2005 GMC Sierra V8 Four Wheel Drive Automatic 71,000 miles
Yesterday all of my brake warning lights came on with a Service Brake System Message in my display under the speedometer. Speedometer began bobbing up and down and not reading correctly. Truck didnt wanna shift, felt like a rev limiter was engaging. The truck didnt wanna get out of its own way. If I came to a complete stop all of the messages would turn off, and the truck would act fine. Then I would drive maybe 100 ft. And everything would go off again. I have been having problems with the speedometer acting funny for a few months. It would act up then be fine again. I changed my front brake pads the day before yesterday. Everything looked fine. Took truck to mechanic yesterday after everything went crazy. He said everything looked fine with the brakes and he replaced my vehicle speed sensor on the transmission. Drove truck home last night it acted fine. Drove it about 20 miles today and it did the same thing as it did yesterday.
Saturday, April 3rd, 2010 AT 1:18 PM