Chevrolet Silverado / GMC Sierra. Service manual — part 1907

1. Measure the engine movement at the engine mount in order to check for damage to the

rubber portions of the mount.

1. Apply the park brake.

2. Start the engine.

3. Firmly apply and hold the primary brakes.

4. Have an assistant stand to the side of the vehicle in order to observe for engine

movement.

5. Slightly load the engine shifting from drive to reverse a few times.

6. If the engine moves more than 24 mm (0.945 in) from the at rest position, in either

direction, check for loose engine mount bolts.

2. If the engine mount bolt torque is within specifications, check the condition of the engine

mount.

3. Replace the engine mount if any of the following conditions exist:

Heat check cracks cover the rubber cushion surface.

The rubber cushion is separated from the metal plate of the mount.

There is a split through the rubber cushion.

ENGINE MOUNT REPLACEMENT - LEFT SIDE (1500 LY2)

Removal Procedure

destruction of certain drive train components. When a single mount
breaks, the remaining mounts are subjected to abnormally high
stresses.

NOTE:

When raising or supporting the engine for any reason, do not use a
jack under the oil pan, any sheet metal, or the crankshaft pulley.
Due to the small clearance between the oil pan and the oil pump
screen, jacking against the oil pan may cause the pan to be bent
against the pump screen. This will result in a damaged oil pickup
unit.

NOTE:

When raising or supporting the engine for any reason, do not use a
jack under the oil pan, any sheet metal, or the crankshaft pulley.
Due to the small clearance between the oil pan and the oil pump
screen, jacking against the oil pan may cause the pan to be bent
against the pump screen. This will result in a damaged oil pickup

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 11: View Of Engine Mount To Frame Bolts
Courtesy of GENERAL MOTORS CORP.

1. If the vehicle is equipped with four wheel drive (4WD), remove the front drive axle. Refer

to Differential Carrier Assembly Replacement (1500 FWD) or Differential Carrier
Assembly Replacement (2500 4WD) .

2. Lower the vehicle.

3. Remove the left wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left

Side (Chevrolet) or Front Wheelhouse Liner Replacement - Left Side (GMC) .

4. Remove the engine mount to frame bolts (1).

5. Raise and support the vehicle halfway. Refer to Lifting and Jacking the Vehicle .

unit.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 12: Locating Tab On Engine Block
Courtesy of GENERAL MOTORS CORP.

6. Place an adjustable (screw type) jack to the tab (1) located on the engine block.

7. Remove the left side exhaust manifold heatshield. Refer to Exhaust Manifold Heat Shield

Replacement - Left Side (4.8L, 5.3L, 6.0L, and 6.2L) .

IMPORTANT: DO NOT raise and/or support the engine by the crankshaft

balancer, or the oil pan.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado

Fig. 13: View Of Engine Mount To Engine Bolts
Courtesy of GENERAL MOTORS CORP.

8. Remove the engine mount to engine bolts (1).

9. Using the adjustable jack, raise the engine slightly until there is enough clearance to remove

the engine mount.

2008 Chevrolet Silverado 1500

2008 ENGINE Engine Mechanical - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L - Cab & Chassis Sierra, Cab & Chassis Silverado,

Sierra & Silverado