1999-2006 Silverado Crankshaft Pulley Replacement
The crankshaft pulley is a wheel that mates directly to your Silverado’s crankshaft. The pulley delivers power to other components through your Silverado’s pulley system, such as your air conditioning compressor. If the pulley slips, it can damage your Silverado’s crankshaft, which will cause severe damage to your engine.
Follow these easy steps to replace your Silverado’s crankshaft pulley.
- Adjustable wrench
- Socket wrench
- High output impact wrench
- Pulley puller kit
1. Disconnect the negative battery cable from the battery and place it in a secure position away from the battery.
2. Engage the emergency brake and, if needed, lift your Silverado and place it on jack stands.
3. Since the crankshaft pulley is routed to your accessories via the serpentine belt, the belt will need to be loosened and lifted up off of the pulley. Find the mounting brackets for these accessories and loosen them, then pull the accessories towards the engine to provide slack in the serpentine belt. Once the belt is given enough slack, it can be pulled away from the crankshaft pulley.
4. Locate the crankshaft pulley at the lower front of the engine and remove the serpentine belt.
5. Use an impact wrench to remove the center bolt from the pulley.
Notice: it is recommended to soak the bolt in penetration catalyst beforehand to make the bolt easier to remove.
6. Assemble the pulley puller, and locate three bolts included in your kit that will fit the holes in pulley.
Notice: follow the directions provided with your puller kit to ensure you use the correct components to avoid damaging the crankshaft.
7. Place the large rod into the center hole of the pulley, and thread the three bolts through the puller plate and into the pulley.
8. Take an appropriately sized socket, and place it at the end of the large rod. Then take your socket wrench to the large rod and take the pulley out.
1. Install the new pulley on the snout of the crankshaft, and torque it down to 240 lb-ft using the old pulley bolt.
Notice: you can use a longer bolt to get the pulley started on the crank to about a half of an inch. If you do it for any further, you chance breaking the bolt off in the snout of the crank.
2. Once the new pulley is seated properly on the crank, remove the old bolt and torque the new pulley bolt at first pass to 37 lb-ft, then tighten the bolt a second pass to 140 degrees.
3. Re-route serpentine belt and secure all accessories.
You’re all done, nice job!