I've got the p21dd code, I'm over the milage to get fixed under warranty. My question is can the heater be replaced without replacing the tank also.
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Hey all, I've had my dsp5 switch information 4 year or so and it has been working fine. We'll the other day it quite. I have checked it with Efi live and the voltage doesn't change stays at 0.0 in all positions. Any help would be great. It on an 05 duramax lly