I have an '06 Sierra W/T with a stock AM/FM radio, no extra gadgets, auto-volume, GPS, LCD screen. The driver information display is part of the instrument cluster.
Can I remove it without affecting the computer? The highly trained rocket scientist at Cicuit City said for _all_ new cars you need to purchase an intermediate harness ($135) or else the truck won't run.
I could see where removing the radio on a Lucerne could cause fault codes but on a Sierra W/T?