RobH
Full Access Member
...Is there a Max Trailering Package with everything (break controller, 3.42 ration, etc.) and not rear air...
Upscale models have the Magneride suspension instead of the optional rear air suspension. The three character code on the glove box Service Parts Identification label is Z85 for the air suspension on my LT. The Magneride suspension, RPO Z95 on a couple of YuKon Denali's I considered, also uses an air shock, but one that can have its shock dampening characteristics electronically modified in almost real time.
The air shock "bag" is around the upper portion of the shock. There should be a thin tube connected to it for inflating it. This picture of an Arnott aftermarket shock gives you an idea of what one looks like before it starts living in the splashed up crud under a vehicle.
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