Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules

This warranty administration bulletin provides information regarding the field action courtesy transportation policy.  

Underbody Component Corrosion    The following information may be helpful when addressing underbody component corrosion with customers.  Some customers may comment that one or more of their vehicle's underbody components are showing some form of corrosion.  This corrosion may be red in appearance (rust) if the component is steel, forged iron or cast iron.  This corrosion may also be grey or white in color if the component is constructed of an aluminum alloy.  

Refinishing Aluminum Wheels    This bulletin updates General Motor's position on refinishing aluminum wheels. GM does not endorse any  repairs that involve welding, bending, straightening o re-machining. Only cosmetic refinishing of the wheel's  coatings, using recommended procedures, is allowed.  Evaluating Damage  In evaluating damage, it is the GM Dealer's responsibility to inspect the wheel for corrosion, scrapes, gouges, etc. The Dealer must insure that such damage is not deeper than what can be sanded or polished off. The wheel must be inspected for cracks. If cracks are found, discard the wheel. Any wheels with bent rim flanges must not be repaired or refinished.  Wheels that have been refinished by an outside company must be returned to the same vehicle. The Dealer must record the wheel ID stamp or the cast date on the wheel in order to assure this requirement. Refer  to Refinisher's Responsibility  Outside Company later in this bulletin.  

THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO REPROGRAM THE MEDIA DISC PLAYER WITH THE LATEST CALIBRATIONS TO CORRECT A CONDITION OF THE REAR ENTERTAINMENT SYSTEM NOT OPERATING AS INTENDED IN COLDER AMBIENT TEMPERATURE AREAS DUE TO CALIBRATION CONCERNS.  

SUBJECT REGARDING A HARD, NO START OR EXCESSIVE GRAY OR WHITE SMOKE CONDITION ON START UP AFTER RECENT GLOW PLUG REPLACEMENT.       *TT

GMC R3500

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