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Service bulletin 010730023B

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 id634815
Published by NHTSA2002-10-09
Manufacturer's number010730023B
Manufacturer's date2002-03-01
Replaces010730023A
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

SOME CUSTOMERS MAY COMMENT ON A HARSH 1-2 UPSHIFT AND THE CHECK ENGINE LIGHT OR SERVICE ENGINE SOON INDICATOR IS ILLUMINATED AND DIAGNOSTIC TROUBLE CODE P1870 SET. *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, Automatic transmission

Trouble codes named

P1870

Vehicles listed
BUICK ROADMASTER1996
CADILLAC ESCALADE1999, 2000
CADILLAC FLEETWOOD1996
CHEVROLET CAMARO1996, 1997, 1998, 1999, 2000
CHEVROLET CHEVROLET TRUCK1996 to 2000
CHEVROLET CORVETTE1996, 1997, 1998, 1999, 2000
GMC GMC1996 to 2000
OLDSMOBILE BRAVADA1996, 1997, 1998, 1999, 2000
PONTIAC FIREBIRD1996, 1997, 1998, 1999, 2000

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
PIP3366C2018-08-20. Service bulletin. This Preliminary information communicates to the dealer technician thatLight Duty Trucks equipped with automatic transmissions and 4 wheel drive may exhibit a condition of grinding/ratcheting type noise when shifting the automatic transmission into park while the transfer case is in 4 wheel drive low (4LO) range. Dealers technician's are advised this condition should be deemed a normal characteristic of 4WD low operation.
PIP53462017-08-15. Service bulletin. This Preliminary Information communication provides information to the technician about cooler line fittings that come with the 4T65E General Motors remanufactured transmission may not be the same as Original equipment manufacturer quick connect verses inverted flare. Dealer will need to contact General Motors Technical Assistance Center for further assistance.
PIT-47222008-12-18. Service bulletin. GMC: FLUID LEAK FROM TRANSMISSION OIL COOLER LINES DUE TO CORROSION. ALL 2000-2006 LIGHT DUTY TRUCKS EQUIPPED WITH THE LIGHT DUTY AUTOMATIC TRANSMISSION. *PE
0307300072007-03-05. Service bulletin. DELAYED ENGAGEMENT WHEN SHIFTING INTO THESE POSITIONS. PARK INTO REVERSE, NUETRAL INTO DRIVE, NUETRAL INTO REVERSE, AND PARK INTO DRIVE. THIS BULLETIN INCLUDES ALL 2000 - 2007 GM LIGHT DUTY TRUCKS. *KB
30602004-09-27. Service bulletin. THE ENGINE DOES NOT STALL WHEN PERFORMING A P1870 DIAGNOSTIC TEST WITH THE TECH 2 SCAN TOOL OR WHEN COMMANDING THE TORQUE CONVERTER CLUTCH ENABLE SOLENOID ON APPLICATIONS THAT DO NOT HAVE THE P1870 DIAGNOSTIC TEST LISTED. 4L60E OR 4L65E TRANSMISSIONS. *TT
030730007A2004-03-04. Service bulletin. ENGAGEMENT TIME OF ELECTRONICALLY CONTROLLED TRANSMISSIONS IN GENERAL MOTORS VEHICLES. VARIOUS MODELS INCLUDING 2000-2006 ALL LIGHT DUTY TRUCKS. *TT
0307300562004-03-04. Service bulletin. 4L60-E AUTOMATIC TRANSMISSION OIL PUMP FIRST AND SECOND DESIGN IDENTIFICATION. *TT
010730038B2004-02-10. Service bulletin. THE SERVICE ENGINE SOON LAMP IS ILLUMINATED, NO 3RD AND 4TH GEAR, THE TRANSMISSION DOES NOT SHIFT CORRECTLY, THE TRANSMISSION FEELS LIKE IT SHIFTS TO NEUTRAL OR A LOSS OF DRIVE OCCURS. *TT
0913032004-01-29. Service bulletin. WHEN USING POWERTRAIN CONTROL MODULE (PCM) 9374997 DEALERS MAY ENCOUNTER PCM CODE P066 OR P1518, A CRANK NO START CONDITION, OR THE INABILITY TO SUCCESSFULLY PROGRAM THE REPLACEMENT PCM. *TT
0307300422003-12-02. Service bulletin. AUTOMATIC TRANSMISSION FLUID LEAK AT REAR OF VEHICLE. *TT