1999 GMC W Series

Service bulletins

Technical service bulletins and other communications the manufacturer sent dealers about this vehicle. Ask a dealer for the full document by its number.

• 10248444Vehicle Recalls
• 10246631Expanded Availability for Remanufacture and Return (R&R) Electronic Control Modules
• 10244945The following information is provided to clearly explain Isuzus policy for control module (engine, transmission, antilock brake, instrument panel, body control, power interface, etc.) reprogramming. Control module calibrations are regularly updated for many reasons. These reasons may include, but are not limited to: model year change, software corrections, certification compliance, product improvement and specific application requirements. However, the mere existence of a newer control module calibration does not necessarily mean that warranty coverage exists or that the calibration must be installed. It is not our policy to update control modules, under warranty or after warranty, based solely on the availability of a newer calibration file. Below are our guidelines for reprogramming control modules.
• 10232287This warranty administration bulletin provides information regarding the field action courtesy transportation policy.
• 10190934Underbody 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.
• 10190933Underbody 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.
• 10190932Refinishing 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.
• 10190931Refinishing 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.
• 10082506This 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.
• 10053488Isuzu: installation of a three bond 1215 part IS recommended when installing the kingpin sealing plug.
• 10053487Isuzu: mainenance and lubrication reminder of the front axle kingpin. This IS important for the steering system.
• 10012666Availability of new fuel injection pump oil supply pipe for replacement after removal.
• 10008676Aisin automatic transmission fluid service reminder. 2005 isuzu npr/nqr included.
• 10008497Information on isuzu diesel engine turbocharger diagnostics. Also includes 2005 isuzu n-series and chevrolet and GMC w-series.
• 10005575Mi-tics injection pump exchange program/warranty guidelines effective october 1, 2003.
• 10005565Automatic transmission oil cooler flushing on certain medium duty tilt cab models and commercial models including model year 2004.
• 10005183Vehicle no-start in extreme cold.
• 10005153Throttle position sensor replacement procedure.
• 10004740Approved aisin automatic transmission on-vehicle repairs. 2004 models included.
• 10004380Replacement of output flange nut when servicing transmission. Also includes 2004 models.
• 10004352Clarion radio exchange program and audio system troubleshooting. 1995-96 chevrolet w6-7hv; 1995-98 chevrolet W4-5; 1997-2004 chevrolet f-model; 1999-2004 chevrolet w series; 1999-2004 chevrolet wt5500 series; 1995-96 GMC w6-7hv; 1995-98 GMC W4-5; 1997-2004 GMC f-model; 1999-2004 GMC w series; 1999-2004 GMC wt5500 series and various other models.
• 10004320Engine oil leak at vacuum pump oil supply pipe.
• 10004305Proper positioning of fuel injection pump primer handle after use.
• 10002940Harsh shifting, delayed upshifts with possible check trans lamp illuminated, possible diagnostic trouble code (dtc) 21 set. To include 2004 models.
• 10002444Release of new tools for service: j 37228 - oil pan seal cutter, j 41736 - installer (rear output shaft seal) and dt 46717 - rear output shaft seal remover.
• 10000957Vehicle no-start in extreme cold.
• 635016Subject regarding harsh shifting, delayed upshifts, possible check trans lamp illuminated, possible diagnostic trouble code 21 stored in the transmission control module (tcm) memory.
• 634929Harsh shifting, delayed upshifts, possible check trans lamp illuminated, possible diagnostic trouble code 21 stored in tcm memory.
• 629591Subject regarding at oil temp light on with diagnostic trouble code 15 set.
• 629496Subject regarding aisin automatic transmission flase diagnostic trouble code 11 set.

Every GMC W Series model year

Bars are owner complaints, dots mark years with recalls. Select a year to open its report.