1993 CHEVROLET DYNASTY service

(4) Remove nuts holding console to floor bracket.
(5) Position front seats full rearward.
(6) Raise console storage bin cover and remove bot-
tom mat. (7) Remove screws holding bottom of storage bin to
floor bracket. (8) Remove screws holding console side panels to
instrument panel. Disengage hook and loop fasteners
and separate side panels from console. (9) Disconnect shift indicator cable and clip from
shift mechanism through right side panel opening, if
equipped with automatic transaxle. Refer to Group
8E, Instrument Panel and Gauges for proper service
procedures. (10) Disengage clips holding parking brake lever
cover to console and separate cover from vehicle. (11) Remove center instrument panel bezel. Refer
to Group 8E, Instrument Panel. Remove screws hold-
ing console to instrument panel. (12) Remove screws holding console to lower in-
strument panel. (13) Remove bolts holding console to forward floor
mounting bracket. (14) Remove gear selector knob.
(15) Separate console from floor and remove from
vehicle.
INSTALLATION
Reverse the preceding operation.
FLOOR CARPET
REMOVAL (FIG. 20)
(1) Remove cowl trim panels and scuff plates.
(2) Remove front seats and inboard seat belts. (3) Remove center arm rest and front console.
(4) Remove outboard seat belt lower attaching
bolts. (5) Remove left dash panel foot rest.
(6) Remove rear seat cushion.
(7) Pull carpet from under quarter trim covers.
(8) Fold carpet and remove through door opening.
INSTALLATION
Reverse the preceding operation.
OVERHEAD CONSOLE
REMOVAL (FIG. 21)
(1) Remove screws holding overhead console to re-
inforcement bracket. (2) Slide overhead console rearward to separate re-
inforcement bracket retainer tab from console. (3) Lower console from roof and disconnect wire
connectors.
INSTALLATION
Reverse The preceding operation.
Fig. 19 Center Console
Fig. 20 Floor Carpet and SilencersÐTypical
Fig. 21 Overhead ConsoleÐTypical
23 - 80 AJ-BODY Ä

AJ/27-VEHICLE CONVERTIBLE BODY COMPONENT SERVICE INDEX
page page
Adjustment Procedures .................... 92
Folding Top Cover ....................... 90
Folding Top Headlining .................... 87
Folding Top Storage Sling Well .............. 87
Hydraulic Cylinder ........................ 95
Hydraulic Cylinder Line Seals ............... 95
Hydraulic Pump Assembly .................. 95
Hydraulic Pump Line Seals ................. 95 Hydraulic System Tests
.................... 95
Hydraulic Systems ........................ 95
Quarter Window ......................... 87
Rear Seat Back .......................... 86
Rear Seat Belt Retractors .................. 86
Rear Seat Cushion ....................... 86
Rear Window and Zipper ................... 88
Rear WindowÐWithout Zipper ............... 88
REAR SEAT CUSHION
REMOVAL (FIG. 1)
(1) Using a large flat blade screw driver, pry up-
ward at the retainer loop at each end of the seat
cushion. (2) Disengage retainer loops from retainer cups in
floor pan. (3) Separate seat cushion from vehicle.
INSTALLATION
Reverse the preceding operation.
REAR SEAT BACK
REMOVAL (FIG. 1)
(1) Remove rear seat cushion.
(2) Remove bolts holding rear seat back to floor
pan kick-up. (3) Push seat back downward and disengage hook
retainers at top of back frame. (4) Separate seat back from vehicle.
INSTALLATION
Reverse the preceding operation.
REAR SEAT BELT RETRACTORS
REMOVAL (FIG. 2)
(1) Remove rear seat cushion and back.
(2) Remove bolt holding shoulder belt turning loop
to seat back reinforcement panel. (3) Remove bolts holding rear seat belt retractor to
floor kick-up. (4) Remove bolts holding retractor to quarter panel
reinforcement. (5) Remove bolts holding lap belt to lower quarter
panel reinforcement. (6) Separate seat belt retractor from vehicle.
INSTALLATION
Reverse the preceding operation.
Fig. 1 Rear Seat Cushion
Fig. 2 Rear Seat Belts
23 - 86 AJ/27-BODY Ä

AP-VEHICLE BODY COMPONENT SERVICE INDEX
page page
A-Pillar and Roof Rail Mouldings ............ 109
B-Pillar Trim PanelÐAP-44 Body ............ 109
Body Side Moulding and Applique ........... 108
Cowl Panel Trim and Scuff Plates ........... 109
Door Opening Weatherstrips ............... 107
Floor Carpet ........................... 113
Front Center Console .................... 113
Front Door and Hinge .................... 100
Front Door Belt Moulding and Weatherstrip .... 102
Front Door Glass ........................ 101
Front Door Glass Channel and Run Weatherstrip .......................... 103
Front Door Glass Run Lower Channels ....... 103
Front Door Latch ........................ 101
Front Door Side View Mirror ............... 101
Front Door Trim PanelÐAP-24/44 Body ....... 99
Front Door Water Shield .................. 100
Front Door Window Regulator/Manual ........ 103
Front Door Window Regulator/Power ......... 104
Front End Splash Shields .................. 99
Front Power Door Lock Actuator ............ 102
Front Seat BeltsÐAP-24 Body .............. 110
Front Seat BeltsÐAP-44 Body .............. 110
Front Seats ............................ 111
Grille .................................. 97
Grille Opening Panel ...................... 97
Head Lining ............................ 114
Hood and Hinges ........................ 97 Hood Latch and Release Cable
.............. 98
Lift Gate Luggage Rack ................... 116
Lift Gate Remote Release Cable ............ 115
Lower Quarter Trim PanelÐAP-44 Body ...... 109
Outside Front Door Latch Release Handle ..... 101
Outside Rear Door Latch Release Handle ..... 105
Overhead Console ....................... 113
Quarter Glass Weatherstrip ................ 108
Quarter Glass Window ................... 108
Quarter Trim PanelÐAP-44 Body ........... 109
Rear Door and Hinge .................... 104
Rear Door Belt Moulding and Weatherstrip .... 106
Rear Door Glass ........................ 106
Rear Door Glass Run Weatherstrip .......... 107
Rear Door Latch ........................ 105
Rear Door Silencer and Water Shield ........ 104
Rear Door Stationary Glass ................ 107
Rear Door Trim Panel .................... 104
Rear Door Window Regulator/Manual ........ 107
Rear Door Window Regulator/Power ......... 107
Rear Power Door Lock Actuator ............ 106
Rear Seat Belts ......................... 111
Rear Seats ............................ 112
Rear Window Glass ...................... 115
Sun Roof Air Deflector ................... 114
Sun Roof Drain Tubes .................... 115
Sun Roof Weatherstrip ................... 114
Upper Quarter Trim PanelÐAP-44 Body ...... 109
GRILLE
REMOVAL (FIG. 1)
(1) Raise hood to the up position.
(2) Remove screws holding grille to grille opening
panel. (3) Separate grille from vehicle.
INSTALLATION
Reverse the preceding operation.
GRILLE OPENING PANEL
REMOVAL (FIG. 1)
(1) Remove grille from grille opening panel.
(2) Remove headlamp assemblies. Refer to Group
8L. Lamps for proper procedures. (3) Remove bolts holding grille opening panel to
closure panel brackets. (4) Remove bolt holding grille opening panel to
brace in front of radiator. (5) Separate grille opening panel from vehicle.
INSTALLATION
Reverse the preceding operation.
HOOD AND HINGES
HOOD REMOVAL (FIG. 2)
(1) Raise hood to full up position.
(2) Disconnect the under hood lamp wire connec-
tor. (3) Mark all bolt and hinge attachment locations
with a grease pencil or other suitable device to pro-
vide reference marks for installation. When install-
Fig. 1 Grille and Grille Opening Panel
Ä AP-BODY 23 - 97

AP/27-VEHICLE CONVERTIBLE BODY COMPONENT SERVICE INDEX
page page
A-Pillar and Windshield Header Weatherstrip . . . 117
Convertible Top Adjustments ............... 131
Convertible Top Header ................... 118
Convertible Top Latch Hooks ............... 131
Door Glass Alignment .................... 131
Door Glass Rear Channel ................. 127
Door Striker Guide ...................... 128
Forward Roof Rail ....................... 121
Fourth Roof Bow and Slat ................. 120
Fourth Roof Bow Slat .................... 132
Front Door Belt Moulding and Weatherstrip .... 127
Front Door Glass ........................ 125
Front Door Stationary Glass and Division Channel ............................. 126
Front Door Stationary Glass Channel Weatherstrip .......................... 126
Front Door Striker Guide Socket ............ 127
Front Seat Belt Retractor .................. 128
General Information ...................... 117
Quarter Glass and Roller Bracket ........... 132
Quarter Panel Belt Moulding ............... 129
Quarter Trim Panel ...................... 128
Rear Roof Rail ......................... 121
Rear Seat Back ......................... 128 Rear Seat Belt Retractor
.................. 129
Rear Tensioner Plate ..................... 132
Rear Window .......................... 122
Roof Linkage ........................... 121
Roof Rail Weatherstrip ................... 118
Roof Rail Weatherstrip Retainer ............. 131
Second Roof Bow and Linkage ............. 119
Sling-Well ............................. 124
Stationary Quarter Glass and Weatherstrip .... 121
Third Roof Bow ......................... 120
Top Cover ............................. 124
Top Frame ............................ 125
Top Header Trim Cover ................... 118
Top Latch ............................. 118
Top Lift Assist Cylinder ................... 122
Top Stack Down-Stop .................... 132
Top Stack Up-Stop ...................... 132
Trunk Hinge Lid ........................ 130
Trunk Lid .............................. 130
Trunk Lid Applique ...................... 130
Trunk Lid Lining ........................ 129
Trunk Opening Weatherstrip ............... 130
Windshield Header Lining ................. 117
Windshield Header Moulding ............... 117
GENERAL INFORMATION
This section will cover components that are unique
to the AP-vehicle convertible. All components that
are common to the AP-vehicle two door hardtop are
covered in the AP-Vehicle Body Components section.
WINDSHIELD HEADER MOULDING
REMOVAL (FIG. 1)
(1) Remove windshield header lining.
(2) Remove nuts holding moulding to windshield
header. (3) Separate windshield header moulding from ve-
hicle.
INSTALLATION
Apply sealing putty around mounting studs on
back of moulding and reverse the removal operation.
WINDSHIELD HEADER LINING
REMOVAL (FIG. 1)
(1) Remove sun visors and inner sun visor hanger
clips. (2) Remove upper A-pillar trim covers.
(3) Remove dome lamp.
(4) Separate header lining from vehicle.
INSTALLATION
Reverse the preceding operation.
A-PILLAR AND WINDSHIELD HEADER
WEATHERSTRIP
REMOVAL (FIG. 2)
(1) Remove upper and lower A-pillar trim covers.
(2) Remove header lining and moulding.
(3) Pull A-pillar door opening weatherstrip from
pinch flange. (4) Pull drip rail weatherstrip from drip rail next
to windshield.
Fig. 1 Windshield Header Moulding
Ä AP/27 CONVERTIBLE 23 - 117

AY-VEHICLE BODY COMPONENT SERVICE INDEX
page page
A-Pillar and Roof Rail Mouldings ............ 143
B-Pillar Trim Panel ...................... 143
Body Mouldings ......................... 146
Cowl Panel Trim and Scuff Plates ........... 143
Door Frame Trim Moulding ................ 137
Front Door and Hinge .................... 137
Front Door Glass ........................ 139
Front Door Latch ........................ 138
Front Door Silencer and Water Shield ........ 137
Front Door Trim Panel .................... 136
Front Door Window Regulator .............. 138
Front End Splash Shields ................. 136
Front Seat Belts ........................ 144
Front Seats ............................ 145
Grille AY/P Body ........................ 133
Grille AY/S Body ........................ 133
Grille Opening Panel AY/P Body ............ 134
Grille Opening Panel AY/S Body ............ 134
Head Lining ............................ 142
Hood and Hinges ....................... 134
Hood Latch and Release Cable ............. 135
Hood Ornament AY/P-S .................. 134
Outside Door Handle ..................... 138
Overhead Console ....................... 142 Quarter Trim Panel
...................... 143
Rear Deck Filler Panel ................... 146
Rear Door and Hinge .................... 140
Rear Door Fixed Glass Outer Cover ÐAY-S Body ......................... 141
Rear Door Fixed Window Module ........... 142
Rear Door Frame Trim Moulding ............ 139
Rear Door Glass ........................ 141
Rear Door Glass Lift Plate and Guide Bar ..... 141
Rear Door Latch ........................ 140
Rear Door Outer CoverÐAY-P Body ......... 141
Rear Door Outside Handle ................ 140
Rear Door Silencer and Water Shield ........ 140
Rear Door Trim Panel .................... 139
Rear Door Window Regulator .............. 141
Rear Seat Belts ......................... 144
Rear Seats ............................ 145
Rear Shelf Trim Panel .................... 144
Rear Window Glass ...................... 147
Side View Mirror Trim Cover ............... 137
Trunk Lid .............................. 147
Trunk Lid Hinge ........................ 147
Trunk Lid Torsion Bar .................... 148
Vinyl Roof Bonnet ....................... 146
GRILLE AY/P BODY
REMOVAL (FIG. 1)
(1) Remove screws holding grille to opening panel.
(2) Push top of grille downward and pull forward.
(3) Separate grille from vehicle.
INSTALLATION
Reverse the preceding operation.
GRILLE AY/S BODY
REMOVAL (FIG. 2)
(1) Loosen hidden screws holding grille to grille
opening panel at corners of grille. The screws are
captured in a clearance hole covered by a bracket be-
hind the grille. (2) Pull grille forward from grille opening panel.
INSTALLATION
Reverse the preceding operation.
Fig. 1 GrilleÐAY/P Body
Fig. 2 GrilleÐAY/S Body
Ä AY-BODY 23 - 133

HOOD ORNAMENT AY/P-S
REMOVAL (FIG. 2)
(1) Remove grille.
(2) Locate hood ornament spring under grille open-
ing panel header. (3) Compress hood ornament spring enough to
clear hooks on end of retaining wire. (4) Squeeze retainer wire hooks together and push
hooks inside spring. (5) Rotate spring counterclockwise to separate
spring from retainer. (6) Separate hood ornament from grille opening
panel.
INSTALLATION
Reverse the preceding operation.
GRILLE OPENING PANEL AY/P BODY
For service procedures for headlamp related compo-
nents refer to Group 8L, Lamps.
REMOVAL (FIG. 3)
(1) Remove front bumper and grille.
(2) Remove front end splash shields as necessary to
gain access to behind fenders. (3) Remove nuts holding GOP mouldings to front
fenders. (4) Remove nuts holding grille opening panel to
front fenders. (6) Disconnect concealed headlamp motor wire con-
nector. (7) Disconnect all lamp wire connectors.
(8) Remove bolts holding grille opening panel to
radiator closure panel and center brace. (9) Separate grille opening panel from vehicle.
INSTALLATION
Reverse the preceding operation.
GRILLE OPENING PANEL AY/S BODY
For service procedures for headlamp related compo-
nents refer to Group 8L, Lamps.
REMOVAL (FIG. 4)
(1) Remove front bumper and grille.
(2) Remove front end splash shields as necessary to
gain access to behind fenders. (3) Remove nuts holding mouldings to front fend-
ers. (4) Remove bolts holding mouldings to bottom of
grille opening panel and separate mouldings from ve-
hicle. (5) Remove nuts holding grille opening panel to
front fenders. (6) Disconnect concealed headlamp motor wire con-
nector. (7) Disconnect headlamp wire connectors.
(8) Remove bolts holding grille opening panel to
radiator closure panel mount brackets and center
brace. (9) Separate grille opening panel from vehicle.
INSTALLATION
Reverse the preceding operation.
HOOD AND HINGES
HOOD REMOVAL (FIG. 5)
(1) Raise hood to full up position.
(2) Lift front edge of cowl cover on the right side of
the windshield washer bottle and disconnect the un-
der hood lamp wire connector. (3) Mark all bolt and hinge attachment locations
with a grease pencil or other suitable device to pro-
vide reference marks for installation. When install-
ing hood, align all marks and secure bolts. The hood
should be aligned to 4 mm (0.160 in.) gap to the front
fenders and flush across the top surfaces along fend-
ers.
Fig. 3 Grille Opening PanelÐAY/P Body
Fig. 4 Grille Opening PanelÐAY/S Body
23 - 134 AY-BODY Ä

HEATING AND AIR CONDITIONING
CONTENTS
page page
AUTOMATIC TEMPERATURE CONTROL (ATC) .............................. 66
COMPONENT SERVICE PROCEDURES ...... 47
FIXED DISPLACEMENT COMPRESSORÐ MODEL 10PA17 ...................... 24
FIXED DISPLACEMENT COMPRESSORÐ MODEL SD709P ...................... 38 FIXED DISPLACEMENT COMPRESSORÐ
MODEL TR105 ....................... 32
GENERAL INFORMATION .................. 1
HEATER AND A/C PERFORMANCE TESTS .... 6
REFRIGERANT SERVICE PROCEDURES ...... 8
VACUUM CONTROL SYSTEM DIAGNOSIS .... 4
VARIABLE DISPLACEMENT COMPRESSORÐ MODEL 6C17 ......................... 13
GENERAL INFORMATION INDEX
page page
A/C System Identification ................... 1
Cooling System Precautions ................. 3
Description and Operation ................... 1
Engine Cooling System Requirements .......... 2 Handling Tubing and Fittings
................. 3
Safety Precautions and Warnings ............. 3
Side Window Demisters .................... 2
System Airflow ........................... 1
A/C SYSTEM IDENTIFICATION
The terms Fixed Displacement Compressor and
Variable Displacement Compressor will be used to
describe the two types of A/C systems used through-
out this Group. Refer to (Figs. 1, 2, 3 and 4). The Variable Displacement Compressor can be
identified by the location of the high pressure line. It
is mounted to the end of the compressor case (Fig. 4).
DESCRIPTION AND OPERATION
Both the heater and the heater/air conditioning
systems share many of the same functioning compo-
nents. This Group will deal with both systems to-
gether when component function is common, and
separately when they are not. For proper operation of the instrument panel con-
trols, refer to the Owner's Manual provided with the
vehicle. All vehicles are equipped with a common A/C-heat-
er unit housing assembly. On heater only systems,
the evaporator and recirculating air door are omitted
(Fig. 5).
SYSTEM AIRFLOW
The system pulls outside (ambient) air through the
cowl opening at the base of the windshield. Then it
goes into the plenum chamber above the A/C-heater unit housing. On air conditioned vehicles, the air
passes through the evaporator. Air flow can be di-
rected either through or around the heater core. This
Fig. 1 Fixed Displacement CompressorÐModel 10PA17
Ä HEATING AND AIR CONDITIONING 24 - 1

SAFETY PRECAUTIONS AND WARNINGS
WARNING: WEAR EYE PROTECTION WHEN SER-
VICING THE AIR CONDITIONING REFRIGERANT
SYSTEM. SERIOUS EYE INJURY CAN RESULT
FROM EYE CONTACT WITH REFRIGERANT. IF EYE
CONTACT IS MADE, SEEK MEDICAL ATTENTION
IMMEDIATELY. DO NOT EXPOSE REFRIGERANT TO OPEN
FLAME. POISONOUS GAS IS CREATED WHEN RE-
FRIGERANT IS BURNED. AN ELECTRONIC TYPE
LEAK DETECTOR IS RECOMMENDED. LARGE AMOUNTS OF REFRIGERANT RELEASED
IN A CLOSED WORK AREA WILL DISPLACE THE
OXYGEN AND CAUSE SUFFOCATION. THE EVAPORATION RATE OF (R-12) REFRIGER-
ANT AT AVERAGE TEMPERATURE AND ALTITUDE
IS EXTREMELY HIGH. AS A RESULT, ANYTHING
THAT COMES IN CONTACT WITH THE REFRIGER-
ANT WILL FREEZE. ALWAYS PROTECT SKIN OR
DELICATE OBJECTS FROM DIRECT CONTACT
WITH REFRIGERANT.
CAUTION: Liquid refrigerant is corrosive to metal
surfaces. Follow the operating instructions supplied
with equipment being used.
COOLING SYSTEM PRECAUTIONS
WARNING: ANTIFREEZE IS AN ETHYLENE GLYCOL
BASE COOLANT AND IS HARMFUL IF SWAL-
LOWED OR INHALED. IF SWALLOWED, DRINK
TWO GLASSES OF WATER AND INDUCE VOMIT-
ING. IF INHALED, MOVE TO FRESH AIR AREA.
SEEK MEDICAL ATTENTION IMMEDIATELY. DO NOT STORE IN OPEN OR UNMARKED CON-
TAINERS. WASH SKIN AND CLOTHING THOROUGHLY AF-
TER COMING IN CONTACT WITH ETHYLENE GLY-
COL. KEEP OUT OF REACH OF CHILDREN AND PETS.
DO NOT OPEN A COOLING SYSTEM WHEN THE
ENGINE IS AT RUNNING TEMPERATURE. PER-
SONAL INJURY CAN RESULT.
The engine cooling system is designed to develop
internal pressure of 97 to 123 kPa (14 to 18 psi). Al-
low the vehicle 15 minutes (or until a safe tempera-
ture and pressure are attained) before opening the
cooling system. Refer to Group 7, Cooling System.
HANDLING TUBING AND FITTINGS
Kinks in the refrigerant tubing or sharp bends in
the refrigerant hose lines will greatly reduce the ca-
pacity of the entire system. High pressures are pro-
duced in the system when it is operating. Extreme
care must be exercised to make sure that all connec-
tions are pressure tight. Dirt and moisture can enter
the system when it is opened for repair or replace-
ment of lines or components. The refrigerant oil will
absorb moisture readily out of the air. This moisture
will convert into acids within a closed system. The following precautions must be observed:
The system must be completely empty before open-
ing any fitting or connection in the refrigeration sys-
tem. Open fittings with caution even after the
system has been emptied. If any pressure is noticed
as a fitting is loosened, allow trapped pressure to
bleed off very slowly. A good rule for the flexible hose lines is to keep the
radius of all bends at least 10 times the diameter of
the hose. Sharper bends will reduce the flow of re-
frigerant. The flexible hose lines should be routed so
they are at least 3 inches (80 mm) from the exhaust
manifold. Inspect all flexible hose lines to make sure
they are in good condition and properly routed. Unified plumbing connections with aluminum gas-
kets cannot be serviced with O-rings. These gaskets
are not reusable and do not require lubrication be-
fore installing. The use of correct wrenches when making connec-
tions is very important. Improper wrenches or im-
proper use of wrenches can damage the fittings. The A/C system will remain chemical stabile as
long as pure-moisture-free R-12 and refrigerant oil is
used. Abnormal amounts of dirt, moisture or air can
upset the chemical stability. This condition could
cause operational troubles or even serious damage if
present in more than very small quantities. When it is necessary to open the refrigeration sys-
tem, have everything needed to service the system
ready. The system should not be left open any longer
than necessary. Cap or plug all lines and fittings as
soon as they are opened to prevent the entrance or
dirt and moisture. All lines and components in parts
stock should be capped or sealed until they are ready
to be used. All tools, including the refrigerant dispensing man-
ifold, the manifold gauge set, and test hoses should
be kept clean and dry.
Fig. 6 Heater only or HeaterÐA/C Controls
Ä HEATING AND AIR CONDITIONING 24 - 3