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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 1693
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I have a 2009 GMC Sierra 4X2 crew cab short bed 4.8L engine.

Customer Question

I have a 2009 GMC Sierra 4X2 crew cab short bed 4.8L engine. My transmission is not shifting into 4th gear while in D. It shifts great from low to second, then second to 3rd, but not into 4th. No codes no lights. What does it sound like to you. Thanks
Submitted: 1 year ago.
Category: GMC
Expert:  Gm Tech (Cam) replied 1 year ago.

hi there, I am Cam. Prior to changing the fluid, what colour was the fluid?

Please be very specific in the shade, base colour, if there was debris in it and the smell.