GM Issues Service Bulletin For 2015 Chevrolet Silverado GMC Sierra Heavy Duty Trucks Over Potentially-Missing Seal

General Motors has issued a service bulletin on its heavy duty pickup trucks — the Chevrolet Silverado HD and GMC Sierra HD — over a potentially-missing seal within the power-steering fluid cooler unit.

The defect: affected vehicles may have been built with a hose connection within the power-steering fluid cooler unit that’s missing a seal.

The hazards: if the vehicle is affected by the defect and is driven, the power-steering system could run low or dry, resulting in difficult steering and possible damage to other parts of the system. And should the power-steering fluid find its way to an ignition point, like a hot exhaust manifold, then it could ignite and cause an under-hood fire.

Affected vehicles:

• 2015 Chevrolet Silverado 2500 HD
• 2015 Chevrolet Silverado 3500 HD
• 2015 GMC Sierra 2500 HD
• 2015 GMC Sierra 3500 HD

The fix: on affected vehicles, GM will inspect the power-steering hoses on both gasoline- and diesel-powered vehicles. If the hoses are in good shape, dealers will replace the power-steering fluid cooler unit, reattach the hoses, fill the system, and check for leaks.

The repairs will be covered under the provisions of the new-vehicle warranty.

Owners should: those looking to find out if their vehicle is included in this GM service bulletin should visit recalls.gm.com. There, owners will be able to enter their Vehicle Identification Number (VIN) to see any open recalls as well as customer satisfaction programs. If the vehicle is part of the service action, customers should take it to a dealer.

Alternatively, customers can call their local dealer with their Vehicle Identification Number (VIN).

Owners can also contact GM customer service with questions by using the following information.

Contacts:

• Chevrolet Customer Service: 1-800-222-1020
• GMC Customer Service: 1-800-462-8782
• GM Technical Service Bulletin (TSB) Number: 14608
• NHTSA Toll Free: 1-888-327-4236
• NHTSA (TTY): 1-800-424-9153
• NHTSA Website: www.safecar.gov