SLIGHT RAW FUEL ODOR/HIGH TEMP (INSTALL NEW VENT HOSE)

SUBJECT: SLIGHT RAW FUEL ODOR AT HIGH AMBIENT TEMPERATURES (INSTALL NEW VENT HOSE)

VEHICLES AFFECTED: 1992 CADILLAC "E AND K" MODELS ELDORADO, SEVILLE

Some early production 1992 Eldorados and Sevilles may experience a slight raw fuel odor condition in the passenger compartment. This may occur under certain driving conditions such as high ambient temperatures with stop-and-go traffic. The Evaporative Emission Control System (EECS) charcoal canister can become saturated with vapour at low speeds and begin to vent underhood vapour through the canister fresh air inlet. Vapours can then be drawn into the passenger compartment by the climate control system.

A vent hose was added to the charcoal canister fresh air inlet at VIN breakpoints 605393 (Eldorado) and 808007 (Seville). The vent hose is designed to route vapours away from the climate control system and can be installed on vehicles prior to the above breakpoint.

To correct this condition use the following procedure:

1. Remove dust cap from the charcoal canister fresh air inlet and discard. Refer to Figure 1.

2. Insert vent cap, P/N 8640496, into one end of hose using hose, P/N 9438315, cut to length (62 cm/24.5" long). Refer to Figure 2.

3. Install open end of hose over the canister fresh air inlet and clamp with a hose clamp, P/N 15620999. Refer to Figure 1.

4. Route the hose in/out of fuse panel and attach free end of hose to hole on coolant fan support using clip, P/N 3866187, and screw, P/N 11514845. Refer to Figure 2. (NOTE: Vent cap should be positioned vertically.)

For vehicles repaired under warranty use: Labour Time: 0.2 hour.

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.