2021 Western Star 4900 technical service bulletins
117 technical service bulletins and manufacturer communications cover the 2021 Western Star 4900.
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
- CX Advocate for discolored coolant surge tanks (24CSA-20)
- CX Advocate for ConMet Oil Pan Insert Additional Issues
- Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
- CX Advocate for NOx conversion low faults
- Customer Service Annoucement for Heavy-Duty Engine Product (HDEP) Oil Separator Leaks
- Customer Service Annoucement for Discolored Coolant Surge Tank on Heavy Duty Engine Product (HDEP)
- Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
- CX Advocate for benefits of Autoelevate and hydrocarbon faults
- CX Advocate for AutoElevate Disablement Gen5 Engines
- CX Advocate for ConMet Oil Pan Insert Additional Failures
- CX Advocate for NOx conversion low faults
- CX Advocate communication for NOx conversion low faults
- CX Advocate communication for clutch bolts
- Technical Service Bulletin for New Final Drive Over Heat Diagnostic
- Service Solution for Thread Spring Pin Suspension Alignment & Installation
- Customer letter regarding variable speed water pump.
- Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
- Revised Emissions Recall: Cummins DEF Sensor Shortage
- Important Campaign Information letter for FL974
- Emissions Recall: Cummins DEF Sensor Shortage
- Updated Western Star Service Bulletin for HVAC Actuator Replacement
- Western Star Service Bulletin for HVAC Actuator Replacement
- Important Campaign Information Letter for DDC D21M1 Termination Date Extended
- Western Star Service Bulletin for DEF Connector Reinforcement Caps
- HVAC Actuator Wiring Harness
- SF626 Western Star Window Replacement Inspection Notification
- ConMet Front Hub to Rotor Fasteners
- Customer Advisory Letter for HVAC Actuator Wiring Harness
- Western Star Service Solution for Low Voltage Disconnect (LVD) Troubleshooting: Western Star 5700 and New...
- Western Star Service Bulletin for Key Fob ID Retention
- Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown
- Detroit Field Service Campaign for DT12 Transmission Drive Shaft Cover Plug Reseal
- Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown
- Warranty Policy Letter for battery tags
- Tech Talk discussion on suspended accelerator pedal being uncomfortable for ice road operation.
- Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats
- DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to...
- Revised Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14....
- Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available
- Technical Service Letter for Gen 5 DD15 Instrument Panel Oil Pressure Gauge Operation
- Warranty Information Letter for Body Builder/Truck Equipment Manufacturer Demonstration Program.
- Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes
- Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to...
- Western Star Parts Technical Bulletin for Universal Design Floor Mats
- Revised Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance
- Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters
- Warranty Information Letter for Detroit Bearing Failures
- Technical Service Letter for Detroit Bearing Failures
- Tech Talk discussion on Western Star No Start.
- Western Star Service Bulletin for Access to Front Brake Zerk Fittings
- Western Star Service Bulletin for Axle Flange Gasket Replaced with O-Ring
- Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing
- Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing
- Technical Service Letter for SPN 3711 FMI 31 on GHG17 DD15 Trucks.
- Special Publication letter for Two-Filter Fuel System KM59 GEN1 DD15 DD16 Severe Duty High Pressure Fuel...
- Tech Talk discussion on Delayed Wiper Response.
- Western Star Service Bulletin for Powernet Troubleshooting Guide
- Revised Technical Service Letter for Detroit DT12 TCM GHG17 Only; Bootloader Update
- Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14. Due to...
- Revised Service Solution for 20K Detroit Axle King Pin Lube Access
- Portland Truck Plant Paint Changes
- DDC Technical Service Letter for GHG17 DD Platform Heavy Duty Oil Pan Drain Plug Inserts
- Tech Talk discussion on SS 1034711 HADLEY MIRROR
- Western Star Service Bulletin for Connecting the Chassis Harness Connector to the Cab Front Wall 104-Way...
- Detroit Diesel Special Publication informing about Heavy Duty Friction Style Belt Tensioner Kit. This...
- Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change
- Tech Talk discussion about power steering fluid.
- Tech Talk discussion on repair verification for codes like 'low air flow' when a trailer is not available.
- Customer Service Announcement for Release of DiagnosticLink 8.12 Service Pack 2. On Thursday, September 3,...
- Important Campaign Information Letter informing that revised bulletins for Detroit Diesel campaigns...
- Engine and engine cooling
- Service Solution for 20K Detroit Axle King Pin Lube Access
- Detroit Emissions Recall for GHG21 Detroit DD13 Model Year 2020 Software Reprogramming
- Revised letter is to announce a reimbursement available to dealers for travel to a customer's location to...
- Warranty Information Letter informing that to ensure that DTNA policies and service network practices...
- Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance
- Important Campaign Information letter announcing Dealer Travel for Campaign Performance
- Customer Advisory Letter for Torque Validation of Steering Wheel Mounting Bracket Bolts
- Western Star Bulletin for Non-Airliner Rear Suspension Crossmember Fastener Change
- Customer Service Announcement informing that Service Pack (SP) 1 for DiagnosticLinkÃÂÃÂÃÂî 8.12...
- OEM and distributor announcement for DiagnosticLink 8.12 (Build 4527) was made available
- Technical Service Letter for EPA10, GHG14, GHG17 Diesel Particulate Filter (DPF) Compatibility
- Customer Service Announcement for DiagnosticLink Software Update Reminder
- Service Bulletin for Guidelines for Cleaning and Disinfecting Cab Surfaces
- Detroit Field Service campaign for DETROIT Export DD15 and DD13 Valve Lash Adjustment, Throttle Connector...
- Revised Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change
- Warranty Information Letter for a Warranty Service Replacement Engine Program Clarification
- Customer Service Announcement for Release of DiagnosticLink 8.12. On Wednesday, June 10, 2020,...
- Technical Service Letter for DD Heavy Duty Platform Belt Tensioner Change
- Service Solution for Hadley Upper Mirror Glass Vibration
- Warranty Information Letter for Warranty Training Online
- Warranty Policy Letter for Handling for Authorized Service Location Part Transfers
- Warranty Policy Letter for Chassis Progressive Damage Policy Change
- Warranty Policy Letter for Handling Change: Over the Counter Aftermarket Parts Replacement Program
- Warranty Information Letter for Warranty Long Block Program Change
- Customer Advisory Letter for GWR Label Correction
- Service Solution for Lower Radiator Pipe Rubbing on X15 Cummins engine
- Customer Service Announcement saying that Service Pack (SP) 3 for DiagnosticLink® 8.11 Standard and...
- Warranty Policy Letter explaining the Warranty Department is aligning with the frame rail repair policy,...
- Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and...
- Customer Service Announcement saying that Service Pack (SP) 2 for Diagnostic Link 8.11 Standard and...
- Technical Service Letter for DD Platform Heavy Duty, Metal in the Oil and Oil Filter
- Service Solution on Western Star speedometers
- Revision to a Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch
- Service Bulletin for Guidelines for Repairing or Replacing an Electrical Harness
- Service Solution for Western Star Velvac Door Mirror Seal Curling
- Training Solution for Western Star Front Brake Squeal
- Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
- Training Solutions for Fuel Leak Found at High Pressure Fuel Pump Weep Hole for Heavy Duty DD Engines
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