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Terraza

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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...

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...

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...

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...

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...

EGR P0404 code accelerating. 2005 Buick Terraza

For this code, there is a related technical service bulletin (https://www.yourmechanic.com/article/how-to-use-a-technical-service-bulletin-by-parker-hill) 06-06-04-003D (http://workshop-manuals.com/buick/terraza_awd/v6-3.5l_vin_l/powertrain_management/prom_programmable_read_only_memory/component_information/technical_service_bulletins/customer_interest/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...

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 (https://www.yourmechanic.com/services/spark-plugs-replacement), fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement), coil (https://www.yourmechanic.com/services/ignition-coil-replacement), fuel injectors (https://www.yourmechanic.com/services/fuel-injector-replacement), MAF sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement), vacuum leak, oxygen...

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...

I have an 05 Buick terraza will drive but when hits 2 ND gear it's like putting it in neutral.

Claimed by Marvin Sunderland

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...

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...

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...

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