K 3500 Truck 4WD V8-350 5.7L (1993)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
PROM - Exhaust Odor/Cold Start Sag/Cold Hesitation
Group Ref.: Engine Fuel & Emission
Corporate Ref. No.: 376511
Date: September, 1993
SUBJECT:
EXHAUST ODOR/COLD START SAG/COLD HESITATION ON LIGHT ACCELERATION (INSTALL REVISED MEMCAL)
MODELS:
1993 CHEVROLET AND GMC C/K/G TRUCKS W/5.7L (L05) ENGINE UNDER 8600 GVW
CONDITION:
Some owners of 1993 model year C/K Trucks and G Vans with 5.7L (L05) V8 engines (VIN K) may comment on one or all of the following conditions:
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Exhaust odor (H2S).
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Cold start sag.
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Hesitation/flat feel on light acceleration during the warm-up period on cold start.
CAUSE:
Air fuel mixture was not optimally calibrated for all operating conditions.
CORRECTION:
If normal diagnostics and service procedures do not correct any of the above conditions, a revised calibration MEMCAL should be installed (see chart).
