1991 Buick Commercial Chassis

1991 Buick Commercial Chassis

The 1991 Buick Commercial Chassis is a versatile workhorse that offers a range of powertrain options and configurations. It was available with a choice of two gasoline engines and one transmission.

Engine

5.7L V8

• Head Gasket Failure: Blown head gaskets can result in coolant leaks, overheating, and engine damage. Requires replacement of head gaskets and associated components. Estimated Cost to Fix: $1,500+
• Intake Manifold Gasket Failure: Leaking intake manifold gaskets can cause vacuum leaks, rough idle, and reduced engine performance. Replacement of intake manifold gaskets is necessary. Estimated Cost to Fix: $500 - $1,000

Transmission

4-Speed Automatic 4L60

• Transmission Slipping: Internal transmission components may wear out over time, causing slipping and delayed shifts. Requires repair or replacement of transmission components. Estimated Cost to Fix: $1,500+
• TCC Solenoid Failure: A faulty TCC solenoid can cause the transmission to shift erratically or fail to engage. Requires replacement of TCC solenoid. Estimated Cost to Fix: $200 - $500

Suspension

• Front Suspension Wear: Bushings and ball joints in the front suspension can deteriorate, causing noise, vibration, and reduced handling. Replacement of worn components is necessary. Estimated Cost to Fix: $500 - $1,000
• Rear Axle Seal Leak: Leaking seals on the rear axle can allow gear oil to escape, causing damage to the axle and drivetrain. Replacement of rear axle seals is required. Estimated Cost to Fix: $300 - $600

Electrical

• Alternator Failure: A failing alternator may not provide sufficient power to the vehicle’s electrical system, causing battery drain and component failure. Replacement of the alternator is necessary. Estimated Cost to Fix: $500 - $1,000
• Starter Failure: A faulty starter may prevent the engine from starting or may cause grinding noises during startup. Replacement of the starter is necessary. Estimated Cost to Fix: $300 - $700

Exterior

• Headlight Switch Failure: The headlight switch may fail, causing the headlights to malfunction or not turn on. Replacement of the headlight switch is required. Estimated Cost to Fix: $150 - $300

Interior

• Dash Cluster Failure: The dash cluster may malfunction, resulting in inaccurate readings or inoperability. Replacement of the dash cluster or its components is required. Estimated Cost to Fix: $500+

Summary

The 1991 Buick Commercial Chassis is a capable work vehicle but is not without its issues. Engine and transmission problems can be costly to repair, and suspension and electrical issues can affect the vehicle’s reliability and safety. Interior problems are relatively minor and less expensive to fix. Overall, the severity and cost of the issues vary depending on the specific problem encountered.