Power Steering Lock Up

No recall but there is a tech bulliten, it has to do with a code C0900 and needs to be scanned first. but here's the TSB:
Loss of Power Steering Assist, Power Steering Warning Message Displayed in DIC, IPC/Radio Displays Erratic, DTC C0900, B1325 Set (Replace Ignition Coil/Module Assembly and Add Ground Strap) TECHNICAL SERVICE BULLETIN Reference Number(s): 08-02-32-005, Â Date of Issue: Â May 12, 2008 Related Ref Number(s): 08-02-32-005 ARTICLE BEGINNING CONDITION Some customers may comment on a loss of power steering assist at high RPM (above 3500 RPM) and a power steering warning message displayed in the DIC. They may also comment some instrument/radio displays are erratic. Upon investigation, the technician may find DTC C0900 set. If the displays were erratic, then DTC B1325 will also be set. CAUSE This condition may occur when the system voltage exceeds 16 volts for one second for code C0900 and the system shuts down to protect it from over-voltage operation. If the voltage exceeds 18 volts for five seconds for code B1325, then other electronic systems protect themselves and shut down. It has been found that this voltage increase is caused by an interaction between the alternator and the ignition coil/module assembly. CORRECTION Replace the ignition coil/module assembly and add ground strap following the procedure below. 1. Disconnect the ignition coil electrical connector. 2. Disconnect the left side spark plug wires from the ignition coil. 3. Disconnect the right side spark plug wires from the ignition coil. 4. Remove the four bolts attaching the ignition coil to its mounting bracket and remove the ignition coil. 5. Remove the ignition coil from the mounting bracket. 6. Loosen the two lower ignition coil mounting bracket nuts. 7. Remove the two upper ignition coil mounting bracket bolts and discard. Fig. 1: Locating Ground Strap & Washer Courtesy of GENERAL MOTORS CORP. Press Ctrl+F to find exact text Affected Model (s): 2004-2006 Chevrolet Malibu, Malibu Maxx; with 3.5L Engine (VINs 8, N - RPOs LX9, LZ4) Page 1 of 2 8. Install the ground strap (1), P/N 12581176, to the upper left side of the bracket as shown between the coil bracket and intake. Install the new bracket bolt, P/N 11570082, (do not tighten at this time). Prior to installing the ground strap, remove the captured nut and washers. They are not needed (simply pound them out with a hammer on a vise). 9. Install the washer (2), P/N 02436162, to the upper right side of the bracket between the coil bracket and intake. Install the new bracket bolt, P/N 11570082, (do not tighten at this time). Tighten: Tighten all the ignition coil bracket bolts and nuts to 25 N.m (15 lb ft). 10. Install the new ignition coil to the mounting bracket. Fig. 2: Installing Ground Strap To Coil Courtesy of GENERAL MOTORS CORP. 11. Install the other end of the ground strap to the coil as shown and secure using a new bolt, P/N 11588715. 12. Install the other three ignition coil bolts. Tighten: Tighten the bolts to 10 N.m (89 lb in). 13. Connect the right side spark plug wires to the ignition coil. 14. Connect the left side spark plug wires to the ignition coil. 15. Connect the ignition coil electrical connector. PARTS INFORMATION Parts Information WARRANTY INFORMATION For vehicles repaired under warranty, use: Warranty Information Part Number Description Qty 12595088 Coil Assembly, Ignition 1 12581176 Ground Strap 1 11588715 Bolt 1 02436162 Washer 1 11570082 Bolt 2 Labor Operation Description Labor Time J7717* Replace Ignition Coil and Add Ground Strap 0.5 hr *This is a unique labor operation for bulletin use only. It will not be published in the Labor Time Guide.

I see the bulletin but these cars had problem with the steering motor, here is how to fix it by replacing the unit. Check out the diagrams (Below). Please let us know what happens.

I did find a TSB on the issue which as follows

REPORT RECEIPT DATE: February 04, 2015

NHTSA CAMPAIGN NUMBER: 15V064000

COMPONENT(S): Steering

POTENTIAL NUMBER OF UNITS AFFECTED: 69,633

ALL PRODUCTS ASSOCIATED WITH THIS RECALL:

VEHICLE MAKE MODEL MODEL YEAR(S) Chevrolet Malibu 2006-2007 Chevrolet Malibu Maxx 2006-2007 Pontiac G6 2006-2007

DETAILS:

5 Associated Documents

MANUFACTURER: General Motors LLC.

SUMMARY:
General Motors LLC (GM) is recalling certain model year 2006-2007 Chevrolet Malibu and Malibu Maxx vehicles manufactured April 1, 2006, to June 30, 2006, and 2006-2007 Pontiac G6 vehicles manufactured April 18, 2006, to June 30, 2006. In the affected vehicles, there may be a sudden loss of electric power steering (EPS) assist that could occur at any time while driving.

CONSEQUENCE:
If power steering assist is lost, greater driver effort would be required to steer the vehicle at low speeds, increasing the risk of a crash.

REMEDY:
GM will notify owners, and dealers will replace the torque sensor assembly, free of charge. The manufacturer has not yet provided a notification schedule. Owners may contact Chevrolet customer service at 1-800-222-1020 or Pontiac customer service at 1-800-762-2737. GM's number for this recall is 14772. Note: This is an expansion of recall 14V-153 to cover additional vehicles built between April 1, 2006 and June 30, 2006.

NOTES:
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www. Safercar. Gov.

Looks like its the torque sensor that needs replacement. Here is the fix

Check out the diagrams (Below). Please let us know what happens.

To find out exactly whats going on a CAN scan needs to be done, Here is a video but I would start with the sensor since there is a bulletin. I know you replace it once already but if it is an issue it could be out again.

https://youtu.be/InIlnsjOVFA

Please let us know what happens.

Please do

Yep, I have seen steering units go out in these cars, I would have it done it should fix the problem.

You can do it yourself, but you will need a scan tool to set the module up. If you do the job a shop can calibrate it for you for about $130.00. Here are the instructions to do the job in the diagrams below.

Please let us know what happens.