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Service bulletin 99066C

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 id619002
Published by NHTSA2001-05-10
Manufacturer's number99066C
Manufacturer's date2000-11-01
Replaces99066B
NHTSA componentFUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS

NHTSA's summary

SOME VEHICLES MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD-UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *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

Fuel system, Fuel injection

Vehicles listed
CADILLAC C/K SERIES1999
CHEVROLET C/K SERIES1996 to 1999
CHEVROLET G SERIES1996
CHEVROLET G SERIES1997 to 1999
CHEVROLET M/L1997 to 1999
CHEVROLET M/L SERIES1996
CHEVROLET P SERIES1996 to 1999
CHEVROLET S/T SERIES1996 to 1999
CHEVROLET W41996, 1997, 1998, 1999
GMC C/K SERIES1996 to 1999
GMC G SERIES1996 to 1999
GMC M/L SERIES1996 to 1999
GMC P SERIES1996 to 1999
GMC S/T SERIES1996 to 1999
GMC W41996, 1997, 1998, 1999
OLDSMOBILE T SERIES1996 to 1998

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
G-1971512017-02-23. Service bulletin. 00064H - SPECIAL COVERAGE (REVISED PART INFORMATION). SOME CUSTOMERS MAY EXPERIENCE A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP. THIS SPECIAL POLICY APPLIES ONLY TO ELECTRONIC DIESEL-FUEL INJECTION PUMP REPAIRS AND/OR REPLACEMENT AS A RESULT OF INJECTION PUMP FAILURE. THIS SPECIAL COVERAGE DOES NOT COVER: GLOW PLUGS, TURBOCHARGER WEAR, LOW COMPRESSION ENGINES OR PCM/PCM WIRING CONDITIONS.
00064C2002-11-01. Service bulletin. A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEAKING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD / NO STARTS, HESITATION, AS WELL AS ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
00064B2002-04-02. Service bulletin. SOME CUSTOMERS MAY EXPERIENCE A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP. *JG
00064B2002-03-22. Service bulletin. SPECIAL POLICY ADJUSTMENT FOR VEHICLES EXPERIENCING A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEADING TO COMPLAINTS OF POOR PERFORMANCE OF FUEL ECONOMY, HARD/ NO STARTS, HESITATION, AS WELL AS ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
00064A2001-05-18. Service bulletin. SPECIAL POLICY ADJUSTMENT FOR VEHICLES EXPERIENCING A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP LEADING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD / NO STARTS, HESITATION, AS WELL AS ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
00064A2001-05-17. Service bulletin. SOME VEHICLES MAY EXPERIENCE A FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEADING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD / NO STARTS, HESITATION, AS WELL AS ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
000642001-05-11. Service bulletin. DEDUCTIBLE REIMBURSEMENT CLARIFICATION AND VIN BREAKPOINT CORRECTION TO 00064 - SPECIAL POLICY ADJUSTMENT - ELECTRONIC DIESEL-FUEL INJECTION PUMP FAILURE - REPAIR / REPLACE. *TT
000642000-12-05. Service bulletin. FAILURE OF THE ELECTRONIC DIESEL FUEL INJECTION PUMP, LEADING TO COMPLAINTS OF POOR PERFORMANCE OR FUEL ECONOMY, HARD / NO STARTS, HESITATION, ILLUMINATION OF THE SERVICE ENGINE SOON LIGHT. *TT
99066A2000-06-06. Service bulletin. SOME VEHICLES MAY EXPERIENCE A SERVICE ENGINE SOON LIGHT, MISFIRE, ROUGH IDLE OR HARD START DUE TO A DEPOSIT BUILD UP ON THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) POPPET VALVE(S). *TT
990662000-01-14. Service bulletin. SPECIAL POLICY ADJUSTMENT COVERING THE SEQUENTIAL CENTRAL PORT FUEL INJECTOR (SCPI) FAILURE CONDITION. *TT