the modulater on a 90 shevy silverado is located under the dashboard mounted on the steering colum
No there is not.
That year did not use them. It is electronic controlled transmission.
That transmission does not have a modulator valve on it. It is computer controlled to a point.
If your speaking of the vacuum modulator for the transmission, they no longer use them on the transmissions with overdrive and electronics. The powerglide, turbo 350 and turbo 400 used to use them.
In the fuel tank.
It is mounted on the top of the starter.
spell check your answer
it has throttle boddy
1990 through 1998
If you mean a low fuel light, then NO.