manually... it's the c7z06 NorCal gauge.

Andy

 

ACS55: you just put your car into Service Only Mode, not Accessory mode (which only requires the start button to be pressed w/o clutch or brake depressed).

They are not the same thing, at all. Service only mode is basically the same as "On" in keyed ignitions, and you can do virtually all the same things that you can do when the engine is running, including running codes.

Make sure to exit this mode, because it will not time out like Acc. will.

 

I agree; the manual is very poorly written. I just got my C7 Grand Sport and I intend to just play with the options to see how things work, and try to use some common sense to figure things out. My thought is to push the start/stop button without depressing the clutch should work because it is "parallel" process to the automatic by pushing the start/stop button without depressing the brake. I suggest you invest in a remote speaker, and listen to internet radio while you clean your car. That is what I do.

 

It's pretty simple.

Pressing the button quickly turns accessory on for 10 minutes after which it powers down. Holding the button down does the same thing but puts it in "service" mode, and it doesn't time out until you turn it off by pressing the button again or until the battery dies.

That's why you're getting different answers, but both are correct.

 

Threads like this go on and on because people answer the wrong question, then it evolves into a totally different discussion.
Note that there is a difference in accessory mode and diagnostic mode that turns the whole car on without starting. Press once for accessory, press and hold for diagnostic with foot off of clutch for manual and off brake for automatic.

 

Press the button without pressing brake (or clutch)

 

You'll kill the battery before you get to dry the car. Don't murder your battery just to have tunes while you clean the car.

Elmer

 

Foosh is correct (as is normal).

 

Guys, all (or nearly all) push button start systems work the same. So I'm unsure how this is difficult.

There are really only one difference. Do you have the "rotating" button (Chrysler does this) or do you have the "hold" button (GM and Ford do this).

1. When a car is off, regardless of type, a single press with a foot on the brake (or clutch) will start the car.
2. When a car is off, regardless of type, a single press WITHOUT a foot on the brake (or clutch) will put the car in Accessory.
3. When a car is ON, regardless of type, a single press when the car is stationary will turn off the car.
4. When a car is ON, regardless of type, HOLDING the button when the car is moving will turn the car off (after 5 seconds usually)

Now to get into Run mode without engine on is where they differ. In a classic key system this would be 2 detents in (before you crank). The car is technically fully on, just there is no engine crank and so the engine does not start.

1. When a car is off, if you have the "rotating" type, hit the button TWICE. The first press gets you into Accessory. The second press gets you into Run.
2. When a car is off, if you have the "hold" type, HOLD the button for 5 seconds. This will put the car directly into Run, bypassing Accessory.

When in Run or Accessory (on "hold" cars) you can hit the button again to turn the car off, or put your foot on the brake (or clutch), regardless of type, and start the car.