Air Suspension Maintenance

[GM2021]

Have a 2021 Limited with 73K miles. The owner's manual has no info on maintaining the sir suspension system. Works well now, but they all fail eventually. Per Dealer on 1/22/25, there is no standard maintenance, and no air compressor filter that can be replaced on Gen 5 systems. To address my interest in preventive maintenance, the dealer will purge water from the system, change a hose filter, and replace depleted nitrogen. Service Advisor wrote: “…there is one hose that has a filter built into it, we could get that part replaced and put the air ride system under vacuum to pull any moisture that could have accumulated out. He did want me to make sure you understood that it was not a standard maintenance procedure and that does not mean that it wouldn't have any issues in the future. It would be about $650 before taxes to do that.” Any recommendations/thoughts about preventive maintenance? TIA

 

[kapinallinen2]

Have a 2021 Limited with 73K miles. The owner's manual has no info on maintaining the sir suspension system. Works well now, but they all fail eventually. Per Dealer on 1/22/25, there is no standard maintenance, and no air compressor filter that can be replaced on Gen 5 systems. To address my interest in preventive maintenance, the dealer will purge water from the system, change a hose filter, and replace depleted nitrogen. Service Advisor wrote: “…there is one hose that has a filter built into it, we could get that part replaced and put the air ride system under vacuum to pull any moisture that could have accumulated out. He did want me to make sure you understood that it was not a standard maintenance procedure and that does not mean that it wouldn't have any issues in the future. It would be about $650 before taxes to do that.” Any recommendations/thoughts about preventive maintenance? TIA

Waste of time and money IMO.
There is no moisture in the system, as long as it is not leaking out the nitrogen and pumping in air through that filter to maintain pressure.