Back to Buick
Official AutoWiki Guide

Buick Model G

Find Me One
```html

The Buick Model G: A Comprehensive Guide

The Buick Model G, while not as widely remembered as some of Buick's more iconic nameplates, represents an important chapter in the brand's history. Produced primarily in the early to mid-2000s, under the name Regal or LaCrosse, the "Model G" refers to GM's internally designated "G platform." These front-wheel drive mid-size cars offered a blend of comfort, practicality, and value, targeting buyers seeking a refined alternative to more mainstream offerings. This guide will provide a detailed look at the Buick Model G (Regal/LaCrosse), covering its history, generations, reliability, driving experience, and buying advice.

Generations of the Buick Model G (Regal/LaCrosse)

The "Model G" designation, referring to the GM G platform, spanned several generations and nameplates. Below is a breakdown of the key Buick models associated with this platform, focusing on those relevant to the early to mid-2000s timeframe commonly associated with the Model G designation.

1. Regal (1997-2004) - Third Generation (Specifically 1997-2004)

  • Years: 1997-2004
  • Key Changes: This generation marked a significant shift to front-wheel drive and a more modern design. It featured two body styles: a four-door sedan and a two-door coupe. Engine options primarily included variations of the 3.8L "3800" V6, known for its reliability. A supercharged version of the 3.8L was available in the GS trim.
  • Sub Models: Base, LS, GS

2. LaCrosse (2005-2009) - First Generation (W-body based)

  • Years: 2005-2009
  • Key Changes: The LaCrosse replaced both the Regal and the Century. It was based on the updated GM W-body platform. It presented a more upscale and refined image than its predecessors. Engine options included 3.6L V6 and 3.8L V6 engines.
  • Sub Models: CX, CXL, CXS

3. Regal (2011-2017) - Fourth Generation (Epsilon II platform)

  • Years: 2011-2017
  • Key Changes: While a "Model G" in spirit (being a mid-size Buick), this generation was built on the Epsilon II platform and is often not considered to be related. It offers a more modern design and European-inspired driving dynamics, it's included for completeness as a Regal model. Engine options included turbocharged 2.0L I4 and 2.4L I4 engines, as well as a 3.6L V6.
  • Sub Models: Base, Premium I, Premium II, GS

Reliability & Common Issues

The reliability of the Buick Model G (Regal/LaCrosse) varies depending on the specific generation and engine. Here's a breakdown of common issues and potential problem areas:

3.8L "3800" V6 Engines (1997-2008 Models):

  • Pros: These engines are renowned for their durability and longevity. They are generally considered very reliable and can often last well over 200,000 miles with proper maintenance.
  • Cons:
    • Intake Manifold Leaks: A common issue is coolant leaks from the plastic intake manifold, particularly around the coolant elbows. Replacing the intake manifold with an updated design (aluminum elbows) is a worthwhile investment.
    • Crankshaft Position Sensor Failure: These sensors can fail, causing stalling or no-start conditions.
    • Oil Leaks: Valve cover gaskets and oil pan gaskets can leak over time.

3.6L V6 Engines (2005-2009 LaCrosse):

  • Pros: Offers more power and better fuel economy than the 3.8L in some applications.
  • Cons:
    • Timing Chain Issues: Prone to stretching and failure, especially if oil changes are neglected. Listen for a rattling sound on startup, which could indicate a timing chain problem. This is a significant repair.
    • High Oil Consumption: Some 3.6L engines are known to consume oil, requiring more frequent topping off.

Transmission Issues:

  • 4T65-E Transmission (1997-2008 Models): Generally robust, but can experience hard shifting or slipping, especially with age and lack of maintenance. Regular fluid changes are crucial.
  • 4T65E-HD Transmission (GS Models): Beefed up version of the 4T65-E, so is more reliable.

Other Common Issues:

  • ABS Sensor Failures: ABS sensors can fail, causing the ABS light to illuminate.
  • Power Window Regulator Problems: Power windows can sometimes become slow or fail due to worn regulators.
  • Rust: Check for rust, especially in areas prone to corrosion like rocker panels, wheel wells, and undercarriage.
  • Electrical Issues: Various electrical gremlins can occur, so check all electrical functions thoroughly.

Driving Experience

The driving experience of the Buick Model G (Regal/LaCrosse) can be characterized as comfortable and refined, with a focus on ease of use rather than sporty handling. Here's a breakdown of the pros and cons:

Pros:

  • Comfortable Ride: The suspension is tuned for a smooth and comfortable ride, making it well-suited for long highway drives.
  • Quiet Cabin: Buick typically prioritizes sound insulation, resulting in a relatively quiet cabin.
  • Spacious Interior: Offers ample interior space for passengers and cargo.
  • Reliable Engines (especially 3.8L): The 3.8L V6 engine is known for its longevity and dependability.

Cons:

  • Handling: Handling is generally unremarkable and not as sporty as some competitors. The focus is on comfort, not agility.
  • Fuel Economy: Fuel economy can be average, especially with the older 3.8L engines.
  • Styling (subjective): Some may find the styling of certain generations to be somewhat bland or dated.

Buying Advice

If you're considering purchasing a used Buick Model G (Regal/LaCrosse), here's some advice to help you make an informed decision:

Years to Look For:

  • 1997-2004 Regal (with 3.8L): The 3.8L engine is a major selling point for reliability. Look for models with well-documented maintenance records.
  • 2008-2009 LaCrosse (with 3.8L): The last years of the 3.8L offers the updated styling of the LaCrosse with the reliable engine

Years to Avoid (or Be Cautious Of):

  • LaCrosse with 3.6L (2005-2009): Be extremely cautious and thoroughly inspect for timing chain issues. Obtain service records to verify regular oil changes.
  • High-mileage vehicles with neglected maintenance: Regardless of the year, avoid vehicles with a lack of maintenance records or obvious signs of neglect.

Inspection Points:

  • Engine: Listen for unusual noises, check for leaks, and verify smooth idling. Have a mechanic perform a compression test, especially on 3.6L engines.
  • Transmission: Check for smooth and timely shifting. Look for signs of slipping or hard shifts.
  • Brakes: Inspect brake pads, rotors, and brake lines.
  • Suspension: Look for worn shocks, struts, and bushings.
  • Rust: Thoroughly inspect for rust, particularly in vulnerable areas.
  • Electrical: Test all electrical functions, including lights, windows, locks, and climate control.

Pre-Purchase Inspection:

It's highly recommended to have a trusted mechanic perform a pre-purchase inspection before committing to buy any used car. This can help identify potential problems that may not be apparent during a visual inspection.

Overall Recommendation:

The Buick Model G (Regal/LaCrosse) can be a good choice for buyers seeking a comfortable and affordable mid-size car. Prioritize models with the 3.8L V6 engine and a well-documented maintenance history. Be cautious of 3.6L engines due to potential timing chain issues. With careful inspection and maintenance, a used Buick Model G can provide years of reliable service.

```