Gmc grease fittings

Go to the auto parts store, take one out and take it in to the store.

You can also leave the grease zerks alone and get one of these for your grease gun instead...

Grease Gun Right Angle Adapter

Like Charles said the best thing to do is take one out, if you can, and shop for a replacement. There are usually 2 types of thread so you can't say for sure until you take the old one out.

Don't forget that there are press-in zerks too, these can be spotted by the fact there's no flats on the zerk, so no way to unscrew them. I wouldn't be surprised to see these as OEM.

I have what sport45 did. Love the 90 degree adapter on the grease gun

I have a 2012 and yes the inner three grease fitting are a bit tough to get to. I first picked up a set of the 90* zerks but found them to be a pain to point in the direction I wanted and also be snug. You have to shim them with small washers to get them to line up the way you want. I ditched them and picked up a 90* adapter for the grease gun. Problem solved and much simpler.

It isn't that bad of a job....

Change out the metal tube to a flex hose

Have NOT had one I could not get at

BenK wrote:
Change out the metal tube to a flex hose

Have NOT had one I could not get at

X2

Buy a quality flex hose that has a quality zerk fitting and it will stay on the zerk while pumping grease. The cheap ones do not grip the zerk very well.

Even with a flex hose on my grease gun the inner three zerk fittings are tough to get at. 90* fitting makes it much easier...

The most difficult one is what I call the eleventh fitting. Many people do not know it is there. It on the idler arm high up where it is attached to the frame.