Question about 1999 GMC Sierra
The 4x4 didn't work for my 2002 F350 diesel. After some checks, I replaced the vacumm solenoid, which fixed the problem.
After a week, the 4x4 is no longer working again. The dash light does come on, but the hubs don't lock.
What has gone wrong? The solenoid couldn't have gone in a week. Is something else the problem?
Jump start a 200 F300 ford truck
Posted on Apr 29, 2011
Check to see if you can still turn the hub lock outs by hand (if app) My guess would be not. They probably need to be replaced or taken apart and re-greased.
Posted on Mar 03, 2009
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