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Well maintained. Highway miles. Oil change @ 50% oil life as posted on on board computer? Suggestions?

 

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Also note: GMC Serria 2500 HD, early 2004. Injectors were a factory replacment @50,000.

 

[ob_1jr]

I would talk to your dealer and see what they say. Most people are getting the injectors covered under the special policy for the 01-03. (even the 04s since they are the same injectors) 7yr/200,000 miles. It sounds like another set of injectors to me. How is your coolant level. Does your truck pressurize the overflow tank after running for a short time? How about after sitting overnight?