VITON ACCELERATOR PUMPS USAGE SERVICE REPLACEMENT ONLY

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

CHEVROLET APPLICATIONS

1975 - 1983

ORIGINAL ASSEMBLY REPLACEMENT ASSEMBLY

07048874 17074108

17051117 17074109

17051374 17074104

17054773 17074111

17054791 17074112

17061752 17074114

17062731 17074115

17064155 17074117

17064156 17074118

17071169 17074119

CARB NUMBER REPLACEMENT PUMP ASSY. 1975 CHEVROLET

07045200 17074104 07045220 17074104 07045221 17074104 17055038 17074104 17055040 17074104

1976 CHEVROLET

17055040 17074104 17056200 17074104 17056219 17074104 17056286 17074104 17056503 17074104 17056508 17074104 17056509 17074104 17056518 17074104 17056519 17074104 17056528 17074104

1977 CHEVROLET 17055199 17074104 17057221 17074104 17057512 17074104 17057517 17074104 17058399 17074104 17058463 17074104 17058464 17074104

1978 CHEVROLET

17055736 17074108 17058130 17074108 17058131 17074108 17058132 17074108 17058133 17074108 17058184 17074108 17058186 17074108 17058201 17074108 17058206 17074108 17058282 17074108 17058284 17074108 17058285 17074104 17058397 17074108 17058398 17074104 17058460 17074108 17058465 17074104

CARB NUMBER REPLACEMENT PUMP ASSY.

1978 CHEVROLET

17058466 17074104 17058467 17074104 17058468 17074104 17058509 17074104 17058510 17074104 17058512 17074104 17058586 17074104 17058588 17074104

1979 CHEVROLET

17058474 17074104 17059009 17074112 17059061 17074104 17059065 17074104 17059066 17074104 17059100 17074118 17059101 17074118 17059102 17074118 17059103 17074118 17059104 17074117 17059106 17074117 17059108 17074117 17059110 17074117 17059130 17074117 17059131 17074117 17059132 17074117 17059133 17074117 17059134 17074117 17059135 17074117 17059136 17074117 17059137 17074117 17059138 17074117 17059139 17074117 17059140 17074117 17059141 17074117 17059142 17074118 17059143 17074118 17059144 17074118 17059145 17074118 17059170 17074117 17059171 17074117 17059201 17074104 17059203 17074109 17059205 17074104 17059206 17074104 17059207 17074109 17059208 17074104

CARB NUMBER REPLACEMENT PUMP ASSY.

1979 CHEVROLET

17059209 17074104 17059210 17074104 17059211 17074104 17059212 17074115 17059213 17074115 17059215 17074115 17059216 17074109 17059217 17074109 17059218 17074108 17059222 17074108 17059228 17074104 17059229 17074115 17059282 17074109 17059284 17074109 17059293 17074114 17059309 17074112 17059359 17074112 17059366 17074104 17059368 17074104 17059430 17074117 17059432 17074117 17059434 17074117 17059436 17074117 17059501 17074104 17059502 17074109 17059503 17074104 17059504 17074109 17059505 17074109 17059506 17074104 17059507 17074109 17059508 17074104 17059509 17074104 17059510 17074104 17059512 17074115 17059513 17074115 17059515 17074115 17059520 17074104 17059521 17074104 17059527 17074104 17059528 17074104 17059529 17074115 17059582 17074109 17059584 17074109 17059586 17074104 17059588 17074104 17065723 17074104 17066080 17074109

CARB NUMBER REPLACEMENT PUMP ASSY.

1980 CHEVROLET

17080009 17074112 17080100 17074118 17080102 17074118 17080104 17074117 17080105 17074117 17080106 17074117 17080107 17074117 17080108 17074117 17080110 17074117 17080130 17074117 17080131 17074117 17080132 17074117 17080133 17074117 17080138 17074117 17080140 17074117 17080142 17074118 17080143 17074118 17080144 17074118 17080145 17074118 17080146 17074117 17080147 17074117 17080148 17074117 17080149 17074117 17080170 17074117 17080171 17074117 17080172 17074117 17080173 17074117 17080174 17074117 17080175 17074117 17080201 17074104 17080202 17074109 17080204 17074109 17080205 17074104 17080206 17074104 17080207 17074109 17080212 17074115 17080213 17074115 17080215 17074115 17080224 17074104 17080225 17074104 17080226 17074104 17080227 17074104 17080228 17074104 17080229 17074115 17080282 17074109 17080284 17074109 17080290 17074104

CARB NUMBER REPLACEMENT PUMP ASSY. 1980 CHEVROLET 17080291 17074104 17080292 17074104 17080295 17074104 17080297 17074104 17080298 17074115 17080309 17074112 17080359 17074112 17080502 17074104 17080503 17074104 17080504 17074104 17080506 17074104 17080507 17074115 17080508 17074104 17080511 17074115 17080512 17074115 17080513 17074115 17080516 17074104 17080517 17074104 17080523 17074104 17080524 17074104 17080525 17074104 17080526 17074104 17080527 17074104 17080528 17074104 17080529 17074115 1981 CHEVROLET

17081009 17074112 17081101 17074118 17081103 17074118 17081131 17074119 17081133 17074119 17081134 17074119 17081136 17074119 17081138 17074119 17081140 17074119 17081142 17074118 17081143 17074118 17081144 17074118 17081145 17074118 17081170 17074117 17081171 17074117 17081172 17074117 17081173 17074117 17081174 17074117 17081175 17074117 17081200 17074109

CARB NUMBER REPLACEMENT PUMP ASSY.

1981 CHEVROLET 17081201 17074109 17081202 17074104 17081203 17074104 17081204 17074104 17081205 17074109 17081206 17074109 17081207 17074104 17081211 17074109 17081216 17074104 17081217 17074104 17081218 17074104 17081219 17074104 17081220 17074109 17081222 17074104 17081224 17074104 17081226 17074109 17081227 17074109 17081228 17074104 17081282 17074109 17081283 17074109 17081284 17074109 17081285 17074109 17081290 17074104 17081291 17074104 17081292 17074104 17081296 17074109 17081297 17074109 17081309 17074112 17081329 17074112 17081506 17074104 17081508 17074104 17081524 17074109 17081526 17074109

1982 CHEVROLET

17082130 17074119 17082132 17074119 17082138 17074119 17082140 17074119 17082172 17074117 17082173 17074117 17082174 17074117 17082175 17074117 17082202 17074104 17082203 17074104 17082204 17074104

CARB NUMBER REPLACEMENT PUMP ASSY.

1982 CHEVROLET 17082207 17074104 17082213 17074115 17082216 17074104 17082218 17074104 17082220 17074109 17082221 17074109 17082222 17074109 17082223 17074109 17082224 17074109 17082225 17074109 17082226 17074109 17082227 17074109 17082230 17074109 17082231 17074109 17082234 17074104 17082235 17074104 17082280 17074109 17082281 17074109 17082282 17074109 17082283 17074109 17082288 17074109 17082289 17074109 17082290 17074104 17082291 17074104 17082292 17074104 17082293 17074104 17082296 17074109 17082297 17074109 17082506 17074104 17082508 17074104 17082513 17074115 17082524 17074109 17082526 17074109

1983 CHEVROLE 17083130 17074119 17083132 17074119 17083202 17074104 17083203 17074104 17083204 17074104 17083207 17074104 17083216 17074104 17083218 17074104 17083220 17074109 17083221 17074109 17083222 17074109 17083223 17074109

CARB NUMBER REPLACEMENT PUMP ASSY.

1983 CHEVROLET

17083224 17074109 17083225 17074109 17083226 17074109 17083227 17074109 17083230 17074109 17083231 17074109 17083234 17074104 17083235 17074104 17083236 17074104 17083280 17074109 17083281 17074109 17083282 17074109 17083283 17074109 17083290 17074104 17083291 17074104 17083292 17074104 17083293 17074104 17083298 17074115 17083506 17074111 17083507 17074115 17083508 17074111 17083524 17074115 17083526 17074115

17054922 17074104 17054924 17074104 17054933 17074104

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.