Scan Tool Does Not Communicate with Class 2 Device (W/O Immobilizer)

WARNING: This page is about a different car, the 2003 Oldsmobile Bravada, 2003 GMC Envoy XL, 2003 GMC Envoy, and 2003 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Scan Tool Does Not Communicate with Class 2 Device (W/O Immobilizer) - Diagnostic Chart (1 Of 4)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Scan Tool Does Not Communicate with Class 2 Device (W/O Immobilizer) - Diagnostic Chart (2 Of 4)

Courtesy of GENERAL MOTORS CORP.

Fig 3: Scan Tool Does Not Communicate with Class 2 Device (W/O Immobilizer) - Diagnostic Chart (3 Of 4)

Courtesy of GENERAL MOTORS CORP.

Fig 4: Scan Tool Does Not Communicate with Class 2 Device (W/O Immobilizer) - Diagnostic Chart (4 Of 4)

Courtesy of GENERAL MOTORS CORP.