Express 2500 V8-6.6L DSL Turbo VIN 2 (2007)
3. Install the auxiliary battery to the auxiliary battery tray.
4. Install the auxiliary battery hold-down retainer bolt.
Tighten the bolt to 25 N.m (18 lb ft).
5. Connect the auxiliary battery positive and negative cables.
6. Lower the vehicle.
7. Install the front battery negative cable.