This information provides repair recommendations and general guidelines for steel classified as Ultra High Strength Dual Phase Steel (Dual Phase Steel with a tensile strength greater than 800 MPa), also known as DPX.
General Motors recommends the following when repairing or replacing this type of steel during collision repair.
Note:
Recommended Repairs:
Special Tools and Equipment

Mild Steel
Frame and UnderbodyStrut Assembly Replacement
Special Tools
CH 49375 Wrench
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Raise and the vehicle. Refer to Lifting and Jacking the Vehicle.
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation.
Separate the brake hose ...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in the
Preface section.
Warning: Refer to Glass and Sheet Metal Handling Warning in the Preface section.
Disable the SIR System. Refer to SIR Disabling
and Enabling.
Disconnect the negative battery cable. Refer to ...
Driver or Passenger Seat Side Inflatable Restraint Module Replacement
Warning: Refer to SIR Inflator Module Handling and Storage Warning
in the Preface section.
Warning: Following the deployment of a side impact air bag, inspect the
following parts for damage. Replace these parts if
necessary:
The seat cushion frame
The seat recliner, if equipped
T ...