Question about 2003 GMC Sierra 1500
Loud grinding noise starts around 20 to 30 mph. Sounds as if transfer case trying to engage. I am wanting to do something so I can drive it to a transmission shop for diagnosis - thanks
Don't attempt any more driving get it towed or more damage could /will be done
Posted on Nov 21, 2014
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Posted on Jan 02, 2017
SOURCE: four wheel won't engage
Theres a vacume dash pot under the battery box. It pulls a cable that engages the front diff. Put the vacume line and you'll have lights and four wheel drive. (it happened to my blazzer)
Posted on Dec 29, 2008
try going into reverse for 10 feet then go to drive for 10 feet that might help if not it is to the wiring to you 4x4 engage system (wires to your wheel hub)
Posted on Jul 04, 2009
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