Here's a general outline. Specific details might vary slightly depending on your exact model and any modifications. Always consult your owner's manual for specific instructions and diagrams.
1. Preparation:
* Disconnect the Battery: This prevents accidental short circuits.
* Gather Tools: You'll need a variety of tools, including sockets (various sizes), wrenches (both metric and standard), a ratchet, a jack, jack stands, possibly a pry bar, and potentially a helper. A torque wrench is highly recommended for reassembly.
* Locate and Identify Connections: Before you start, familiarize yourself with all the connections to the bed: tail lights, brake lights, turn signals, license plate light wiring, fuel filler neck, and possibly the backup lights. Take pictures of these connections before disconnecting to aid reassembly.
2. Disconnect Components:
* Tailgate: Remove the tailgate. This usually involves releasing a latch or two and swinging it down.
* Wiring Harnesses: Carefully disconnect all wiring harnesses. Label or photograph each connection for easy reconnection later.
* Fuel Filler Neck: This might require disconnecting a hose clamp and carefully removing the filler neck from the bed.
* Other Connections: Disconnect any other connections between the bed and the frame (e.g., ground straps).
3. Removing the Bed:
* Raise the Truck: Use a floor jack to raise the rear of the truck. Place jack stands securely under the frame rails near the rear axle – never work under a vehicle supported only by a jack.
* Locate Bed Bolts: The bed is typically bolted to the frame. Locate all the bolts. There are usually several along the sides and potentially some at the front.
* Remove Bolts: Carefully remove the bolts using the appropriate sockets and wrenches. Some bolts might be difficult to access.
* Lower the Bed: Once the bolts are removed, the bed should be free to lower. You may need a helper to assist with this step, as the bed can be heavy.
4. Post-Removal:
* Inspect the Frame: Check the frame rails for any damage or rust.
* Clean the Frame: Clean the area where the bed was attached.
5. Reassembly (in reverse order):
* Align the Bed: Carefully align the bed with the frame.
* Install Bolts: Install the bolts and tighten them to the manufacturer's specified torque. Use a torque wrench to avoid stripping the bolts.
* Reconnect Components: Reconnect all wiring harnesses, the fuel filler neck, and any other components that were disconnected.
* Lower the Truck: Carefully lower the truck from the jack stands.
* Test Lights: Test all the lights to ensure they're functioning correctly.
Important Considerations:
* Rust: If the bolts are rusted, they may break. Use penetrating oil to help loosen them. Consider replacing bolts with new ones, especially if they show signs of significant corrosion.
* Weight: Truck beds are very heavy. You'll need assistance to safely lift and maneuver the bed.
* Professional Help: If you're uncomfortable with this process, it's best to seek help from a qualified mechanic. This is a complex procedure.
This is a general guide. Consult a repair manual specific to your 1999 Chevy Silverado for detailed instructions and diagrams. The specific steps and locations of components may vary slightly depending on the trim level and options on your truck. Safety first!
