How to Disable the AWD on a Buick Rendezvous

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The all-wheel drive, or AWD, system on a Buick Rendezvous engages all four wheels to increase traction in slippery conditions. The power train control module, or PCM, reads data from a number of sensors and determines when to engage the AWD system. This system is always on, and the vehicle does not have a switch to toggle the AWD on and off. Removing the AWD relay from the under-hood relay control box disables the AWD system.

  • Park the vehicle on a flat surface and turn off the engine. Set the parking brake and open the hood.

  • Locate the under-hood relay control box. It is on the left side of the engine compartment next to the passenger side fender. It is a black plastic box that measures approximately 7 in. by 7 in.

  • Depress the locking tabs on the box's cover and remove the cover from the box. Look at the diagram on the underside of the cover. This diagram shows the exact location of the AWD relay within the box.

  • Locate the relay according to the diagram on the cover, remove it and replace the cover.

Tips & Warnings

  • The AWD system is an important safety feature and should only be disabled for diagnostic or testing purposes.

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