17488: Service Update – Rear Brake Caliper Bolt Loose or Missing – 2018 Cadillac ATS & CTS

#17488: Service Update – Rear Brake Caliper Bolt Loose or Missing – (Jan 5, 2018)

Subject: 17488 — Rear Brake Caliper Bolt Loose or Missing
Models: 2018 Cadillac ATS
2018 Cadillac CTS

Reference Number: N172125780 Release Date: January 2018
Revision: 00
Attention: This service update includes vehicles in dealer inventory and customer vehicles that return to the dealership for any reason. This bulletin will expire at the end of the involved vehicle’s New Vehicle Limited Warranty period.
Make Model Model Year RPO Description
From To
Cadillac ATS 2018 2018
CTS

Involved vehicles are marked “open” on the Investigate Vehicle History screen in GM Global Warranty Management system. This site should always be checked to confirm vehicle involvement prior to beginning any required inspections and/or repairs.

Condition Certain 2018 model year Cadillac ATS and CTS vehicles may have a condition in which a rear brake caliper bolt may be loose or missing. A loose brake caliper bolt could cause a rattle noise in the rear of the vehicle. A missing bolt could cause a rattle or rubbing noise, or allow the brake caliper to rotate outward and contact the rim.
Correction Inspect the rear brake caliper mounting bolts and related components. Replace any missing caliper mounting bolt, and torque all rear brake caliper mounting bolts.

 

Parts Information

Quantity Part Name Part No.
As Required Bolt/Screw – Rear Brake Caliper Guide Pin 13579698

Due to the small number of vehicles involved and due to limited initial parts availability, dealers are encouraged not to order parts for use as shelf stock. Parts should only be ordered when inspection determines that it is necessary to replace a missing rear brake caliper guide pin bolt.

It is estimated that less than 1% of involved vehicles will require rear brake caliper guide pin bolt replacement. Please order parts accordingly.

Reminder: Parts may be removed from Retail Inventory Management (RIM). Dealers should review the affected parts to confirm RIM managed status. Parts may have quantity limiters in effect.

 

Warranty Information

Labor Operation Description Labor Time Trans. Type Net Item
9103588 Inspect Rear Caliper Bolts, Tighten to Specification.

ADD: Replace Each Missing Caliper Mounting Bolt

0.4

0.1

ZFAT N/A

 

Service Procedure

  1. Remove the left and right rear wheels. Refer to Tire and Wheel Removal and Installation in SI.

left and right rear caliper mounting bolts

  1. Inspect the left and right rear caliper mounting bolts for proper installation.
    • If all 4 bolts appear to be installed correctly, proceed to the Caliper Bolt Tightening Procedure below.
    • If any of the bolts are missing or extremely loose, proceed to the Brake Component Inspection Procedure below.

 

Caliper Bolt Tightening Procedure

Using a backup wrench to hold the brake caliper guide pin

  1. Using a backup wrench to hold the brake caliper guide pin stationary, tighten the 4 caliper guide pin bolts to 36 N.m (27 lb ft).
  2. Reinstall the left and right rear wheels. Refer to Tire and Wheel Removal and Installation In SI.

 

Brake Component Inspection Procedure

  1. If one or more of the caliper mounting bolts are missing or extremely loose, inspect the following components for damage:
    • Caliper housing
    • Caliper mounting bracket
    • Caliper guide pins and seals
    • Brake inner and outer pads
    • Retractor springs
    • Brake rotor
    • Road wheelIf a component is damaged or missing, replace the part using the applicable SI procedure and labor time.
  2. Replace the loose/missing mounting bolt.
  3. Using a backup wrench to hold the brake caliper guide pin stationary, tighten the 4 caliper guide pin bolts to 36 N.m (27 lb ft).
  4. Reinstall the left and right rear wheels. Refer to Tire and Wheel Removal and Installation In SI.

 

Dealer Responsibility

Whenever a vehicle subject to this service update enters your vehicle inventory, or is in your facility for service in the future, and the vehicle is still covered under the New Vehicle Limited Warranty, you must take the steps necessary to be sure the service update correction has been made before selling or releasing the vehicle.

All new, used, GM Certified Used, courtesy transportation vehicles, dealer shuttle vehicles, etc. in dealers’ possession and subject to this bulletin must be held and inspected/repaired per the service procedure of this bulletin before customers take possession of these vehicles. Involved vehicles must be held and not delivered to customers, dealer-traded, released to auction, used for demonstration, or any other purpose.

All GM Certified Used vehicles currently in the dealers’ inventory within the Certified Pre-Owned Inventory System (CPOIS) will be de-certified and must be held and remedied per the service procedure in this bulletin. Upon submitting an accepted/paid warranty transaction in the Global Warranty Management (GWM) system, the vehicle can be re-certified for sale within the CPOIS system, or once again be used in the CTP program.


 

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