BODY CODE DESIGNATIONS (PASSENGER CARS)
| Body Designation (1) | Model |
|---|---|
| "A" Body | Century, Cutlass Ciera & Cutlass Cruiser |
| "B" Body | Caprice, Custom Cruiser & Roadmaster |
| "C" Body | DeVille, Fleetwood, Ninety-Eight & Park Avenue |
| "D" Body | Brougham |
| "E" Body | Eldorado, Riviera, Toronado & Trofeo |
| "F" Body | Camaro & Firebird |
| "H" Body | Bonneville, Eighty-Eight & LeSabre |
| "J" Body | Cavalier & Sunbird |
| "K" Body | Seville |
| "L" Body | Beretta & Corsica |
| "N" Body | Achieva, Grand Am & Skylark |
| "W" Body | Cutlass Supreme, Grand Prix, Lumina & Regal |
| "Y" Body | Corvette |
| (1) Body codes are determined by fourth character of VIN code. | |
| (1) | Body codes are determined by fourth character of VIN code. |
BODY CODE DESIGNATIONS (PASSENGER CARS)
BODY CODE DESIGNATIONS TRUCKS & VANS
| Model | (1) Designation | |
|---|---|---|
| Astro & Safari | ||
| 2WD | "M" Series | |
| 4WD | "L" Series | |
| Blazer, Pickups, Sierra, Suburban & Yukon | ||
| 2WD Models | "C" Series | |
| 4WD Models | "K" Series | |
| Lumina APV, Silhouette & Transport | "U" Series | |
| Pickups (S/T) | ||
| 2WD | "S" Series | |
| 4WD | "T" Series | |
| Van | "G" Series | |
| (1) Series codes are determined by fifth character of VIN code. | ||
| (1) | Series codes are determined by fifth character of VIN code. |
BODY CODE DESIGNATIONS (GENERAL MOTORS TRUCKS & VANS)
REFRIGERANT OIL
Only new, pure, moisture-free refrigerant oil should be used in A/C systems. This oil is highly refined with a very low moisture content. Oil container must be tightly closed at all times when not in use, or moisture from the air will be absorbed into the refrigerant oil.
On systems with HFC-134a refrigerant, use Polyalkylene Glycol (PAG) wax-free refrigerant oil.
DISCHARGING SYSTEM
| CAUTION | When discharging air conditioning system, use only approved refrigerant recovery/recycling equipment. Make every attempt to avoid discharging refrigerant into the atmosphere. |
If compressor has stem-type service valves, it can be isolated and removed without discharging entire system. Otherwise, discharge system completely using approved refrigerant recovery/recycling equipment before loosening any fittings.
DISCONNECTING LINES & FITTINGS
After system is discharged, carefully clean area around all fittings to be opened. Always use 2 wrenches when tightening or loosening fittings. Some refrigerant lines are connected with a coupling. Special tools may be required to disconnect lines. Cap or plug all openings as soon as lines are removed. DO NOT remove caps until connections of lines and fittings are completed.
Note. All HFC-134a based systems use 1/2-16 ACME threaded fittings.
CONNECTING LINES & FITTINGS
Note. Different fittings and connections are used on systems using HFC-134a refrigerant. Ensure all replacement parts match the connections of the system being worked on.
Always use a new gasket or "O" ring when connecting lines or fittings. Coat "O" ring with refrigerant oil and ensure it is not twisted during installation. Always use 2 wrenches to prevent damage to lines and fittings.
HARRISON A-6 6-CYLINDER
- Operate system for several minutes to stabilize system before performing repairs. Turn off engine. Discharge system using approved refrigerant recovery/recycling equipment, and remove compressor. Remove drain plug. Drain and measure oil.
- If no oil leak exists, add amount of oil drained plus one ounce. If air conditioning components are replaced, refrigerant oil will need to be added to the system.
- Add following amounts if components are changed: 2 ounces for accumulator, 3 ounces for evaporator and one ounce for condenser. Install drain plug and compressor. Evacuate and recharge system. Perform leak test.
HARRISON HR-6/HR-6-HE 6-CYL, HR100T/HR110T 4-CYL & V5 5-CYL
- Operate system for several minutes to stabilize system before performing repairs. Turn off engine. Discharge system using approved refrigerant recovery/recycling equipment, and remove compressor. Drain and measure oil.
- If no oil leak exists and more than one ounce is drained, add drained amount using new oil. If less than one ounce is drained, add 2 ounces of new oil.
- If air conditioning components are replaced, additional refrigerant oil will need to be added to the system. Add following amounts if components are changed: 3.5 ounces for accumulator, 3 ounces for evaporator and one ounce for condenser. Install drain plug and compressor. Evacuate and recharge system. Perform leak test.
General Motors
- Slowly discharge system using approved refrigerant recovery/recycling equipment. Remove A/C compressor, and drain compressor oil. Measure amount drained, and discard oil.
- If no leaks exists, add same amount of oil drained plus one additional ounce. If excessive leak exists, remove accumulator, and drain oil. Measure amount drained, and discard oil.
- If amount drained is less than 3 ounces, add 3 ounces. If amount drained is more than 3 ounces, add drained amount. If system components are changed, add specified amount. See 10PA17 COMPONENT REFRIGERANT OIL CAPACITIES (GENERAL MOTORS) table.
| Component | Ounces |
|---|---|
| Compressor | (1) |
| Condenser | 1.0 |
| Evaporator | 3.0 |
| Accumulator | 3.5 |
| (1) Drain oil from compressor, and then add drained amount plus one ounce. | |
| (1) | Drain oil from compressor, and then add drained amount plus one ounce. |
10PA17 COMPONENT REFRIGERANT OIL CAPACITIES (GENERAL MOTORS)
NIPPONDENSO 10PA20 10-CYLINDER
General Motors
1) Slowly discharge system using approved refrigerant recovery/recycling equipment. Remove A/C compressor, and drain compressor oil. Measure amount drained, and discard oil.
2) If no leaks exists, add drained amount plus one ounce. If excessive leak exists, remove accumulator, and drain oil. Measure amount drained, and discard oil.
3) If amount drained is less than 3 ounces, add 3 ounces. If amount drained is more than 3 ounces, add drained amount. If system components are changed, add specified amount. See 10PA20 COMPONENT REFRIGERANT OIL CAPACITIES (GENERAL MOTORS) table.
| Component | Ounces |
|---|---|
| Compressor | (1) |
| Condenser | 1.0 |
| Evaporator | 3.0 |
| Accumulator | 3.5 |
| (1) Drain oil from compressor, and then add drained amount plus one ounce. | |
| (1) | Drain oil from compressor, and then add drained amount plus one ounce. |
10PA20 COMPONENT REFRIGERANT OIL CAPACITIES (GENERAL MOTORS)