For 1990-2009 cars

# VITON ACCELERATOR PUMPS USAGE SERVICE REPLACEMENT ONLY

#### MODELS: Current and Past Models Equipped With Dual and Quadrajets - 1975-83

Viton accelerator pumps are now available from WDDGM for service when a customer is using a high aromatic fuel, gasohol or has dry-out conditions stemming from long periods of non-operation.

Two (2) types of viton accelerator pumps are released and must be used in the correct float bowl assembly.

Float bowl assemblies that have the letters "MW" (machined well) embossed next to the throttle position sensor electrical connector use the red lip (with garter spring) viton accelerator pump only. See Figure 1.

Some 1982-83 "MW" float bowl assemblies used during production were assembled with the red viton pump and some were not. If the float bowl assembly does not contain the red viton pump a blue dot will be on the rear of the throttle body near the bolt hole. See Figure 1.

If the letters "MW" are not on the float bowl assembly a blue, thin lip accelerator pump can be used per the part list included with this bulletin. This float bowl assembly has the non-machined pump well and uses the blue, thin lip accelerator pump only.

Viton service replacement pumps are identified as H.D. (Heavy Duty) in the parts book and are shown in Figure 2.

Applications are as follows:

Red Lip (With Garter Spring) Machined Well Only (MW) Blue, Thin Lip Non-Machined Well Only

Dual and Quadrajet pump part numbers:

Red Lip (With Garter Spring) 17072978 Blue, Thin Lip See Parts List

PUMP ASSEMBLIES USED IN DUALJET AND QUADRAJET BUICK

APPLICATIONS FOR 1975-82 (BLUE, THIN LIP)

ORIGINAL PUMP ASSEMBLY REPLACEMENT PUMP ASSEMBLY Non-Machined Wells Only

7048871 17074106

17051117 17074109

17051374 17074104

17064156 - (17082196 Carb Only) 17074118

REPLACEMENT PUMP ASSEMBLIES FOR DUALJET AND QUADRAJET

BUICK APPLICATIONS 1975 - 82

1975 CARB NUMBER REPLACEMENT PUMP ASSY.

7045240 17074106

7045244 17074109

7045246 17074109

7045541 17074106

7045544 17074109

7045548 17074106 1976 17056240 17074106

17056244 17074109

17056246 17074109

17056540 17074106

17056544 17074109

17056546 17074109 1977 17057241 17074109

17055242

17057248

1978 CARB NUMBER REPLACEMENT PUMP ASSY

17058192 17074104

17058240 17074104

17058241 17074109

17058246 17074109

17058249 17074106

17058498 17074104

17058540 17074104 1979 17059180 17074104

17059184

17059190

17059191

17059193

17059194

17059196

17059240

17059241 17074109

17059242 17074104

17059243 17074104

17059247 17074106

17059249 17074106

17059491 17074104

17059492

17059496

1979 CARB NUMBER REPLACEMENT PUMP ASSY.

17059498 17074104

17059540

17059543

17059544

17059546

17059547 1980 17080185 17074104

17080187

17080190

17080191

17080192

17080195

17080197

17080199

17080240

17080241

17080242

17080243

17080244

17080247

17080249

17080491

17080493

1980 CARB NUMBER REPLACEMENT PUMP ASSY.

17080495 17074104

17080496

17080498

17080540

17080542

17080543

17080545 1981 17081190 17074104

17081191

17081192

17081193

17081194

17081196

17081197

17081198

17081199

17081242

17081243

17081245

17081247

17081248

17081249

17081289

1981 CARB NUMBER REPLACEMENT PUMP ASSY

17081294 17074104

17081295

17081492

17081493

17081496

17081497 1982 17082183 17074104

17082192

17082194

17082195

17082196 17074118

17082197 17074104

17082243

17082244

17082245

17082246

17082247

17082248

17082249

17082260

1982 CARB NUMBER REPLACEMENT PUMP ASSY.

17082294 17074104

17082295

17082298

17082299 17082492

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.