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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSBUICK2006TERRAZA CXL, 3.5 L, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 101 (ENGINE CONTROL SYSTEM - 3.8L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSPOWERTRAIN CONTROL MODULE (PCM) REPLACEMENTINSTALLATION PROCEDURE

2006 Buick Terraza CXL, 3.5 L, AWD

Installation Procedure

2006 Buick Terraza CXL, 3.5 L, AWDSECTION Installation Procedure

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the PCM to the PCM electrical connectors (4).
Tighten: Tighten the connectors to 8 N.m (71 lb in).
Install the PCM and the wiring harness to the air cleaner housing assembly (3).

Fig 1: View Of Air Cleaner Housing, Bolts, PCM & Harness

Courtesy of GENERAL MOTORS CORP.

Install the air cleaner housing cover (1).
Install the air cleaner housing cover screws (2).
Tighten: Tighten the screws to 4 N.m (35 lb in).
Install the air cleaner intake duct. Refer to Air Cleaner Intake Duct Replacement .
Install the left front inner fender brace. Refer to Brace Replacement - Front Fender Upper Diagonal in Body Front End.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (L26) or Battery Negative Cable Disconnect/Connect Procedure (LY7) in Engine Electrical.
The new PCM must be programmed. Refer to Control Module References in Computer/Integrating Systems.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.