Ticking Type Noise Coming From The Engine Compartment - keywords mount right side strut tower

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Some owners may comment that there is a ticking type noise coming from the engine compartment. Some may describe the ticking as rhythmic. Upon closer inspection you may find that the noise is coming from the area between the engine and the right side strut tower.

The noise may be coming from the right side engine mount strut which appears to be cycling in and out at a steady speed. At the present time the exact cause for this is being investigated by Engineering. To determine if the strut is the cause of the noise, proceed to the next step.

If necessary remove the air cleaner assembly to improve access to the bolts attaching the strut bracket to the engine.

1. Remove the two bolts (1) that attach the strut bracket to the engine.
2. Position the strut bracket away from the engine.
3. Start the engine and verify if the noise is still present.

•	If the noise IS still present then the strut and bracket is not the cause. Reassemble the bracket to the engine, reinstall the air cleaner assembly and continue with your diagnosis.

•	If the noise is NOT present then proceed to the next section in this document.

Replace the strut and bracket assembly. See SI Document #1774297.

Important: The new service part being installed is the same design as the part being removed. While installing a new service part has been successful in eliminating the noise, there is no guarantee that replacing the strut and bracket assembly will correct the condition on a long term or permanent basis.

As soon as the root cause of this condition is identified and a repair is developed, this document will be updated and/or a bulletin published. Advise the vehicle owner that GM is working to find the root cause of the noise and that you will contact them if necessary when a repair procedure has been made available.

See "Engine Mount Strut Replacement" in the Labor Time Guide for the latest Operation Number and time allowance.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.