Intermittant gear shift problem

GMC guy

Hero Member
Joined
Feb 16, 2008
Messages
327
Likes
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Points
16
#1
Make
Gmc
Model
C5500
Year
2005
Miles
180k
Engine
6.6 diesel
Hey all. I have a 20005 gmc top kick c5500. It has the caterpillar 4 speed tranny. It sometimes does not go into reverse. The reverse light indicator just blinks but no revererse. I have to shut the truck off and start it, then it goes into reverse. The truck also goes into forward gear but at times, not shift from first to second. I have to shut truck off again and once started, it will shift. Help!