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Lubrication & Maintenance

GM GMT800 Grease Fitting Locations


This is a discussion on GM GMT800 Grease Fitting Locations within the Lubrication & Maintenance forums, part of the TMC TECHNICAL category!
On a GMT800(99-06) truck there are 11 grease fittings, or zerks, that needs to be lubed. I top mine off ...

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Old 08-05-2009, 10:45 AM
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GM GMT800 Grease Fitting Locations

On a GMT800(99-06) truck there are 11 grease fittings, or zerks, that needs to be lubed. I top mine off every 5000 miles or for the conventional oil users, every time you do an oil change, and they usually only need a pump or two.

Before doing the chassis lube, pump a little grease out of the gun to clean out any dirt that may have gotten into it. Also clean off any dirt/grease on each zerk before attaching the grease gun fitting, so you don't pump crud into the joints. Pump enough grease into them until the boot is firm to the touch. Be careful not the pump too much in them and possibly bust the boot.

1 - Drivers side, Upper ball joint
2 - Drivers side, Outer tie-rod end
3 - Drivers side, Lower ball joint
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4 - Drivers side, Inner tie-rod end
5 - Drivers side, Pitman arm (at relay rod)
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6 - Passengers side, Idler arm (at relay rod)
7 - Passengers side, Upper end of idler arm mount
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Close up view of the 90 degree, 6mm, zerk that was replaced on the end of the idler arm, where it connects to the relay rod. With the factory straight zerk, it's next to impossible to get a grease gun fitting on it because of the AC compressor/mount that is above it. If you turn your wheels to the left side you can access the straight zerk.
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6 - Passengers side, Idler arm (at relay rod) (Different view. Same as #6 above)
8 - Passengers side, Inner tie-rod end
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9 - Passengers side, Lower ball joint
10 - Passengers side, Outer tie-rod end
11 - Passengers side, Upper ball joint
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Old 08-05-2009, 11:17 AM
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Great write-up!!!

I plan on doing this tonight after I install the rear leveling kit on my Tahoe.
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Old 08-05-2009, 12:44 PM
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Nice write up John.
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Old 08-05-2009, 01:20 PM
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Nice write up...now forward it to every quick lube place in the country, as they can never seem to find any of them.
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Old 08-05-2009, 06:08 PM
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That's cool. I had no idea there were that many.
Thanks for the writeup.
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Old 08-05-2009, 07:24 PM
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Need to do this...
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Old 08-05-2009, 08:55 PM
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I greased mine a while ago and stupid me I put too much in and the grease oozed out and got on the pads....had to change 'em.Oh well,needed pads & rotors anyway Years ago I bought an air powered grease gun at Pep Boys,works great and not too much $ I also had a flexible hose that I put on it to get into those tight places
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Old 08-05-2009, 10:04 PM
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I greased mine a while ago and stupid me I put too much in and the grease oozed out and got on the pads....had to change 'em.Oh well,needed pads & rotors anyway Years ago I bought an air powered grease gun at Pep Boys,works great and not too much $ I also had a flexible hose that I put on it to get into those tight places
I know what you mean Gramps. Flexible grease hose FTW!!!!

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Old 08-05-2009, 10:18 PM
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Old 01-17-2010, 04:49 PM
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Nice write up, thanks! The idler arm is a real PITA, need fingers that bend backwards to reach them!
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