Diagnostic Procedure

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 GMC Yukon XL, 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Suburban, and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: DTC P1518: Throttle Actuator Control Module Serial Data Fault (Steps 1-8)

Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC P1518: Throttle Actuator Control Module Serial Data Fault (Steps 9-16)

Courtesy of GENERAL MOTORS CORP.

Fig 3: DTC P1518: Throttle Actuator Control Module Serial Data Fault (Steps 17-25)

Courtesy of GENERAL MOTORS CORP.

Fig 4: DTC P1518: Throttle Actuator Control Module Serial Data Fault (Steps 26-29)

Courtesy of GENERAL MOTORS CORP.