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Ask Gm Tech (Cam) Your Own Question
Gm Tech (Cam)
Gm Tech (Cam), GMC Mechanic
Category: GMC
Satisfied Customers: 29521
Experience:  GM Grand Master Technician 2007. 14 year experience.
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I have a 2006 GMC Duramax "LBZ". The transmission will not

Customer Question

I have a 2006 GMC Duramax "LBZ". The transmission will not shift into overdrive. I get an error code which states that my fuel rail pressure is to low. Do I have a fuel rail problem or a transmission problem? tks
Submitted: 1 year ago.
Category: GMC
Expert:  Gm Tech (Cam) replied 1 year ago.

Hi there, I am Cam. Can I get your first name please?

I have yet to see a fuel pressure issue prevent the transmissions from shifting into reverse. Has that happened the whole time or was it not shifting prior to this?
What is the condition of the transmission fluid?
Was the code a P0087?

Customer: replied 1 year ago.
We found out there was an obstruction in the fuel line coming from the fuel filter.
Expert:  Gm Tech (Cam) replied 1 year ago.

That would do it. Do you need more assistance?