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HOMESERVICE MANUALSCHEVROLET2008HHR SS, AUTOMATICREPAIR AND DIAGNOSISQUICK LOOKUPSTECHNICAL BULLETINSTECHNICAL SERVICE BULLETINSWHEELS & TIRE SYSTEMPROPER WHEEL INSTALLATION AND WHEEL TORQUE TECHNIQUES (12-03-10-002A)
2008 Chevrolet HHR SS, Automatic

Proper Wheel Installation And Wheel Torque Techniques (12-03-10-002A)

2008 Chevrolet HHR SS, AutomaticSECTION Proper Wheel Installation And Wheel Torque Techniques (12-03-10-002A)
Publication date: 2014-02-21
Reference number: 12-03-10-002A
Supersedes refnos: 12-03-10-002

PROPER WHEEL INSTALLATION AND WHEEL TORQUE TECHNIQUES

PROPER WHEEL INSTALLATION AND WHEEL TORQUE TECHNIQUES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 12-03-10-002A, Date of Issue:  February 21, 2014
Affected Model(s): 2006-2015 GM Passenger Cars and Light Duty Trucks
Supercedes: This bulletin has been revised to add the 2014-2015 model years. Please discard Corporate Bulletin Number 12-03-10-002.
Superceded Bulletin(s): 12-03-10-002, Date of Issue:  November 26, 2012

SERVICE INFORMATION

Some customer may report vibration in the steering wheel or the seat centered at a frequency of 10-14 Hz, between 93-115 km/h (58-72 mph). First order tire/wheel vibration may be misdiagnosed as tire/wheel assembly imbalance or excessive tire Radial Force Variation.

Inappropriate wheel torque methods may cause the wheel and tire assembly to be offset when mounting. This offset causes the mass of the tire and wheel to "orbit" the axis of the hub and creates vibration similar to a tire with high RFV or a tire with an imbalance.

NOTE:

Improper torque may cause distortion of the brake rotor, and may result in variance in wheel mounting that can cause smooth road shake vibration.

PROPER WHEEL INSTALLATION INFORMATION

Remove the tire and wheel assemblies from the vehicle. Index them at least two stud positions from the previous position and re-install them. Tighten using an appropriate torque pattern technique in the three steps below. Do not use torque sticks or an impact driver to tighten wheel lug nuts.

IMPORTANT:

Do not use torque sticks or an impact driver to tighten wheel lug nuts.

  1. With the wheel off of the ground, install all lug nuts hand tight using only a socket.
  2. Snug all lug nuts using a star or "criss-cross" pattern using a hand wrench. Refer to the appropriate illustration for the number of lugs on the wheel being installed.
    GM1255657Courtesy of GENERAL MOTORS COMPANY
    GM156809Courtesy of GENERAL MOTORS COMPANY
  3. Lower the vehicle until there is just enough contact to provide resistance to complete torquing to specification with a torque wrench.
RENDER: 1.0x

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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.