code c0265

Double check the following grounds on your 2001 GMC Jimmy: Battery cable to engine block, battery cable to frame and ABS module ground. If these connections are all clean and tight you may have a faulty ABS control module. The C0265 is for a fault with the ABS pump relay which is part of the ABS module. The ABS control module ground should be a larger black wire attached to the frame near the ABS module.