2007 Pontiac Montana

2007 Pontiac Montana

The 2007 Pontiac Montana is a minivan that was available with three engine options: a 3.5L V6, a 3.9L V6, and a 3.9L V6 with FlexFuel capability. The 3.5L V6 produced 201 horsepower and 222 lb-ft of torque, while the 3.9L V6 produced 240 horsepower and 244 lb-ft of torque. Both engines were mated to a 4-speed automatic transmission.

The Montana was praised for its spacious interior, comfortable ride, and powerful engines. However, it was also criticized for its poor fuel economy and outdated design.

Engine

3.5L V6

• Intake Manifold Gasket Failure: A faulty intake manifold gasket can cause coolant and oil to leak, leading to overheating and engine damage. Symptoms include coolant leaks, oil leaks, and rough idling. The solution is to replace the intake manifold gasket. Estimated Cost to Fix: $300 - $600+
• Timing Chain Tensioner Failure: The timing chain tensioner can fail, causing the timing chain to slip and damage the engine. Symptoms include a rattling noise from the engine, an illuminated check engine light, and a loss of power. The solution is to replace the timing chain tensioner. Estimated Cost to Fix: $400 - $800+

3.9L V6

• Head Gasket Failure: A blown head gasket can cause coolant and oil to mix, leading to overheating and engine damage. Symptoms include coolant leaks, oil leaks, and a white or milky substance in the oil. The solution is to replace the head gasket. Estimated Cost to Fix: $1,000 - $2,000+
• Intake Manifold Runner Control Motor Failure: The intake manifold runner control motor can fail, causing a loss of power and fuel economy. Symptoms include a rough idle, hesitation during acceleration, and a decrease in fuel efficiency. The solution is to replace the intake manifold runner control motor. Estimated Cost to Fix: $200 - $400+

3.9L V6 with FlexFuel

• Fuel Injector Failure: The fuel injectors can fail, causing a loss of power and fuel economy. Symptoms include a rough idle, hesitation during acceleration, and a decrease in fuel efficiency. The solution is to replace the fuel injectors. Estimated Cost to Fix: $400 - $800+

Transmission

• 4-Speed Automatic Transmission
• Transmission Fluid Leak: A leaking transmission can cause a loss of fluid, leading to transmission damage. Symptoms include a slipping transmission, a burning smell, and a low transmission fluid level. The solution is to replace the leaking seal or gasket. Estimated Cost to Fix: $200 - $500+
• Shift Solenoid Failure: A faulty shift solenoid can cause the transmission to shift erratically or not at all. Symptoms include slipping gears, a delayed shift, or a lack of response from the transmission. The solution is to replace the shift solenoid. Estimated Cost to Fix: $300 - $600+

Suspension

• Front Strut Failure: The front struts can wear out over time, leading to a loss of ride comfort and handling. Symptoms include a bouncy or rough ride, uneven tire wear, and a decrease in braking performance. The solution is to replace the front struts. Estimated Cost to Fix: $400 - $800+
• Rear Shock Absorber Failure: The rear shock absorbers can wear out over time, leading to a loss of ride comfort and handling. Symptoms include a bouncy or rough ride, uneven tire wear, and a decrease in braking performance. The solution is to replace the rear shock absorbers. Estimated Cost to Fix: $200 - $400+

Electrical

• Battery Drain: A faulty alternator or parasitic drain can cause the battery to drain, leading to a no-start condition. Symptoms include difficulty starting the vehicle, a dim headlights, and a battery that goes dead after a short period of time. The solution is to replace the alternator or find and fix the parasitic drain. Estimated Cost to Fix: $200 - $600+
• Starter Failure: A faulty starter can prevent the engine from starting. Symptoms include a clicking noise when trying to start the vehicle, a lack of response from the starter, or a slow crank. The solution is to replace the starter. Estimated Cost to Fix: $300 - $600+
• Headlight Switch Failure: The headlight switch can fail, causing the headlights to not work. Symptoms include no headlights, intermittent headlights, or headlights that stay on all the time. The solution is to replace the headlight switch. Estimated Cost to Fix: $100 - $200+
• Power Window Failure: The power window motors or switches can fail, causing the windows to not work. Symptoms include windows that do not move, windows that move slowly, or windows that fall off track. The solution is to replace the faulty motor or switch. Estimated Cost to Fix: $200 - $400+

Exterior

• Side Mirror Adjustment Motor Failure: The side mirror adjustment motors can fail, causing the mirrors to not adjust properly. Symptoms include mirrors that do not move, mirrors that move slowly, or mirrors that move erratically. The solution is to replace the faulty motor. Estimated Cost to Fix: $100 - $200+
• Door Lock Actuator Failure: The door lock actuators can fail, causing the doors to not lock or unlock properly. Symptoms include doors that do not lock or unlock, doors that lock or unlock intermittently, or doors that lock or unlock by themselves. The solution is to replace the faulty actuator. Estimated Cost to Fix: $200 - $400+

Interior

• Heater Core Failure: The heater core can fail, causing a loss of heat inside the vehicle. Symptoms include no heat, cold air coming from the vents, or a sweet smell inside the vehicle. The solution is to replace the heater core. Estimated Cost to Fix: $500 - $1,000+
• Air Conditioning Compressor Failure: The air conditioning compressor can fail, causing a loss of cool air inside the vehicle. Symptoms include no cool air, warm air coming from the vents, or a lack of response from the air conditioning system. The solution is to replace the air conditioning compressor. Estimated Cost to Fix: $600 - $1,200+

Summary

The 2007 Pontiac Montana is a minivan with a spacious interior, comfortable ride, and powerful engines. However, the vehicle has a number of potential issues, ranging from minor annoyances to major mechanical failures. Some of the most common issues include intake manifold gasket failure, timing chain tensioner failure, and transmission fluid leaks. The severity and cost of these issues can vary depending on the specific problem and the extent of the damage.