* Front suspension: These are usually the most numerous. Look for them on the upper and lower ball joints, the tie rod ends (if they are greaseable – some are not), and the steering knuckles (especially on 4x4 trucks).
* Rear suspension: Leaf spring shackles are a common location on leaf-sprung trucks. Depending on the configuration, you might also find them on the leaf spring pins themselves. U-bolts usually are not greaseable. If it has a rear differential, there will likely be one or more on the differential housing.
* Driveshaft: If it's a 4x4, the front driveshaft U-joints will have zerks. Rear driveshaft U-joints might as well depending on the configuration.
* Wheel bearings (on some models): Some models had greaseable wheel bearings, while others are sealed. If yours are greaseable, they'll be located in the hubs.
* Kingpins (4x4): 4x4 trucks often have grease fittings on the kingpins.
To find them: The best approach is to:
1. Consult your owner's manual: This is the most reliable source for your specific truck. It should have a lubrication chart showing the locations.
2. Get under the truck: Use a jack and jack stands for safety. Inspect the suspension components, steering linkage, and drivetrain carefully. Grease zerks are usually easily visible, small metal fittings with a pointed end.
3. Use a grease gun: Once you locate them, use a grease gun to lubricate each fitting.
Important Note: If you're not familiar with lubricating zerk fittings, it's best to have a qualified mechanic do it. Over-greasing can damage components.
