Originally Posted by GMPX The Cummins ECM's have been a real learning curve, it makes the Duramax's Bosch ECM look logicals HAHA!!! What!!??
2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison12.9s @ 108 mph many thanks to Ross and Paul
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Originally Posted by GMPX
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