That's the air pump for sure. Mine had that same sound when I bought it and it took a while to figure out what it was. Replacement was quick and easy. I didn't the rear shocks at the same time. Unfortunately that didn't fix the rough ride issues I'm having but it did make the pump quiet...
I have a '16 Tahoe LTZ that feels the same as what everyone is saying. I bought it last July, replaced the rear shocks with Dorman magride's, replaced the air pump and when that didn't help I replaced the fronts with TRQ active magride's as well. The ride still isn't right.
I know from...
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