Question 1

How to replace the left engine mount on GMC Sierra 3500?

Accepted Answer

Begin the left engine mount replacement by ensuring proper vehicle elevation: the two-wheel drive needs lifting to the front wheelhouse opening but four-wheel drives require being lifted with the tires and wheels off. Start the procedure by taking off the left front wheel before removing wheelhouse inner panel push pin retainers and wheelhouse inner panel. Users can access the engine mount heat shield bolts by entering through the wheelhouse opening before removing the heat shield. Begin by removing the engine mount-to-engine mount bracket bolt before proceeding to remove the oil pan skid plate bolts when needed. A suitable jack should lift the engine to a limited height that breaks its connection to the engine mount bracket after removing engine shield bolts and shield along with the engine mount bolts. First discharge the engine mount-to-engine bolts and detach the mount while next discarding the mount bracket through bolts and bracket itself. To install the engine mount bracket position it on the frame then remove all original adhesive before cleaning all bolt threads with denatured alcohol followed by applying threadlocker GM P/N 12345382 (Canadian P/N 10953489) to the bolts. Begin by attaching the mount bracket through bolts in a loose manner and position the engine mount to the engine before installing the engine mount-to-engine bolts in a loose state. Secure the engine mount bracket through bolts at 75 Nm (55 ft. lbs.) while mounting bolts at the engine should be tightened to 50 Nm (37 ft. lbs.). Install the engine shield followed by its mounting bolts while tightening both to 20 Nm (15 ft. lbs.). Proceed to lower the engine. The vehicle must have an oil pan skid plate which you should install by following up with 20 Nm (15 ft. lbs.) torque. Install the engine mount heat shield afterward together with the engine mount-to-engine mount bracket bolts while tightening these fasteners to 65 Nm (48 ft. lbs.). Install the left front tire together with the wheel while reattaching the wheelhouse inner panel push pin retainers and the wheelhouse inner panel before lowering the vehicle.

Question 2

How to replace the right engine mount on GMC Sierra 3500?

Accepted Answer

The first step to replace a right engine mount requires you to properly elevate the vehicle through lifting it for a 2 wheel drive (2WD) until you can reach the front wheelhouse opening whereas a 4 wheel drive (4WD) vehicle needs to be lifted for front tire and wheel removal. Start by taking out the left front tire combined with wheel then move to the wheelchair inner panel push pin retainers before removing the wheelchair inner panel. Get inside the wheelhouse opening to erase bolts securing the engine mount heat shield and extract the heat shield. The maintenance procedure starts with removing the engine mount-to-engine mount bracket bolt followed by the oil pan skid plate bolts with plate if present and engine shield bolts with shield. Use an appropriate jack to lift the engine until the engine mount can detach from its engine mount bracket before removing both types of mount bolts and the engine mount itself. The next step requires removal of the bracket through bolts along with the bracket itself. The engine mount bracket installation process begins with mounting the bracket onto the frame while removing the original adhesive and cleaning bolt threads with denatured alcohol or equivalent solution. Should be followed by threadlocker GM P/N 12345382 (Canadian P/N 10953489) or equivalent application on bolts before tight installation. Install the engine mount bracket through bolts loosely before positioning the engine mount against the motor and fitting the engine mount-to-engine bolts loosely. Torque the engine mount bracket through bolts to 75 Nm (55 ft. lbs.) at the same time as torqueing the engine mount-to-engine bolts to 50 Nm (37 ft. lbs.). Secure the engine shield in place along with its bolts while tightening them to 20 Nm (15 ft. lbs.) before lowering the engine. The oil pan skid plate together with its bolts should be installed next followed by torquing the bolts to 20 Nm (15 ft. lbs.). First add the engine mount heat shield onto the assembly then install the bolts connecting the engine mount to engine mount bracket and tighten them at 65 Nm (48 ft. lbs.). Reinstall the wheelhouse inner panel before placing both the wheelhouse inner panel push pin retainers and left front tire and wheel and finally lower the vehicle.

OEM GMC Sierra 3500 Engine Mount

11 Engine Mounts found

GMC Sierra 3500 Motor Mount, Green Part Number: 25828247

GMC Sierra 3500 Motor Mount, Driver Side Part Number: 15829219

GMC Sierra 3500 Mount Bracket, Driver Side Part Number: 15871387

GMC Sierra 3500 Motor Mount, Passenger Side Part Number: 15829220

GMC Sierra 3500 Mount Bracket, Passenger Side Part Number: 15113855

GMC Sierra 3500 Mount Bracket, Driver Side Part Number: 15113854

GMC Sierra 3500 Mount Bracket, Driver Side Part Number: 15113852

GMC Sierra 3500 Motor Mount Part Number: 15134285

GMC Sierra 3500 Mount Bracket, Passenger Side Part Number: 15113851

GMC Sierra 3500 Mount Bracket, Passenger Side Part Number: 15113853

GMC Sierra 3500 Mount Bracket, Driver Side Part Number: 15036527

GMC Sierra 3500 Engine Mount

GMC Sierra 3500 Engine Mount Parts and Q&A

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