WenmarOpen by Wenmar Pro

Service bulletins for the 2001 GMC Sierra

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

652 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Heating and air conditioning are shown. Show all

Bulletins, newest first
PIT5099G2023-12-26. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
PIP5540J2023-01-30. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM:REAR WINDOW:ELECTRICAL HEATING ELEMENT. This Preliminary information communicates to the technician the need to inspect the induction system for potential icing issues in very cold ambient temperatures. To allow the ice to melt so that it can be drained from the related components. That any of the listed DTC's may set with or without poor engine performance.
PIT5099F2022-07-25. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This Preliminary Information communication provides information to the technician about vehicles that the Heater-Vent-Air Conditioning blows warm air. Before calling General Motors Technical Assistance Center technician will need to have high and low pressures, outside temperature, humidity, and vent temperature.
030848006J2017-12-22. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This informational bulletin provide information for the technicians to repair the rear window defroster contact or tabs.
6092005-09-02. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. A/C LOW PRESSURE SWITCH DIAGNOSIS. *SC
0401390072005-02-17. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. LOSS OF HEATING VENTILATION AIR CONDITIONING. SYSTEM MODE AND OR TEMPERATURE CONTROL. *EH
0401380102005-01-10. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. DIAGNOSTIC INFORMATION TO ACCURATELY DIAGNOSE A/C LOW PRESSURE SWITCH USING NEW KENT MOORE SPECIAL TOOL GE-47742. *TT
30862004-10-04. Service bulletin. EQUIPMENT:APPLIANCE:AIR CONDITIONER. AIR CONDITIONER (A/C) LOW PRESSURE SWITCH DIAGNOSTIC TOOL. CURRENTLY THE A/C LOW PRESSURE SWITCH OPEN/CLOSE PRESSURES CANNOT BE ACCURATELY DETERMINED BY MEASURING PRESSURE AT THE LOW SIDE SERVICE PORT. *TT
0101390072002-03-21. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. SUBJECT REGARDING LOSS OF HVAC SYSTEM MODE AND/OR TEMPERATURE CONTROL. *TT
0101390072002-03-21. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. A CONDITION MAY EXIST WHERE THE CUSTOMER CANNOT CONTROL THE HVAC SYSTEM MODES AND / OR THE TEMPERATURE. *TT
1610012002-03-01. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. SOME 2001 AND 2002 3500 SERIES VEHICLES MAY EXHIBIT A HVAC THAT OPERATES ERRATICALLY BY LOSS OF TEMPERATURE, MODE OR BLOWER SPEED CONTROL, OR THE BLOWER RUN AT KEY OFF. *TT
0801012001-04-06. Service bulletin. VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. SOME CUSTOMER MAY COMMENT THAT THE WINDOWS DO NOT DEFROST ON A TIMELY BASIS. *TT

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.