Contents Wiring diagrams Section: General Servicing - All Makes All sections

A/c System General Servicing: Component Locations GMC Pickup C2500

VehicleHighLow
Passenger Cars (1)
"A" Body(2)(3)
"B" Body(4)(3)
"C" Body(5)(3)
"D" Body(6)(3)
"E" Body(7)(3)
"F" Body(4)(3)
"H" Body(5)(3)
"J" Body(4)(3)
"K" Body(7)(3)
"L" Body(4)(3)
"N" Body(4)(3)
"W" Body(5)(3)
"Y" Body(8)(3)
(1) Body codes are determined by fourth character of VIN code. (2) In discharge line near compressor. (3) In the line to accumulator or on accumulator. (4) In discharge line near condenser. (5) In discharge line near fender panel. (6) On muffler in discharge line near the compressor. (7) In discharge line near brake master cylinder. (8) In liquid line near evaporator.
(1)Body codes are determined by fourth character of VIN code.
(2)In discharge line near compressor.
(3)In the line to accumulator or on accumulator.
(4)In discharge line near condenser.
(5)In discharge line near fender panel.
(6)On muffler in discharge line near the compressor.
(7)In discharge line near brake master cylinder.
(8)In liquid line near evaporator.

1992 PASSENGER CAR SERVICE VALVE LOCATIONS

1992 TRUCK/VAN SERVICE VALVES LOCATION

VehicleHighLow
Trucks & Vans (1)
"C" & "K" Series(2)(3)
"G" Series(2)(5)
"L" & "M" Series(4)(5)
"P", "R" & "V" Series(2)(5)
"S" &"T" Series(2)(5)
"U" Series(2)(5)
(1) Series codes are determined by fifth character of VIN code. (2) In discharge line near evaporator. (3) In suction line near accumulator. (4) In discharge line near compressor. (5) Service valve on accumulator.
(1)Series codes are determined by fifth character of VIN code.
(2)In discharge line near evaporator.
(3)In suction line near accumulator.
(4)In discharge line near compressor.
(5)Service valve on accumulator.

1992 TRUCKS & VANS SERVICE VALVE LOCATIONS

ApplicationOrifice Tube LocationOrifice Tube Remover/Installer
Passenger Cars (1)
"A" BodyCondenserJ-26549-C
"B" BodyCondenserJ-26549-E
"C" BodyEvaporatorJ-26549-D
"D" BodyEvaporatorJ-26549-D
"E" BodyEvaporatorJ-26549-D
"F" BodyEvaporatorJ-26549-D
"H" BodyCondenserJ-26549-D
"J" BodyCondenserJ-26549-89
"K" BodyEvaporatorJ-26549-D
"L" BodyEvaporatorJ-26549-D
"N" BodyCondenserJ-26549-89
"W" BodyEvaporatorJ-26549-C
"Y" BodyEvaporatorJ-26549-D
Trucks & Vans (2)
"C" SeriesEvaporatorNot Available
"G" SeriesEvaporatorNot Available
"K" SeriesEvaporatorNot Available
"L" SeriesEvaporatorNot Available
"M" SeriesEvaporatorNot Available
"P" SeriesEvaporatorNot Available
"R" SeriesEvaporatorNot Available
"S" SeriesEvaporatorJ-26549-D
"T" SeriesEvaporatorJ-26549-D
"U" SeriesCondenserJ-26549-C
"V" SeriesEvaporatorNot Available
(1) Body codes are determined by fourth character of VIN code. (2) Series codes are determined by fifth character of VIN code.
(1)Body codes are determined by fourth character of VIN code.
(2)Series codes are determined by fifth character of VIN code.

1992 ORIFICE TUBE LOCATION & REMOVER/INSTALLER APPLICATION

  1. If difficulty is encountered during removal of a plugged or restricted orifice tube, remove as much impacted residue as possible.
  2. Using a heat gun, carefully apply heat on inlet pipe. If inlet pipe contains small dimples in the line, apply heat 1/4" away from the dimples. On all applications, use care not to overheat pipe. NOTE: If system has a pressure switch near orifice tube location, remove pressure switch prior to heating the pipe to avoid switch damage.
  3. While heat is being applied, install proper orifice tube remover/installer in orifice tube. Use a turning motion along with a push or pull motion to loosen orifice tube and remove it.