Having problems with your 1999 GMC Sonoma ?
99 sonoma 4wd actuator has vacuum whether in 2wd. or 4wd.is the actuator switch faulty ?
\015 Had no 4wd. found actuator hose off.noticed hose had same vacuum whether in 2wd or 4wd. could this be a bad actuator switch at tras. case ?\015
Repair Help & Product Troubleshooting for 1999 GMC Sonoma
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