Mechanics

4X4 LOW SELECTOR

2002 GMC C2500

Transmission problem
2002 GMC C2500 V8 Four Wheel Drive Automatic 50000 miles

Allison auto drive selector
When I push this button it blinks but will not engage.
returns to 2 wheel drive or to high 4X4. Has been like this for several months. Does not appear to affect high 4X4. Is this a large or small repair. Can I cause damage if not repaired?
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Reg C
December 3, 2007.



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