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Campaign - SCPI Warranty Extension
File In Section: 06-Engine Emissions
Bulletin No.: 99066F
Date: March, 2003
SUBJECT: 99066F - SPECIAL POLICY ADJUSTMENT - SEQUENTIAL CENTRAL PORT
FUEL INJECTION (SCPI) FAILURES IN CALIFORNIA ONLY (YF5 EMISSION EQUIPPED)
MODELS: CERTAIN 1996, 1997, 1998, 1999, 2000, 2001, 2002 S/T, M/L, C/K, G,
P, W4/NPR TRUCKS AND 2003 NPR TRUCKS EQUIPPED WITH 4.3L (RPO L35 - VIN
CODE W OR RPO LF6 - VIN CODE X), 5.0L (RPO L30 - VIN CODE M) OR 5.7L (RPO
L31 - VIN CODE R) ENGINE AND CALIFORNIA EMISSION EQUIPPED (RPO YF5)
This bulletin is being revised to add the 2002 and 2003 model years to the
SCPI Special Policy on certain S/T, M/L, C/K, G, P and W4/NPR truck
models. Please discard Special Policy Bulletin Number 99066E, dated
Some customers of 1996, 1997, 1998, 1999, 2000, 2001, 2002 model year S/T,
M/L, C/K, G, P, W4/NPR trucks and 2003 NPR trucks, that are registered in
California, equipped with 4.3L (RPO L35 and VIN Code W, or RPO LF6 and VIN
Code X), 5.0L (RPO L30 and VIN Code M) or 5.7L (RPO L31 and VIN Code R)
engine, and California emissions (RPO YF5), 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). The deposit build-up may cause injector poppets to stick closed.
Certain fuels have been found to interact with the SCPI system to cause
SPECIAL POLICY ADJUSTMENT
This special policy covers the SCPI failure condition described above for
a period of ten (10) years or 200,000 miles, whichever occurs first, from
the date the vehicle was originally placed in service, regardless of
The repairs will be made at no charge to the owner. This special policy
applies ONLY to repairs requiring SCPI system servicing, injector cleaning
and/or MFI assembly replacement of the SCPI system. The customer should
not be charged for performing a system check when it is determined that
the SCPI system is not the cause of a customer complaint (labor operation
T5532 is provided to submit claims for such system checks). Any additional
necessary diagnosis and repairs that are not related to the SCPI condition
are not covered by this special policy. The customer should be informed
that any further service that is not covered by new vehicle warranty will
not be covered by this policy.
Involved are certain 1996,1997,1998,1999, 2000, 2001, 2002 S/T, M/L, C/K,
G, P, W4/NPR and 2003 NPR model vehicles, registered in California,
equipped with 4.3L (RPO L35 - VIN Code W, or RPO LF6 - VIN Code X), 5.0L
(RPO L30 - VIN Code M) or 5.7L (RPO L31 - VIN Code R) engine; and
California emissions (RPO YF5). This Special Policy covers all vehicles
within these model years, with these engine and emissions RPO's.
Parts required to complete this special policy are to be obtained from
General Motors Service Parts Operations (GMSPO). Please refer to your
"involved vehicles listing" prior to ordering parts. Normal orders should
be placed on a DRO Daily Replenishment Order. In an emergency, parts
should be ordered on a CSO = Customer Special Order.
IMPORTANT :Isuzu Parts Ordering: In order to comply with the 10-digit
Isuzu part numbering system, Isuzu dealers must add an "8" to the
beginning and a "0" to the end of the listed 8-digit part numbers when
ordering parts through AIPDN.
Customers will be notified of this special policy on their vehicles by
General Motors (see copy of typical customer letter included with this
bulletin - actual divisional letter may vary slightly).
System Check: Use strategy-based diagnoses listed in the front of the
Driveability and Emissionssection of the service manual. If the SCPI
system is operating properly, inform the customer that the vehicle does
not have the condition listed in the owner letter. If poor driveability
conditions persist, inform the customer that any further diagnosis and
repairs will be at their expense if the vehicle is outside the parameters
of the new vehicle warranty.
SCPI Injector Cleaning Procedure: If diagnosis leads to sticking poppet
nozzles, use the service procedure from Service Bulletin 00-06-04-003B to
clean the SCPI poppet nozzles. Please note that the service bulletin term
for SCPI is Central Sequential Fuel Injection (CSFI), but is referring to
the same fuel system assembly. If the poppet nozzles have previously been
cleaned and the sticking condition has reoccurred, refer to the correction
SCPI Fuel Tank Fill Pipe Assembly for 1997-99 M/L Van and 1999 - some 2000
C/K Truck: with 4.3L, 5.0L, 5.7L engines and built prior to listed
VIN/Production dates on Service Bulletin 00-06-04-018: If diagnosis leads
to sticking poppet nozzles on these models, use the service procedure from
Service Bulletin 00-06-04-018 to replace the fuel tank fill pipe assembly,
if this procedure has not been performed previously. Previous service
procedure can be verified by checking GMVIS for Labor Operation L1065 on
"M/L" trucks with replacement part number 15050573; or Labor Operation
L1065 on "C/K" trucks with replacement part numbers 15747585 or 15747588.
Correction: If, after cleaning the SCPI poppet nozzles, the normal service
manual diagnosis still indicates that the SCPI is the cause of the
customer complaint, or if the injectors have previously been cleaned and
the vehicle has again experienced sticking poppet nozzles, refer to
Service Bulletin 00-06-04-003B and replace the SCPI fuel assembly with the
MFI fuel assembly. Please note that the service bulletin term for SCPI is
Central Sequential Fuel Injection (CSFI), but is referring to the same
fuel system assembly.
For vehicles repaired under this special policy, submit a claim with the
Customer requests for reimbursement are for any previously paid repairs
to, or replacement of, the Sequential Central Port Fuel Injection (SCPI)
system. Repairs must have occurred within 10 years of the date the vehicle
was originally placed in service, or 200,000 miles, whichever occurs
first. The requests are to be submitted within two (2) years of the date
on which the repair was paid or within two (2) years of the date of this
Special Policy Bulletin, whichever is greater.
When a customer requests reimbursement, they must provide the following:
- Proof of ownership at time of repair.
- Original paid receipt confirming the amount of unreimbursed repair
expense(s) (including Service Contract deductibles), a description of the
repair, and the person or entity performing the repair.
Customers from the State of California, must submit requests for
reimbursement directly to (Divisions) per instructions in the owner
If the work was done by someone other than a GM dealership, the amount of
reimbursement will be limited to the amount that the repair would have
cost GM to have it completed by a GM dealership.