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Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 29534
Experience:  GM Grand Master Technician 2007. 14 years experience.
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I have a 2003 Duramax diesel 2500 HD and my check engine

Customer Question

Hi I have a 2003 Duramax diesel 2500 HD and my check engine light will come on When pulling my 5th wheel when I drop the 5th wheel the cel will go away.had it checked and it has a code PO234
Submitted: 1 year ago.
Category: Chevy
Expert:  GM Tech (Cam) replied 1 year ago.

Hi there, I am Cam?

While I pull up some information can you get me your first name please?
Can you also tell me if your truck has a chip or anything aftermarket installed?

Expert:  GM Tech (Cam) replied 1 year ago.

Also due to different emissions systems (california vs federal) I need to know your VIN please.

Customer: replied 1 year ago.
Danny, No chips
1gchk23113f106780
Expert:  GM Tech (Cam) replied 1 year ago.

Danny so are you looking to diagnose this yourself or just getting a sense of the issues it could be? This could be a charge air cooler issue, boost sensor, turbo, waste gate actuator.....

attached is the chart for diagnosing this code, can you look through it and see what your thoughts are.

Expert:  GM Tech (Cam) replied 1 year ago.

I would look primarily at the charge air cooler lines, wiring and the boost sensor. Its replacement instructions are below.