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.

2018 Chevrolet Suburban 3500 HD LSFACTORY OEM SERVICE PROCEDURE

Installation Procedure

Fig 1: Battery Tray Bolts And Engine Control Module Bracket

Courtesy of GENERAL MOTORS COMPANY

Install Engine Control Module Bracket (2)

CAUTION:

Refer to Fastener Caution

Install and tighten Battery Tray Bolts (1) (Qty: 2) to 9 N.m (80 lb in)

Fig 2: Engine Control Module Bracket Bolt

Courtesy of GENERAL MOTORS COMPANY

Install and tighten Engine Control Module Bracket Bolt (1) to 9 N.m (80 lb in)
Install the left front wheelhouse liner. Refer to Front Wheelhouse Liner Replacement - Left Side (Chevrolet)
Install Engine Control Module. Refer to Engine Control Module Replacement
Install Auxiliary Battery. Refer to Auxiliary Battery Replacement (9C1)

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.