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.

2001 GMC C3500 HD 8.1 G, StandardFACTORY OEM SERVICE PROCEDURE

Installation Procedure

Fig 1: Air Cleaner Assembly & Mounting Bolt

Courtesy of GENERAL MOTORS CORP.

Install the air cleaner assembly.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the air cleaner assembly mounting bolts.
Tighten: Tighten the mounting bolts to 25 N.m (18 lb ft).
Install the air cleaner filter with the inlet elbow attached.

Fig 2: Air Cleaner Cover Clips

Courtesy of GENERAL MOTORS CORP.

Install the air cleaner cover to the housing and clip the air cleaner cover into place.
Install the MAF sensor electrical connector (L56 only).

Fig 3: Air Cleaner Inlet Elbow, Turbocharger Inlet Elbow & Clamp

Courtesy of GENERAL MOTORS CORP.

Install the air cleaner inlet elbow to the turbocharger inlet elbow and tighten the clamp.
Tighten: Tighten the inlet elbow clamp to 5 N.m (44 lb in).

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.