Join Date: May 2007
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GMC C6500 automatic trans "range inhibit" light
I have a 2001 gmc c6500 with an allison automatic trans. I have had a few things happen that I'm not sure of and hope someone here knows about.
The first and I think this is minor, was last week after the truck had sat about a month( started reguarly but not moved) I put it into drive and nothing happened---so I shifted into reverse then to drive and everything was ok.
Today after unloading the truck I got in, shifted from neutral to drive and nothing, but this time I got a "range Inhibit" light. After shifting to reverse and back to drive light went out and transmission went into gear.
What does the range inhibit light mean. Other than that the trans shifts fine when driving. This is the first truck I've had with an auto trans.