Diagnostic Trouble Code (DTC) List

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Yukon, 2003 Chevrolet Tahoe, 2003 Chevrolet Suburban, and 2003 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Diagnostic Trouble Code List Table (U1000 To U1133)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Diagnostic Trouble Code List Table (U1151 To U1305)

Courtesy of GENERAL MOTORS CORP.