March 29, 2018February 11, 2019 by Rich Estill

Ugg. Another light in the dash. This time it has to do with the diesel exhaust system. I pulled a p20B9 code. Googled it and Eric at South Main Auto (in NY) made to detailed videos on how to diagnose the problem. Yup, a heater is bad. Now I need to find a part.

Ugg. Another light in the dash. This time it has to do with the diesel exhaust system. I pulled a p20B9 code. Googled it and Eric at South Main Auto (in NY) made to detailed videos on how to diagnose the problem. Yup, a heater is bad. Now I need to find a part.#diy #doityourself #autorepair #handyman #duramax #duramaxdiesel #duramaxtrucks
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