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Where is the modulator valve on a 1990 Chevy Blazer?

The modulator valve on a 1990 Chevy Blazer is usually located on the transmission or on the transmission fluid lines near the transmission. It is commonly found mounted on the passenger side of the transmission case, near the transmission pan. It is typically a small cylindrical-shaped component with two or three metal lines connected to it. To locate it, you can follow the transmission fluid lines from the transmission to find where they connect to the modulator valve.