Cruise Control Diagnostic System Check
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2000 GMC Yukon XL, 2000 GMC Yukon, 2000 GMC Sierra, 2000 Chevrolet Tahoe, and 2000 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.
- Following manufacturer's instructions, install GM Tech II scan tool to Data Link Connector (DLC). If scan tool powers up, go to next step. If scan tool does not power up, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
- Turn ignition switch to ON position. Following scan tool manufacturer's instructions, attempt to establish communications with PCM. If communications can be established, go to next step. If communications with PCM cannot be established, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
- Select powertrain control module display function on scan tool. If any DTCs starting with "P" are displayed, go to appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. Ensure all engine performance DTCs are corrected before proceeding. If no DTCs are displayed, go to SYSTEM OPERATION CHECK under TROUBLE SHOOTING.