For 1990-2009 cars

# VITON ACCELERATOR PUMPS USAGE SERVICE REPLACEMENT ONLY

ACCELERATOR PUMPS ON QUADRAJET CARBURETOR (1981-1982 4.1L V-6)

Viton accelerator pumps are available from GMWDD for service when a customer is using a high aromatic fuel, gasohol or has dry-out conditions stemming from long periods of non-operation. Viton service replacement pumps are identified as H.D. (Heavy Duty) in the Parts Book. The Viton pump is a blue, thin lip design with no garter spring (refer to Figure 1). The carburetors affected by this service part are listed below:

GMWDD Service Year Car Line Engine Carburetor Number Pump Assembly ---- -------- ------ ----------------- -------------- 1981 C 4.1L V-6 17081248 17074104 E,K 4.1L V-6 17081289 17074104 1982 C 4.1L V-6 17082246 17074104 E,K 4.1L V-6 17082247 17074104

Replacement procedures outlined in Section 6C of the appropriate Service Information Manual should be followed when replacing the accelerator pump.

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.