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 UnderbodyInstallation Procedure
Align the rear side door outer panel.
Verify the fit of the rear side door outer panel.
Clamp the rear side door outer panel
into position.
Pre-flanging the flange with BO-6396 pliers and BO-6392 tool kit .
Continue to hammer in stages along the hem flanges.
App ...
Loss of Control
Skidding
There are three types of skids that correspond to the vehicle's three control
systems:
• Braking Skid — wheels are not rolling.
• Steering or Cornering Skid — too much speed or steering in a curve causes tires
to slip and lose cornering force.
• Acceleration Skid — too much thro ...
Anti-Corrosion Treatment and Repair (Base)
Warning: When applying sound deadeners, or anti-corrosion materials
due care and preventative measures must be exercised to prevent
any material from being sprayed into door and quarter panel mechanisms such as
door locks, window run channels, window regulators and
seat belt retractors, as wel ...