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Service bulletin 161001

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id628006
Published by NHTSA2002-03-01
Manufacturer's number161001
Manufacturer's date2001-10-16
NHTSA componentVISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM

NHTSA's summary

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

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Glass, wipers and mirrors, Heating and air conditioning

Vehicles listed
CADILLAC ESCALADE2002
CHEVROLET 3500 SERIES (the catalog's model; the bulletin names a series or trim of it)
CHEVROLET CHEVROLET TRUCK2000 to 2002
GMC 3500 SERIES
GMC GMC2000 to 2002
GMC SIERRA2001

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
PIT5099G2023-12-26. Service bulletin. 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. 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. 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.
PIT5099E2020-08-10. Service bulletin. 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.
PIT5099D2018-11-13. Service bulletin. 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.
PIT5099C2018-08-06. Service bulletin. 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.
05-08-48-001C2018-06-04. Service bulletin. This informational bulletin provides a revision for 05-08-48-001B to add 2010-2014 model years and update Labor Operation.
10-08-64-002B2018-05-21. Service bulletin. This warranty administration bulletin provides information on what should be considerd warranty damage or damage that was at fault of the cutomer and how to properly claim them on the warranty paperwork
PIT5099A2018-05-07. Service bulletin. 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. This informational bulletin provide information for the technicians to repair the rear window defroster contact or tabs.