2018 Chevrolet Low Cab Forward 4500 technical service bulletins

Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.

• Nov 7, 2026 Service bulletinUnknown or other
• Sep 26, 2026 Service bulletinThis PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it.
• Sep 4, 2026 Service bulletinUnknown or other
• Jul 21, 2026 Service bulletinPI to help diagnose A/C concern
• Apr 1, 2026 Service bulletinUnknown or other
• Mar 9, 2026 Service bulletinUnknown or other
• Nov 22, 2019 Service bulletinPower train
• Oct 29, 2019 Service bulletinThis informational bulletin provides information on Driveline Clunk Noise and what is acceptable and what...
• Oct 22, 2019 Service bulletinTHis Informational bulletin provides important instructions for contacting the Fleet Action Center for...
• Oct 22, 2019 Service bulletinThis informational bulletin provides the dealer with key information for cutting a new key.
• Oct 2, 2019 Service bulletinThis informational bulletin provides information on comebacks prevention information and using customer...
• Sep 30, 2019 Service bulletinThis Informational Bulletin provides information on availability of Diesel Fuel additives.
• Sep 20, 2019 Service bulletinThis diagnostic tip provides additional information on how to diagnose a possible valve, lifter or...
• Sep 18, 2019 Service bulletinThis warranty administration bulletin provides information regarding the field action courtesy...
• Sep 17, 2019 Service bulletinEngine and engine cooling
• Sep 6, 2019 Service bulletinElectrical system
• Aug 15, 2019 Service bulletinThis informational bulletin provides information on replacing the intake manifold when the engine is...
• Aug 13, 2019 Service bulletinThis informational bulletin provides information on Internal Engine Noise or Damage After Oil Filter...
• Aug 5, 2019 Service bulletinThis technical bulletin provides a procedure inspecting for excess grease or Sealant on the Exterior of...
• Jul 30, 2019 Service bulletinEquipment
• Jul 23, 2019 Service bulletinFuel system, gasoline
• Feb 26, 2019 Service bulletinThis informational bulletin provides the dealer with information on what to do when requesting a new key...
• Dec 14, 2018 Service bulletinThis warranty administration bulletin provide policy information for automatic transmission Oil Cooler...
• Apr 27, 2018 Service bulletinThis informational bulletin provides information on Audio Volume Stuck High or Low with No DTCs and that...
• Apr 25, 2018 Service bulletinThis bulletin provides information on approved warranty part numbers for original equipment batteries.
• Apr 20, 2018 Service bulletinThis informational bulletin explains to the dealer how to cover a possible customers mistake when a fuse...
• Apr 9, 2018 Service bulletinThis informational bulletin provides information on approved warranty part numbers for original equipment...
• Apr 6, 2018 Service bulletinStructure: frame and members: underbody shields
• Apr 5, 2018 Service bulletinThis Technical Bulletin provides information to correct a customer concern of a siren or whine noise from...
• Dec 19, 2017 Service bulletinEngine and engine cooling
• Nov 30, 2017 Service bulletinThis technical bulletin provides a procedure to clear the codes and re-evaluate the XM radio channels to...
• Nov 22, 2017 Service bulletinThis bulletin describes the Dealer special tool loan program process.
• Nov 7, 2017 Service bulletinFuel system, gasoline
• Aug 31, 2017 Service bulletinThis informational bulletin provides information on Intake Manifold Inspection/Replacement After Severe...
• Aug 22, 2017 Service bulletinThis informational bulletin provides information on OnStar® VCIM is currently restricted parts
• Aug 2, 2017 Service bulletinThis warranty administration bulletin provide policy information on warranty and policy exchange program...
• May 22, 2017 Service bulletinThis informational bulletin provides information on Chemical Staining, Pitting, Corrosion and/or Spotted...
• May 17, 2017 Service bulletinThis informational bulletin advises the possible issues that may occur using a scotch brite pad or highly...
• May 15, 2017 Service bulletinThis informational bulletin provides information on General Motors Dealership Critical Equipment...