1. Steering Racks & Gear Boxes For Sale
  2. sku: 18705589035552782
  3. PONTIAC BONNEVILL

PONTIAC 237.GM2T99 Bonnevill Intermediate Steering Shaft

fits make: Pontiac. year: 1999.

237.gm2t99 Pontiac Bonnevill 1999 Intermediate Steering Shaft 72776

( Model: BONNEVILL ), ( Conditions Options: Intermediate Shaft ), ( Genuine Oem: Yes ), ( Ipn: 237.gm2t99 ), ( Descriptionpartcondition: Picture Of Actual Part ), ( Universal Fitment: No ), ( Manufacturer Warranty: No Warranty )

Review PONTIAC Bonnevill Intermediate Steering Shaft fits 1999

The **Pontiac Bonneville 1999 Intermediate Steering Shaft (Part Number: 237.GM2T99)** is a precision-engineered component designed specifically for the third-generation GM T-body platform, which includes the iconic Bonneville, Grand Prix, and other full-size Pontiac models produced between 1994 and 2005. This steering shaft serves as a critical link between the steering wheel and the steering column, transmitting driver input to the vehicle s power steering mechanism while maintaining smooth, responsive handling. Crafted from high-grade steel and engineered to meet GM s stringent durability standards, this shaft is built to withstand the rigors of daily driving, including prolonged exposure to road debris, temperature fluctuations, and the mechanical stress of frequent steering adjustments. The design incorporates a robust universal joint at the lower end, allowing for slight angular movement as the steering column pivots, while the upper section features a secure clamp mechanism that ensures a tight, vibration-free connection to the steering column itself. For restoration or replacement purposes, this part is an exact factory match, ensuring compatibility with the Bonneville s original steering system without the need for modifications. Whether restoring a classic Bonneville to its former glory or addressing a worn-out component in an existing vehicle, this intermediate steering shaft delivers the reliability and performance expected from a genuine GM part, helping to preserve the driving dynamics and safety features that made the 1999 Bonneville a standout in its class.

### **Pros and Cons of Buying a 1999 Pontiac Bonneville (GM 237 Steering Shaft, Intermediate Shaft)**

#### **Pros**

1. **Classic American Muscle Car Appeal** The 1999 Bonneville, particularly with the LS1 V8 engine, is a well-regarded muscle car with a strong following. Its aggressive styling and performance-oriented heritage make it a desirable choice for enthusiasts.

2. **LS1 V8 Engine (If Equipped)** The LS1 is one of General Motors most reliable and powerful V8 engines from the late '90s. It produces around **345 350 horsepower** and **350 lb-ft of torque**, making it capable of strong acceleration and towing performance. If the vehicle has this engine, it offers a solid foundation for modifications.

3. **Front-Wheel Drive (FWD) or All-Wheel Drive (AWD) Options** The Bonneville was available with either FWD or AWD, which can be beneficial depending on driving conditions. AWD models provide better traction in snow or off-road situations.

4. **Modifiable Platform** The Bonneville s chassis is a solid base for performance upgrades, including suspension tuning, exhaust modifications, and engine swaps (such as a LS2 or LS3). The LS1 itself is a popular donor engine for other GM applications.

5. **Reliability of GM s 1990s Architecture** While not as refined as later GM vehicles, the Bonneville s drivetrain components (transmission, suspension, and steering) are generally durable if maintained properly. The **4L60-E or 4L65-E automatic transmissions** are robust and can handle power upgrades.

6. **Aftermarket Support** The Bonneville has a strong aftermarket community, with parts and modifications readily available for performance tuning, interior upgrades, and cosmetic enhancements.

7. **Potential for Low Mileage or Well-Maintained Examples** Some 1999 Bonnevilles may have been kept in good condition, especially if they were owner-maintained. A well-documented vehicle with regular oil changes and transmission fluid flushes can be a solid investment.

8. **Resale Value for Enthusiasts** While not a high-demand classic, Bonnevilles with LS1 engines hold value among muscle car collectors, especially if they are in good condition.

---

#### **Cons**

1. **Aging Suspension and Steering Components** The **intermediate steering shaft** you mentioned is a critical part of the steering system. Over time, these shafts can wear out, develop play, or fail entirely, leading to poor handling or sudden loss of control. Replacing them is often expensive, especially if the vehicle has high mileage.

2. **Rust Concerns (Especially in Snow Belt Regions)** Many 1990s GM vehicles, including the Bonneville, are prone to rust, particularly in the wheel wells, rocker panels, and undercarriage. A thorough inspection is necessary to avoid buying a vehicle with structural rust that could compromise safety.

3. **Transmission and Drivetrain Wear** The **4L60-E/4L65-E transmissions** are durable but can develop issues like slipping, rough shifting, or solenoid failures over time. The **differential and driveshafts** may also need attention if the vehicle has high mileage.

4. **Electrical and Computer Issues** The Bonneville s **PCM (Powertrain Control Module)** and other electronics can fail or require reprogramming. Issues like check engine lights, sensor failures, or alternator problems are common in older GM vehicles.

5. **Fuel Economy Limitations** The LS1 V8 is thirsty, with **MPG in the low 12 16 range** on the highway and even lower in stop-and-go traffic. This can be costly for daily driving, especially with rising fuel prices.

6. **Maintenance Costs** While not excessively expensive, parts and labor for a 1999 Bonneville can add up. Items like **spark plugs, oxygen sensors, and timing belts** (if applicable) require regular attention. The **LS1 s oil consumption** can also be an issue if not addressed.

7. **Potential for Hidden Problems** Without a **pre-purchase inspection (PPI)**, it s easy to miss issues like:

- **Leaking power steering or cooling systems**

- **Worn-out bushings or control arms**

- **Exhaust leaks or catalytic converter failures**

- **Transmission fluid degradation**

8. **Limited Modern Safety Features** The 1999 Bonneville lacks modern safety tech like **stability control, advanced airbag systems, or electronic brake assist**. This makes it less safe in modern driving conditions compared to newer vehicles.

9. **Depreciation and Insurance Costs** Classic muscle cars depreciate quickly, and insurance premiums for high-performance vehicles can be **significantly higher** than for modern sedans.

10. **Steering Shaft-Specific Risks** The **intermediate steering shaft** you re referring to is a known weak point in some GM vehicles. If it s already worn or cracked, replacement can cost **$300 $800**, depending on labor and parts. A failed shaft can lead to **sudden loss of steering control**, which is a serious safety hazard.

---

### **Conclusion**

Buying a **1999 Pontiac Bonneville with an LS1 V8 and an intermediate steering shaft** can be a rewarding experience if you re an enthusiast looking for a **project car or a daily driver with performance potential**. The LS1 engine is one of the best in its class, and the Bonneville s platform allows for meaningful modifications. However, the **steering shaft issue, rust concerns, and potential drivetrain problems** make this a **high-risk purchase** unless you re prepared for repairs.

If you re **not mechanically inclined or unwilling to invest time/money in maintenance**, this may not be the best choice. On the other hand, if you **plan to restore it, modify it, or keep it as a weekend project**, it could be a great investment in the long run **as long as you thoroughly inspect it first**.

---

### **Recommendation**

1. **Get a Pre-Purchase Inspection (PPI)** Hire a **trusted mechanic** to check the **steering shaft, suspension, drivetrain, and engine**. This is **non-negotiable** many issues (like a failing steering shaft) won t be visible to an untrained eye.

2. **Test Drive Carefully** Pay attention to:

- **Steering feel** (any play, vibrations, or sudden stiffness?)

- **Transmission shifts** (smooth or jerky?)

- **Braking performance** (soft or hard pedal?)

- **Exhaust leaks or unusual noises**

3. **Check for Rust** Inspect the **wheel wells, frame rails, and undercarriage** for corrosion. Rust can weaken structural integrity.

4. **Verify Maintenance History** Ask for **service records**, especially for:

- **Oil changes** (LS1s need frequent oil changes)

- **Transmission fluid flushes**

- **Timing belt/replacement** (if applicable)

- **Suspension component replacements**

5. **Budget for Repairs** If the steering shaft is bad, **plan for $500 $1,000 ** in repairs. Other potential costs:

- **Suspension refresh** ($1,000 $2,000)

- **Transmission rebuild** ($1,500 $3,000)

- **Exhaust system replacement** ($500 $1,200)

6. **Consider Alternatives**

- If you want a **reliable daily driver**, look for a **modern muscle car** (e.g., Ford Mustang GT, Chevrolet Camaro SS).

- If you want a **project car**, consider a **less expensive GM platform** (e.g., a 2000 2005 Camaro with a known-good LS1).

7. **Buy from a Reputable Seller** Avoid private sellers with no history. Dealerships or **trusted enthusiast sellers** (like those on **Bring a Trailer, Facebook Marketplace, or MuscleCar.com**) are better options.

### **Final Verdict**

**Buy it only if:**

You re **mechanically capable** of handling repairs.

You ve **budgeted for major work** (steering shaft, suspension, drivetrain).

You **love the Bonneville s heritage** and plan to restore/modify it.

The **PPI confirms it s in decent shape** (or you re okay with a project).

**Avoid it if:**

You want a **low-maintenance, safe daily driver**.

The seller **won t provide a full history or PPI**.

The **steering shaft or other critical parts are failing**.

If you proceed, **prioritize the steering shaft and suspension** these are the most critical safety concerns. Otherwise, you risk ending up with a **beautiful but unreliable project** that costs more than it s worth.

Details:

part #: 237.gm2t99 price

  • $28.78

specifications steragebo:

  • for makes: Pontiac
  • for years: 1999
  • model: Bonnevill
  • conditions options: Intermediate Shaft
  • genuine oem: Yes
  • ipn: 237.gm2t99
  • descriptionpartcondition: Picture Of Actual Part
  • universal fitment: No
  • manufacturer warranty: No Warranty

seller steragebo:

  • # reviews: 3
  • city: Big Rapids, Michigan
  • rating: 100.0%

offer steragebo:

  • started: April 6, 2026
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 1

general steragebo:

  • Car Truck Parts Accessories > Steering Suspension > Gearboxes, Rack Pinions
  • condition: Used

returns steragebo:

  • paid by: Buyer
  • time: 30 Days
  • policy: Returns Accepted

shipping steragebo:

  • transit: 4-10 Days
  • service: Standard
  • type: Fixed
  • cost: $0.00
  • class: Standard

payments steragebo:

  • other
  • credit card: Diners-club
  • wallet: Paypal
for makes: pontiac, for years: 1999, conditions options: intermediate shaft, genuine oem: yes, descriptionpartcondition: picture of actual part, universal fitment: no, manufacturer warranty: no warranty,
manufacturer: pontiac, category: auto parts > car truck parts accessories > steering suspension > gearboxes, rack pinions, sku: 18705589035552782,
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