GM "C" Series Engine Wiring Problems & Parts Availability

 

GM "C" Series Engine Wiring Problems & Parts Availability

1) Do you have any 2007 or newer GM "C" series chassis with Duramax diesels in your fleet?
2)If so, are you experiencing any maintenance problems with fuel injectors, engine wiring harnesses, or any other maintenance issues?
3)Are you experiencing diffuculties locating parts, maintenance services and trained personnel to perform repairs?

Anonymous (not verified)
Anonymous's picture

We have several (15+) 4500 and 5500 Chevrolet Cab and Chassis with Duramax and Allison Transmissions, '07, '08, and '09. The only issue we see is since the GM debacle there are issue with dealers to perform warranty in some of smaller locations. Parts have not been an issue but we have almost no downtime.

Anonymous (not verified)
Anonymous's picture

We have sevaral GMC T series (100+) and we have had problems with injectors, oil coolers, and fuel tanks as we are in the north rust belt. The injector problem could be due to an issue we had with NAPA, there fuel filter did not meet oem spec and was to large a micron rating, we found this out a couple months back. We are not sure this is the whole reason behind it or not and NAPA said they are correcting this, we have switched back to OEM filters (Isuzu). Parts are becoming harder to get fuel tanks were unavailable so we had aluminum ones custom made as the orignal would only last 3-4 years and then rust out. I hear they are available again but more expensive than the custom. As for oil coolers we would get oil in the water mainly on the 04-06 model we narrowed it down to the cooler and when we ordered them we found they had changed the O-ring boss in the internal mounting. We were also told some hoses are no longer available.

Anonymous (not verified)
Anonymous's picture

 

We have (11) 2008-2009 model 4500 serires, we have been fortunate that we have only one fuel related problem and it appears to have been contaminated fuel. no injector problems as of yet. if you are have injector problems you may want to verify the micron rating of the fuel filters you are using.
our local dealer is part of the Rick Hendrick Enterprise and so for, have been giving us exceptional parts and service.
"1) Do you have any 2007 or newer GM "C" series chassis with Duramax diesels in your fleet?
2)If so, are you experiencing any maintenance problems with fuel injectors, engine wiring harnesses, or any other maintenance issues?
3)Are you experiencing diffuculties locating parts, maintenance services and trained personnel to perform repairs?"