Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISENGINE MECHANICALSTARTERBATTERY, CHARGING SYSTEM AND STARTING SYSTEMREPAIR INSTRUCTIONSBATTERY TRAY REPLACEMENT (SECONDARY)INSTALLATION PROCEDURE

2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Installation Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Installation Procedure

Fig 1: Auxiliary Battery Tray And Battery Hold-Down Tray Bolts

Courtesy of GENERAL MOTORS CORP.

Install the auxiliary battery tray to the vehicle.

NOTE: Refer to Fastener Notice .

Install the auxiliary battery tray bolts to the battery tray.
Tighten: Tighten the auxiliary battery tray bolts to 25 N.m (18 lb ft).

Fig 2: Auxiliary Battery, Battery Hold-Down Retainer Bolt And Retainer

Courtesy of GENERAL MOTORS CORP.

Install the auxiliary battery to the auxiliary battery tray.
Install the auxiliary battery hold-down retainer bolt.
Tighten: Tighten the bolt to 25 N.m (18 lb ft).
Connect 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) .
Lower the vehicle.
Install the front battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .

RENDER: 1.0x

NO RELATED

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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.