Can auto zone checks the trouble codes on a 2003 suburban?

Yes, AutoZone offers free diagnostic services, including checking trouble codes for vehicles like a 2003 Chevrolet Suburban. You can visit your local AutoZone, and their staff will use an OBD-II scanner to read any stored trouble codes, which can help identify issues with your vehicle. It's a convenient way to get insight into potential problems without incurring a cost.