2.8L LK5 3.5L L52 Engine - DTC P0621 P0622 - kw battery indicator

When servicing the vehicle with the VIN you entered, the following diagnosis might be helpful if the vehicle exhibits the described symptoms.

DTC P0621 and/or P0622. Battery charge indicator illuminated on IPC.

If DTC is current run published diagnostics.

If published diagnostics does not isolate the root cause, or the DTC cannot be duplicated, reprogram the PCM with the latest calibration found in TIS version 4.5 or greater which was broadcast on 4/17/04.

.

Please follow this diagnosis process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance. This diagnostic approach was developed for the vehicle with the VIN you entered and should not be automatically be used for other vehicles with similar symptoms.

(04 Chevrolet Colorado) and (04 GMC Canyon)

.