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cobiaman 08-25-2005, 05:44 PM Just bought 05 2500hd, calibrated speedometer for 35 inch tires with predator(running 65 hp), now every so often the service brake light comes on. Is this form the change, and how do I get rid of it? Thanks, Rick 2500 HD, predator, 6" fabtech lift, MKW 18 " rims, 35/12.5/18 cooper disc SST tires, MBRP cat back 301 duals, dmax lover 08-25-2005, 05:57 PM On my '03, the service brake light would occasionally come on right on startup. I found that this only happened if I had my foot on the brake during the startup. I turned the truck off - removed my foot from the brake and started again and no light. Another tech here - "gmdieseltech" - previously posted that he fixed this issue in many cases by checking the ground wires - removing paint/cleaning the ground and tightening up the ground wires. When taking it in for service - I asked the advisor to have the tech check the grounds, etc. - I don't think they ever did... jeff | ||