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Sparky2263
04-30-05, 01:48 PM
.....ya gotta' pay!

File In Section: 06-Engine Emissions

Bulletin No.: 99066F

Date: March, 2003

SPECIAL POLICY

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 February, 2003.

CONDITION

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 the deposits.

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 ownership.

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.

VEHICLES INVOLVED

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.

extreme gmc
04-30-05, 02:48 PM
nice find!!!

03 Rado
04-30-05, 04:31 PM
Very Old news, allmost 2 years ago. And why they added to 02-03 models years that come with the multi tech injectors that are the fix???

Sparky2263
04-30-05, 04:56 PM
You are correct Rado. Bulletin is dated 3/03.

lost0138
05-03-05, 11:43 PM
hey its worth makin the try to see if nything is wrong with ur ish cuz i waited .. come to find out my injectors melted on me and ya it wasent a good sight .. they got this new spider system that is really cool but its a real pain to get the dealer to admit to the bulletiin and they try to charge u for the diganostic .. took me a while but i got it taken care of..

lamerboy
05-04-05, 07:42 PM
If youre making more than 300hp at the crank with a s/c, and supplying extra fuel with an fmu the newstyle multech II injectors they replace the old poppet style with arent a good choice. You'll need well over 100psi of fuel pressure to keep up and it will still lean out on the top end if you dont lock up the injectors first.

Old style poppet injectors will only need about 85psi of fuel pressure for the same application.

I replaced the original poppet style injectors I had in my '99 with the upgraded injectors and ran into this issue. Got a set of low mileage poppet style injectors from fellow s-series owner who converted to a ramjet manifold and everything was good to go again.

Sparky2263
05-05-05, 01:07 AM
Yep, the poppets are the ****. Problem with clogging is people who never use more than the first third of the gas pedal. Bottom 2/3 never gets used, poppets start clogging.