StabiliTrak And Traction Control Is Standard Equipment - keywords ABS brake code DTC EBCM EBTCM JL4 JL9 light message module TCS VSES

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

StabiliTrak (VSES) and traction control (TCS) are standard equipment on the models listed above. Since these are standard equipment, the RPO code JL4 may not be listed on the Service Parts Identification Label.

Please follow this diagnostic or repair 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.