Safety Glasses
Nitrile Gloves
Penetrating Oil
Box Wrench
Ratchets
Sockets
Breaker Bar
Torque Wrench
Rear Shock
Jack
Today, we will be changing the shocks on this 2003 Silverado 1500, and the procedure will be similar on a lot of early Silverados from about 99 to 07, but be sure to know the specifics for your truck before getting started. If you’re not completely comfortable doing this yourself, we’d be happy to recommend a professional technician in your area.
Step 1: Lift Truck Using a Jack
Park on a level surface. Depending on the ground clearance, you may or may not need to lift and support the rear of the truck.
Step 2: Remove Wheel from the Truck
Loosen the lug nuts and remove the wheel from the truck. This will give you more work space when removing and installing a new rear shock.
Step 3: Spray Penetrating Oil on the Bolts
Spraying penetrating oil on the bolts at the top and bottom of the shock absorber can make removing them easier.
Step 4: Remove the Bottom Nut and Bolt
Use a box wrench and breaker bar with a 21mm socket to loosen the bottom nut and bolt securing the shock, and remove it.
Step 5: Remove the Top Nut and Bolt
After removing the bottom nut and bolt, remove the upper shock absorber nut and bolt.
Step 6: Remove the Old Rear Shock Absorber
At this point, you should be able to remove the shock. Set it next to your new shock to make sure you have the right replacement.
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Do It Right: There may be a slight difference in length due to different types of internal rebound bumpers or support springs, but it won’t affect performance. |
Step 7: Prime the New Shock
Before installation, it’s a good idea to prime the shock absorber by fully compressing and letting it extend on its own 4-5 times. This will ensure that the gas and oil are in the proper position inside the shock, and can help prevent unwanted noise when you start driving with the new shock in place.
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Do It Right: Be sure to have the shock upright with the dust boot or metal shield at the top when priming and when installing. |
Step 8: Lift the Shock into Place
Lift the new shock absorber into place.
Step 9: Install the Upper Nut and Bolt
Install the upper nut and bolt first, and finger-tighten.
Step 10: Install the Lower Nut and Bolt
Now, install and finger-tighten the lower nut and bolt.
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Do It Right: If you had to raise the back end of the truck, it’s safe to lower it now. |
Step 11: Torque the Lower Nut and Bolt
Torque the lower nut and bolt to 70 foot pounds to ensure it is tightened properly.
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Do It Right: Always make sure to tighten the shock absorber bolts with the weight of the vehicle on the ground to prevent binding of the bushings in the shocks. |
Step 12: Torque the Upper Nut and Bolt
Torque the upper nut and bolt to 70 foot pounds to ensure it is tightened properly.
The automotive repair work depicted in this series is performed under the direction of the manufacturer of the product featured. Prior to undertaking any of the demonstrated repairs on your vehicle, we suggest you consult with a certified mechanic or another professional who can adequately advise you of the proper repair or remedy required. O’Reilly Automotive Stores, Inc. and its affiliates (“O’Reilly”) disclaims any responsibility for injury or damage resulting from a viewer’s attempt to recreate the repairs shown in this series.