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Old 01-05-2011, 09:29 PM
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stodg43 stodg43 is offline
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Default injector problem 2003 dmax

I have talked to other 2003 Chevrolet/GMC Duramax (LB7) owners and have heard that the injectors go out and cause problems. Does anyone have a fix for this before mine goes out. Cost of injectors is HIGH I have been told. Can someone answer this problem for me.



Last edited by stodg73; 09-18-2012 at 08:27 PM.
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Old 01-06-2011, 09:44 AM
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Well, considering you are out of warranty you have a couple of options from what I have found out. The dealer will charge somewhere around $1000 to replace one injector, but my understanding is that O'Rielly's Auto has injectors for the LB7 for about $285 each. NAPA also has them for about $340. I just looked at both websites and that was they had. However, just because a bunch had injector issues doesn't mean you will. If an injector fails you can drive it to get it home even though it may smoke real bad just don't push it by towing or racing.
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Old 01-06-2011, 09:51 AM
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One of the main causes for injector failure is bad fuel filtration. The stock fuel filter gets full quickly and particles get by the filter. Some suggestions are to get an aftemarket fuel filter to filter down to 2 microns, or smaller if possible. The reason behind this is that the pressure being generated by the injection pump is around 28,000 to 30,000 psi and the particles are cutting the injector internals apart.
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duramax injector problems, injector problems, lb7 injector, lb7 injector problem

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