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 UnderbodyFront Fender Replacement
Preliminary Procedure
Remove the front bumper fascia. Refer to Front Bumper Fascia
Replacement
Remove front bumper fascia guide. Refer to Front Bumper Fascia
Replacement
Remove the wheelhouse liner. Refer to Front Wheelhouse Liner Replacement
Remove the headlamp. Refer to H ...
Installation Procedure
Cut the body lock pillar outer panel in corresponding locations to fit
the remaining original panel. The sectioning joint should be
trimmed to allow a gap of one-and-one-half-times the metal thickness at the
sectioning joint.
Create a 50 mm (2 in) backing plate from the unused porti ...
Hood Primary Latch Release Cable Handle Replacement
Preliminary Procedure
Remove the front side door sill trim plate. Refer to Front Side Door Sill
Trim Plate Replacement.
Hood Primary Latch Release Cable Handle
Procedure
Pull down the hood primary latch release cable handle.
To release the handle, pull down the cable and unhook ...