99 Silverado

Tiny
BADBRADH
  • MEMBER
  • 1999 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 139,000 MILES
99 silverado. 4 low works but nothing happens when I push 4 high. Any ideas? Actuator or switch?
Monday, December 27th, 2010 AT 9:07 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,328 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.
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Tuesday, January 25th, 2011 AT 1:39 AM

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