Is there a modulator valve on my 2000 GMC jimmy

Asked by Aug 22, 2015 at 06:29 AM about the GMC Jimmy

Question type: Maintenance & Repair

1 Answer

143,245

There are several. "Modulator Valve" just means a type of vacuum switch. There is one on the transmission, one on the EGR on the engine, the fuel rail, and another on the brakes, and more.

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