[ChevLoRay]

I believe the correct type of front axle "knuckles" for your truck are what are called Cardon Joints. They're sealed and look like they would swivel....they're round on the back side where they attach to the axle housing. I believe they are lubricated by the oil in the front differential. My book doesn't show any grease fittings on the knuckles. The book also says they're Spicer hypoid gear axle units, and the axle assembly number and production date should be stamped on the left tube assembly.

As for other suspension components having grease fittings, my book shows 20 locations for lubrication, although there are allowances made for different gearboxes and engines. But, you should check the front axle air vents, transfer case, front and rear axles, steering knuckles, drag link, tie rod ends, drive shaft slip yokes, u-joints, control linkage (shifter), wheel bearings, steering gear, throttle linkage and bell crank, brake/clutch pedal springs, rear spring hangers and the usual engine/gearbox lubricants. This is for 4WD vehicles, per the service manual. There very well may be more/less than 20 zerk fittings, but look on either end, top and bottom of any component that can move as it is attached to the chassis. Back when our trucks were new, there were very few sealed components and usual lube jobs were done at 6K mile intervals.