Re: code reader for GM

I would suggest going out and getting a copy of the CHILTON manual for that
particular car.

I have a '94 Chevy Blazer and have to read the codes myself. For my
particular model
I just jumper pins 1-2 with the ignition OFF. When I turn the key to the ON
position, the
'check engine' will start to blink giving you the error code. The pattern
varies with the
problem, and the Chilton's manual will have the codes listed.

This is a quick way to determine what the computer has in it's memory.

Craig
"Jon G." <jon8338@peoplepc.com> wrote in message
news:hxyhd.14900$5i5.1496@newsread2.news.atl.earth link.net...
> I have a 94 Pontiac Bonneville. The check engine light goes on
> sometimes. At idle, the oil pressure oscillates up and down.
> The check engine light usually goes on after going high speed
> and slowing down to a stop.
>
> I have tried to find a code reader for it. The connector is
> trapezoid (D-shaped). This is supposed to mean that the
> computer is OBD II, but since the car is a 94, it was during a
> hybrid year and needs a OBD I to OBD II adapter.
>
> Can anyone tell me a way to read the codes?
>
> Jon