Question about 1999 GMC Sierra 3500

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Gmc turbo we have replaced injectors and turbo. turbo is not spooling up. There is no vacum . I think the previous owner might have removed when turbo went bad. Can anybody tell me where the vacum line from the turbo should tie in

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There is 1 or 2 vac solenoid on driverside rear of valve cover.
if there is only one then that one connects to the vac pump and wastegate actuator on turbo. if two vac solenoids,then other one goes to EGR valve on intake cover.

Posted on Jul 12, 2008

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