I have a 96 K1500 last night my check engine light came on, all gauges are
reading normal and there is no obvious loss of power, or no weird sounds
coming from the truck.
This has happened in the past and gone out a few days later but used to come
on when at extreme highway speeds, last night I was only doing about 30 mph
when it happened.
Is there any way to read the code without a code reader. I know on the older
ones like a 92 Jimmy I had all you had to do was short out the last two
contacts on the upper row of the plug under the dash. Turn the key on and it
would flash the codes. Is there any short cut to take or suggestions of what
it could be?

Thanks