COLD START STALL (INSTALL NEW PROM)

SUBJECT: COLD START STALL (INSTALL NEW PROM)

MODELS: 1992 C/K TRUCKS AND G VANS WITH 5.OL ENGINE (VIN H-RPO L03)

CONDITION Some owners of 1992 model year C/K trucks and G vans with 5.0 liter V8 engines (VIN H) may comment of engine cold start stall. The potential stall generally occurs when the throttle is slightly opened.

CAUSE Initial cold start stalling was due to lean fueling during cold start operation.

CORRECTION If normal diagnostics and service procedures do not correct the above condition, a revised calibration PROM should be installed (see below).

SERVICE PARTS INFORMATION New New Broadcast PROM Scanner Transmission Emissions Code Part No. I.D.

MD8 (auto) NA5/NA6 BFUS 16193107 3115 MD8 (auto) NB2 (Calif) BFUU 16193109 3135 MG5 (manual) NA5/NA6 BFUT 16193108 3125

Parts are expected to be available April 19, 1993.

WARRANTY INFORMATION

Labor Operation Model Labor Time T0500 C/K 0.6 hr. T0500 G 0.5 hr.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.