Just bought a 2008 Avalanche LTZ. Cruise control did not work. Light on steering wheel came on but no light on speedometer and would not set. Read where this was a common problem caused by a faulty brake switch. Went to NAPA and bought one. After installation problem remained the same AND my dash guages and DIC no longer work. Speedometer and tach work but not temp, gas, batt or oil. Fuses are all fine for both DIC and guages????