Hello, it really depends on the code that they are finding when they scan the system to see what is going on with the system. There is a factory bulleting regarding the air bag system, but it would only apply if the codes on the list are what they are finding when they scan the system.
This PI was superseded to update models. Please discard PIT4011E.
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
You may experience an intermittent or current SIR indicator on the Instrument Panel Cluster (IPC) with DTC B0012 0E, b0013 0E, b0016 0E, b0019 0E, b0020 0E, b0022, b0023 0E, B0033 0E, B0040 0E, or B0042 set in the sensing and diagnostic module (SDM).
Note: This PI only applies to the DTCs as listed above. Example, if you have a dtc B0022 symptom 0D, this pi DOES NOT apply because it is only for a B0022. DTCs B0022 and B0042 will not have symptom codes because they are for older models like the Trailblazer, Envoy, etc, and did not use symptom codes.
Inspect for a loose, missing, or broken Connector Position Assurance (CPA) retainer at the air bag for the set dtc. If loose, remove the connector and reinstall correctly by first pushing the connector body in completely and then pushing in the CPA completely. If the CPA is broken, missing, or will not seat in connector correctly, replace the CPA retainer with part number: 54590003 (Orange CPA) that is located in the connector tray of the terminal repair kit.
Note: If the CPA retainer part number: 54590003 (Orange CPA) can't be located in terminal repair kit, contact Kent Moore Tools @ 1-800-GM-Tools to obtain a new package of 5.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
If you want an example, I had a front end crash and replaced both air bags and winshield, nothing else. The body shop that wanted to fix it included the SDM in it's estimate so that there would be no codes since they couldn't clear them with their scanner. I replaced the air bags myself and noticed I couldn't clear the codes without them comming back. I then went to the dealer where I worked and used the tech2 and cleared all the codes in all modules. I have been code free with no warning lights ever since. It's been two years now and I still have the original SDM in it. They are not cheap.
Just make sure everything is connected properly before clearing codes. Ask yourself, if you replaced one SDM, why would the codes come back unless they were also stored in another module (BCM?). So will they come back again after another $500? Try clearing the codes properly before spending hundreds of dollars.
what these guys are telling you is correct, after you make sure all related componets are replaced and the sdm is programed you should be good to go. its shops like this that make people not trust repair centers.