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Terraza

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Question
Speed control broken. 2005 Buick Terraza
You may be having a problem with the throttle control actuator assembly not getting a signal from the ECM, or the actuator module is defective. The cruise control test with the dealer scanner can monitor all the inputs and outputs...
Question
ABS T/C error light
Hey there, thanks for writing in about your 2006 Buick Terraza. There is a possibility of the connector C305 under the drivers seat on the rear getting corrosion and damage from water getting on the connector. The connector is not...
Question
Rear power sliding door, 2005 Buick Terraza
The close operation for the door is dependent on the door not being blocked in some way or binding that will cause the motor to reverse. This is a safety feature. The first thing to do is open the door...
Question
Water leak under dashboard
If your vehicle is equipped with a sun roof, then you may have a water leak due to the drains for the roof on both sides being blocked with dirt and debris. You may also have a blocked A/C drain...
Question
EGR P0404 code accelerating. 2005 Buick Terraza
For this code, there is a related technical service bulletin 06-06-04-003D dated March 20,2007. The TSB calls for installing a new EGR kit consisting of a new valve, tube, and wire connector, and directions to reprogram the powertrain control module....
Question
How much should it be to fix a drive belt tension and pulley has oil on it
You would first need to find out the reason for the oil leaking on the belt. You may have a power steering leak, an oil seal leak, or a water pump problem. Once the leak is found then a proper...
Question
Reduced engine power
Hello there, many common problems will cause your 2009 Buick Terraza to have a loss of engine power. The most common would be spark plugs, fuel pump, coil, fuel injectors, MAF sensor, vacuum leak, oxygen sensors, or a wiring harness...
Question
Remote start system and bypassing the hood sensor
Hello. If your hood sensor indicator is on then that is a sign that the hood is either open, or that there is an issue with the hood sensor. If the sensor is faulty I would recommend repairing the issue...
Question
Overheating issues
Hi there: It's is common to see the temperature gauge rise slightly when you come to a stop; especially if the thermostat has not fully opened due to the lower temperature. However, if it rises into the "red" of your...
Question
Throttle Positions VS Voltage Fluctuation
This may be related to a couple of different possibilities such as a faulty throttle position sensor or potentially a faulty instrument voltage regulator. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the...
Question
Headlights flicker as throttle demands more power. 2006 Buick Terraza
Hi there - your symptoms suggest that the electrical charging system isn't holding a proper or constant voltage while the engine is running. This should be about 13+ volts with the engine running at a fast idle. The cause of...
Question
2006 Terraza - well kept up with 167 miles. After starting then engine, often it is impossible to shift from Park for a while with engine running. Any common clues?
Hi there. Either the shifter interlock solenoid is not working at times causing the shifter to not move out of park or the neutral safety switch on the brake switch is not working at times causing the shifter to not...
Question
Charging System Failure and Battery Light on
Hi There, It sounds like you may have a voltage regulator issue that might not be allowing the alternator to charge the battery sufficiently. The voltage regulator could be allowing the alternator to supply too much or too little amperage...
Question
Do you reccomend replacing the rear self leveling air shocks with just standard gas shocks, or stick with the self leveling?
The rear coil springs that were installed on the vehicle in the load leveling versus non load leveling models are different (I checked the GM parts catalog to confirm). Inasmuch as the spring and the shock were matched for handling...
Question
Voltage Regulator
The voltage regulator on your car is integral to the alternator. If you have diagnosed your charging or electrical failure as due just to the voltage regulator, you should request GM part number 15926088. See also GM TSB (technical service...
Question
Instructions Needed for 2006 Buick Terraza Intake Manifold Gasket Replacement
First of all, this is a pretty big job that I don't recommend tackling on your own. However, if you're looking for instructions, you can find a free repair manual for your vehicle on Autozone's website. The 'Zone offers free...
Question
Hello. My car shifts into gear... the engine revs, the transmission gauge moves as it should... but the car doesn't move right awa
Hi Kim. Thanks for writing in to YourMechanic.com today. As much as I'd like to tell you for certain that it's a speed sensor issue, the description you're providing just won't permit me to do so. Generally speaking, what you...
Question
Car only throws heat out on driver side and cool air on passenger side in summer a/c works very little
Hello, thank you for writing in. The air temperature coming through the vents has more to do with where the air is coming from. If the heater is running it will be passed along the heater core and pushed into...

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