99 silverado

1999 CHEVROLET SILVERADO
139,000 MILES • V8 • 4WD • AUTOMATIC
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BADBRADH
  • MEMBER
  • 1 POST
99 silverado. 4 low works but nothing happens when i push 4 high.any ideas? actuator or switch?
Dec 27, 2010 at 1:07 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,246 POSTS
Check to make sure the plug on the 4wd actuator is tight and not corroded. Make sure you are getting power to the actuator when you shift. If you are getting power, remove the actuator and check it for operation.
Jan 24, 2011 at 5:39 PM
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