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 UnderbodyEngine Oil Life System
When to Change Engine Oil
This vehicle has a computer system that indicates when to change the engine oil and filter. This is based on a combination of factors which include engine revolutions, engine temperature, and miles driven.
Based on driving conditions, the mileage at which an oil ...
Rear Brake Rotor Replacement
Special Tools
CH 41013 Rotor Resurfacing Kit
CH 42450-A Wheel Hub Resurfacing Kit
For equivalent regional tools, refer to Special Tools.
Removal Procedure
Warning: Refer to Brake Dust Warning in the Preface section.
Remove rear brake caliper bracket. Refer to Rear Brake Caliper Br ...
Steering Linkage Outer Tie Rod Replacement
Preliminary Procedure
Remove the tire and wheel assembly. Refer to Tire and Wheel Removal and
Installation.
Steering Linkage Tie Rod Nut
Caution: Refer to Fastener Caution in the Preface section.
Tighten
35 N·m (26 lb ft)
Steering Linkage Inner Tie Rod Nut
Tighten
60 N·m (44 ...