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Service bulletin 3609A

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 id10018537
Published by NHTSA2006-01-06
Manufacturer's number3609A
Replaces3609B
NHTSA componentPOWER TRAIN

NHTSA's summary

HARSH 1-2 SHIFT, MALFUNCTION INDICATOR LAMP ILLUMINATED, DIAGNOSTIC TROUBLE CODE P0894 STORED IN PCM. *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

Transmission and driveline

Trouble codes named

P0894

Vehicles listed
BUICK RAINIER2006
CADILLAC ESCALADE2005, 2006
CHEVROLET AVALANCHE2005, 2006
CHEVROLET COLORADO2006
CHEVROLET CORVETTE2005
CHEVROLET EXPRESS2005, 2006
CHEVROLET SILVERADO2005, 2006
CHEVROLET SUBURBAN2005, 2006
CHEVROLET TAHOE2005, 2006
CHEVROLET TRAILBLAZER2005, 2006
GMC CANYON2005, 2006
GMC ENVOY2005, 2006
GMC SAVANA2005, 2006
GMC SIERRA2005, 2006
GMC SIERRA DENALI2005 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON2005, 2006
GMC YUKON DENALI2005 (the catalog's model; the bulletin names a series or trim of it)
GMC YUKON XL2005, 2006
HUMMER H22005, 2006
HUMMER H32006
PONTIAC GTO2005, 2006
SAAB 9-7X2006

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

Recalls for the same vehicles and component
05V0550002005-02-14. POWER TRAIN:MANUAL TRANSMISSION:SHIFT PATTERN INDICATOR

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
24-NA-1412024-08-15. Service bulletin. GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the dealers to be more careful not to damage the transmissions during removal and to package the core properly for return.
08-07-30-035H2024-06-07. Service bulletin. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
16-NA-3382024-02-17. Service bulletin. This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
PI1394B2024-02-02. Service bulletin. This PI bulletin advises the technician on the proper way to install the pistons in an engine.
03-00-91-001I2023-11-22. Service bulletin. This service bulletin provides a vibration analysis worksheet the technician can use in conjunction with the appropriate Vibration Analysis-Road testing procedure when diagnosing vibration concerns.
23-NA-1532023-09-26. Service bulletin. The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
08-07-30-035G2023-04-22. Service bulletin. This bulletin provides information on the harmful effects of water or ethylene glycol in transmission fluid.
16-NA-3382023-01-05. Service bulletin. This Warranty Admin service bulletin provides guidelines for Dealers Not Required and for Dealers Required to Contact the PQC for engine or transmission assembly replacement and explains the PQC process, GWM Transaction submission, vehicle service record retention and proper handling of assembly returns for Canadian Dealers only.
20-NA-1382022-12-06. Service bulletin. This bulletin provides information on Policies Applicable to All U.S. Dealers for Engine and Transmission Assembly Replacement Under Warranty, Policy or Customer Enthusiasm and information on Submission of Warranty Transaction in Global Warranty Management.
PIP5640A2022-10-17. Service bulletin. This Preliminary Information communication provides information to the technician to not remove the torque converter bolts and start the engine as this may cause damage to the torque converter of the crankshaft on vehicles equipped with an automatic transmission.