GM 10152240 Reinforcement, Engine Mount Bracket

For the rear mount replacement, raise the engine to relieve weight. Remove the bolts attaching the crossmember to the mount, and then take out the mount-to-transmission bolts before removing the engine mount. Finally, install the new mount on the transmission, aligning and starting the crossmember-to-mount bolts while lowering the transmission onto the mount, and torque-tighten the bolts.

They need to be replaced, which can be done with the engine/transmission still in the vehicle.

Detach the negative battery cable again, remove the nuts from the engine mount while working under the frame mounting bracket, raise the engine off the mount, and remove the mount-to-bracket nuts to take the mount out of the vehicle. Installation follows the reverse order of removal, gently lowering the engine and tightening the nuts securely before reconnecting the negative battery cable.

To check the mounts, the engine must be raised slightly to relieve weight from them. Begin by raising the vehicle and securely supporting it on jack stands, then position a jack under the engine oil pan with a large block of wood in between. Carefully raise the engine just enough to take the weight off the mounts, ensuring no part of the body is placed under the engine when it is only supported by a jack. Inspect the mount insulators for movement; if any is noted, lower the engine and tighten the mount fasteners. Applying rubber preservative to the insulators can help slow deterioration.