2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6FACTORY OEM SERVICE PROCEDURE

Removal Procedure

  1. Disconnect the battery negative cable from the battery negative terminal. Refer to Battery Negative Cable Disconnection and Connection .
  2. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  3. Disconnect the auxiliary battery positive and negative cables. Refer to Battery Positive Cable Replacement (4.3L)  or Battery Positive Cable Replacement (4.8L, 5.3L and 6.0L)  or Battery Positive Cable Replacement (6.6L - Primary)  or Battery Positive Cable Replacement (6.6L - Auxiliary)  and Battery Negative Cable Replacement (4.3L)  or Battery Negative Cable Replacement (4.8L, 5.3L and 6.0L)  or Battery Negative Cable Replacement (6.6L - Primary)  or Battery Negative Cable Replacement (6.6L - Auxiliary) .
  4. Remove the auxiliary battery hold-down retainer bolt.
    5. Fig 1: Auxiliary Battery, Battery Hold-Down Retainer Bolt And Retainer
    GM184057Courtesy of GENERAL MOTORS CORP.
  5. Remove the auxiliary battery from the auxiliary battery tray.
    6. Fig 2: Auxiliary Battery Tray And Battery Hold-Down Tray Bolts
    GM105147Courtesy of GENERAL MOTORS CORP.
  6. Remove the auxiliary battery hold-down tray bolts.
  7. Remove the auxiliary battery tray from the vehicle.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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