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 UnderbodyHow to Wear Safety Belts Properly
This section is only for people of adult size.
There are special things to know about safety belts and children. And there are
different rules for smaller children and infants. If a child will be riding in the
vehicle.
Follow those rules for everyone's protection.
It is very important for ...
Hands-Free Phone
Using Bluetooth Voice Recognition
To use voice recognition, press the
button on the steering wheel.
Use the commands below for the various voice features. For additional information,
say “Help” while in a voice recognition menu.
Making a Call
Calls can be made using the following commands.
...
Removal Procedure
Warning: Refer to Approved Equipment for Collision Repair Warning in
the Preface section.
Disable the SIR System. Refer to SIR Disabling
and Enabling.
Disconnect the negative battery cable. Refer to Battery Negative Cable
Disconnection and Connection.
Remove all related panels and co ...