DTC Parameters
WARNING: This page is about a different car, the 1999 GMC Sierra and 1999 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Voltage supplied to the module must be in the normal operating voltage range (approximately 9-16 volts). If a Class 2 message that the module expects to receive is not detected on the data link, DTC U1255 will be set.