2008 Cadillac XLR Steering Column: Fixing Power Tilt, Telescope, and Sensor Faults

Known Issues, TSBs, and Recalls

TSB: "Service Stabilitrak" Message and DTC C0710

One of the most documented issues for the 2008 Cadillac XLR with the power tilt and telescopic column is a "Service Stabilitrak" or "Service Active Handling" message appearing on the Driver Information Center (DIC). This is often accompanied by Diagnostic Trouble Code (DTC) C0710. According to General Motors Technical Service Bulletin (TSB) #06-02-35-002B, this fault is typically not caused by a failure of the Steering Wheel Position Sensor (SWPS) itself, but by a poor connection.

The telescoping (in-and-out) motion of the steering column can cause the electrical terminals in the SWPS connector to move and develop fretting corrosion, leading to a high-resistance connection. The official GM fix is to install a special clip (Part Number 19179794) into the SWPS connector. This clip acts as a terminal position assurance (TPA), preventing the terminals from moving and securing the connection. This is a relatively simple fix that can resolve the electronic error without replacing the entire column.

Power Tilt and Telescopic Failure

It is common for the power tilt or telescopic functions to fail. Owners report that the column may stop moving in one or all directions, either intermittently or permanently. This can be caused by several factors:

• Failing Motors: The small electric motors that drive the tilt and telescope mechanisms can wear out over time.
• Wiring Issues: Forum members have reported that electrical issues, sometimes originating from wiring under the driver's seat, can cut power to the column adjustment features. In one case, a hot smell was noticed before the power seat and tilt column stopped working.
• Calibration Errors: The column's position is tracked by the car's computer. Sometimes, particularly after a battery disconnect or a seat calibration procedure, the steering column can become "frozen" and may require a specific steering column calibration procedure using a professional scan tool (like a GM Tech2 or a capable aftermarket tool) to restore function.

Recalls

As of this writing, there are no specific safety recalls issued by the National Highway Traffic Safety Administration (NHTSA) for the steering column assembly on the 2008 Cadillac XLR. Recalls for this model year typically involve other components like the fuel pump or control arms.

Symptoms of a Failing Steering Column

A bad steering column can present a variety of symptoms, ranging from minor annoyances to critical safety hazards.

1. Power Adjustment Failure: The most common issue on the XLR. The tilt or telescopic feature stops working, works only in one direction, or moves very slowly.
2. Grinding or Clicking Noises: Audible grinding, clicking, or popping sounds when turning the wheel or when the power adjustment is activated often point to worn internal gears or bearings.
3. Loose Steering Feel: Excessive play or a clunking sensation in the steering wheel can indicate worn bushings or bearings inside the column, which is a serious safety concern.
4. "Service Stabilitrak" Message: As detailed in the TSB, this message on the dash is a key indicator of a poor connection at the steering wheel position sensor.
5. Malfunctioning Controls: Failure of the horn, cruise control, or radio buttons on the steering wheel can be caused by a damaged clock spring (also called an SIR coil) within the column.

Buying a Used 2008 Cadillac XLR Steering Column

A used steering column can be an excellent value, but careful inspection is critical. Here’s what to check before you buy:

1. Verify the Part Number and Interior Color

This is the most important step. The 2008 XLR column was offered in two colors, and they have different part numbers. Do not rely on photos alone; confirm the part number physically on the part or with the seller.

Using the wrong color will require you to swap shrouds and trim, which is difficult and may not be possible without damage.

2. Inspect All Electrical Connectors

Carefully examine every electrical connector on the column. Look for bent or corroded pins, cracked plastic housings, or cut wires. A column that was removed carelessly can have damaged connectors that will cause major electrical headaches during installation.

3. Check for Physical Damage

Inspect the main column tube for any signs of bending, cracking, or significant impact damage, which could indicate it came from a vehicle in a major collision. A bent column is unsafe and unusable. Check that all mounting brackets are intact and not cracked.

4. Ask About the Clock Spring

Ask the seller if the clock spring (the part that the steering wheel bolts to) is included and was centered before removal. A clock spring that has been spun while the column was out of the car will break upon the first full turn of the steering wheel, disabling the airbag and steering wheel controls.

Cost Comparison

Replacing a steering column is a significant expense. The rarity of the Cadillac XLR means parts are scarce and costly. Here is an estimated cost breakdown:

Replacement Difficulty: 4 out of 5

This is an advanced repair that is not recommended for most DIY mechanics.

• Difficulty Rating: 4/5
• Estimated Time: 3-6 hours
• DIY Feasible: No

The replacement process involves removing the knee bolster, steering wheel (which requires a special puller tool), clock spring, and multiple electrical connectors before unbolting the column from the dash support and the intermediate steering shaft. After installation, a steering angle sensor calibration and/or column calibration may be required with a professional scan tool.

Frequently Asked Questions (FAQ)