1990-1992 Cadillac Allante Steering Column: Diagnosing Looseness and No-Start Issues

Symptoms of a Failing Steering Column

A problem with the steering column can show up in several ways, ranging from annoying noises to the car not starting at all. Because it contains both mechanical and electrical parts, symptoms can be varied.

1. Loose or Wobbly Steering Wheel

The most common complaint for this era of GM steering columns is a feeling of looseness in the tilt mechanism. The steering wheel may feel like it has excessive play, especially when pulling up or pushing down on it. This is typically caused by four specific bolts inside the column housing working themselves loose over time. While the car is still steerable, the wobble can be unnerving and puts extra stress on other steering components.

2. "Security" Light and No-Start Condition

If your Allante cranks but won't start, or won't even crank, and you see a "SECURITY" light on the dash, the problem is likely the PASS-Key system. The 1990-1992 Allante uses the PASS-Key I system, which relies on a small resistor pellet on the ignition key. Two small wires run from the ignition lock cylinder down the steering column. Over time, these thin wires can break from the repeated motion of turning the key and tilting the wheel, or the contacts in the lock cylinder can wear out. When the car's computer can't read the key's resistance, it assumes a theft attempt and disables the starter or fuel injectors.

3. Grinding or Squeaking When Turning

Noises from the column while turning the wheel often point to failing upper steering column bearings. A clicking or snapping sound can also be caused by issues with the bearing race or spring inside the column. A rubbing or grinding noise might indicate that the steering shaft is making contact with a dash support bracket.

4. Electrical Failures

Since the turn signals, wipers, cruise control, and high-beam switch are all mounted to the column, their failure can sometimes be traced back to worn-out wiring or a faulty multi-function switch within the column assembly, not just the stalk itself.

Known Issues, Recalls, and Technical Service Bulletins (TSBs)

• Loose Tilt Column: This is a widely recognized issue on many GM vehicles from the 1970s through the 1990s that use the Saginaw tilt column design. The repair involves disassembling the upper portion of the column to access and tighten four inverted Torx bolts. While parts are minimal, the labor is intensive.
• PASS-Key System Failure: Intermittent no-start conditions related to the PASS-Key system were common enough that GM issued technical bulletins for dealers. The issue is almost always caused by a break in the connection between the key and the car's theft-deterrent module, which occurs inside the column.
• Recalls: As of mid-2024, there are no outstanding NHTSA recalls specifically for the steering column assembly on the 1990-1992 Cadillac Allante. Any recalls for this vehicle typically pertain to other systems like brakes.

Buying a Used 1990-1992 Allante Steering Column

Given that new OEM columns have been discontinued, a quality used OEM unit is the best and often only option. Aftermarket support for a low-production vehicle like the Allante is virtually nonexistent. Here’s what to look for.

Physical Inspection Checklist:

• Check for Looseness: Grab the upper part of the column and try to move it up and down. There should be no significant play or clunking. If there is, the internal tilt bolts are loose, and it will need to be repaired.
• Inspect Wiring and Connectors: Carefully examine the orange sheathing for the airbag wires and the small wires for the PASS-Key system. Look for any cuts, exposed copper, or brittle insulation. Ensure all plastic connectors are intact and not cracked.
• Test the Tilt and Ignition: If possible, move the tilt lever and feel for smooth operation. It should lock firmly into each position. The column should come with the original key; insert it and turn the ignition lock cylinder. It should turn smoothly without binding. A column without a key is a major red flag, as you will have significant issues with the PASS-Key system.
• Examine the Multi-Function Switch: Check the turn signal stalk for cracks and ensure it moves and clicks into place properly. These can become brittle with age.
• Ask the Seller: Inquire about the mileage of the donor car and the reason it was taken off the road. A column from a low-mileage, non-accident vehicle is always preferable.

Cost Comparison for Steering Column Replacement

Prices can vary based on your location and the specific shop, but this provides a general estimate.

Replacement Overview & Difficulty

• Difficulty Rating: 4 out of 5
• Estimated Time: 3-4 hours
• DIY Feasible: Not recommended for beginners.

Replacing the steering column is a complex job primarily due to the need to safely handle the airbag system. The process involves disconnecting the battery, disabling the SIR (airbag) system, using a special puller to remove the steering wheel, removing dash panels, disconnecting multiple electrical harnesses, and unbolting the column from both the dash support and the intermediate steering shaft.

Frequently Asked Questions (FAQ)