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 UnderbodyRear Side Door Window Replacement
Preliminary Procedures
Position the window approximately half way down in the door.
Remove the water deflector. Refer to Rear Side Door Water Deflector
Replacement.
Remove the outer sealing strip. Refer to Rear Side Door Window Outer
Sealing Strip Replacement.
Rear Side ...
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 ...
Exhaust Flexible Pipe Replacement (1.6L LXT)
Removal Procedure
Warning: Refer to Hot Exhaust System Warning in the Preface section.
Warning: Refer to Protective Goggles and Glove Warning in the Preface section.
Open the hood.
Raise the vehicle by its full height. Refer to Lifting and Jacking the
Vehicle.
Remove the heate ...