GM Service Manual Online
For 1990-2009 cars only

Circuit Description

These DTCs are listed in the software for the 2006 XLR 4.6L LH2, but the fuel pump control module was removed for this application. The DTCs will only appear in the DTC Not Run Since Code Clear List. Do not attempt to diagnose or run these DTCs.

DTC Descriptors

This diagnostic procedure supports the following DTCs:

    • DTC P0627
    • DTC P1251
    • DTC P1252
    • DTC P1253
    • DTC P1254

Diagnostic Aids

These DTCs are not supported for the 2006 4.6L LH2 applications. These DTCs may appear in the DTC Not Run Since Code Clear List. Attempting to run these DTCs will result in misdiagnosis. The appearance of these DTCs in the DTC Not Run Since Code Clear List does not indicate an issue with the ECM.