Diagnostic Aids
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.
Presence of current or history DTC's while attempting to rezero PPS will cause PPS ECU to set DTC B063. Verify all SIR and PPS DTC's have been cleared before rezeroing PPS.
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For circuit number and wire color identification, see WIRING DIAGRAMS .