Guess you first have to define the C5 years you would be interested in
Being you want a rag top, that reduces the FRC (Billybob) and the Z06s as they are hardtop, no targa tops
Then have to decide if wanting the 4 speed auto tranny or the 6 speed manual tranny
1997-98 had the least amount of HP & Tq and had parts other years did not, so might be harder finding those repair parts
2002-04, non Z06 still had the better LS6 engine producing more HP & Tq
White or silver sticker which is located inside the glove box compartment on the 
glove box door (late 1998 & newer)
View attachment 22417
RPO codes for the C5 features and options
C5 RPO codes
AAB       Memory, Driver Convenience Package
AK5     Inflatable Restraint System, Driver and Passenger
AQ9     Reclining Bucket Seat, Driver and Passenger
AR9     Reclining Bucket Seat, Driver and Passenger, European Style
AX4     Conversion, Seat Belt, Manual, European
BAG     Parts Package, Export
BCC     Cylinder Unit Passenger Door
BGR     Plant Code Bowling Green, KY, USA
BW3     Bumper Provisions Canadian Requirements
B4H     Modification Noise Control, Export
B84     Molding B/S Exterior
CC3     Roof Panel, Removable
CF7     Roof Panel, Removable
CJ2     HVAC System, Air Conditioning, Automatic Temperature Control
C05     Roof, Convertible Folding
C2L     Roof Package, Dual Removable
DD0     Mirror, Outside, LH & RH, Remote Control, Electric, Heated, Light Sensitive
DD8     Mirror, Inside, R/V Light Sensitive
DL5     Decal Roadside Service Information
DL8     Mirrors, Outside, LH/RH Remote Control Electric, Heated
D24     Mirror O/S LH and RH, Remote Control, Electric, Heated LT Sensitive, Power Folding
ECM     Module Inflatable Restraint, European Complaint
FE1     Suspension System
FE3     Suspension System, Sport
FE4     Suspension System, Special Ride and Handling
F45       Chassis, Continuously Variable, Real Time Damping
F55     Chassis Continuously Variable Real Time Damping Magneto Rheological
C5 RPO codes
GU2     Axle, Rear, 2.73 Ratio
GU6     Axle, Rear, 3.42 Ratio
G90     Axle, Rear, 3.15 Ratio
G92     Axle, Rear, Performance Ratio
JL9     Brake System, Power, Front & Rear Disc, Antilock, 4‑Wheel
KG4     Generator 150 AMP
K05     Heater, Engine Block
K63     Generator, 110 Amp
LMS     Ornamentation Emblem Lemans 3RD GTS WIN
LS1     Engine, Gas, 8‑Cylinder, 5.7L, SFI, Aluminum
LS6     Engine, Gas, 8‑Cylinder, 5.7L, SFI, Aluminum HO
MM6     Transmission, Manual 6‑Speed, 85 mm, 2.66 1st, 0.50 6th, O/D
MN6     Merchandised Transmission, Manual 6‑Speed Provisions
MX0     Merchandised Transmission, Automatic O/D Provisions
M12     Transmission, Manual 6‑Speed, 85 mm, 2.97 1st, 0.57 6th, O/D
M30     Transmission, Automatic 4‑Speed, 4L60‑E, Electronic
NA3     Emission System, Japan
NC1     Emission System, California LEV
NF9     Emission System Federal, NLEV
NK4     Steering Wheel, Sport Leather
NP7     Steering Column, EEC Approved
NT3     Emission System EEC 00
N37     Steering Column, Tilt, Telescoping
N73     Wheel Custom Sport, VAR 4
N73       Wheel, Custom Sport Magnesium
P12     Wheel 17 x 9.5 Front and 18 x 10.5 Rear, Cast Aluminum
P36     Wheel 17 X 9.5 FRT and 18 x 10.5 RR, Alum Polished
QD4       Wheel 17 x 8.5 Front and 18 x 9.5 Rear, Aluminum, Styled
QF5     Wheel, 17.0 x 8.5" Front and 18.0 x 9.5" Rear, Aluminum, Polished
QG1     Wheel, 17.0 x 8.5" Front and 18.0 x 9.5" Rear, Aluminum, Painted
More C5 RPO codes
RPA     Rear Parking Assist
T2F     Brake Provisions Special
T82     Headlamp Control, Automatic On‑Off
T84     Headlamps, RH Rule of Road, E Mark
T85     Headlamps, LH Rule of Road, E Mark
T89     Lamps, Tail & Stop, Export
T90     Lamps, Signaling & Marker, Front, Export
T93     Lamps, Tail & Stop, Special
UD4     Alarm, Vehicle Speed, 120 km/h
UH3     Indicator Low Tire Press, Var 2
UK1     Radio Frequencies, Japanese
UL0     Radio, AM/FM Stereo, Seek/Scan, Auto Reverse Music Search
 Cassette, Auto Tone, Clock, Electronically Tuned Receiver (ETR)
UL2     Radio Frequencies, European
UN0     Radio, AM/FM Stereo, Seek/Scan, Compact Disc, Auto Tone,
 Clock, Electronically Tuned Receiver (ETR)
UV6     Display, Head Up
UV7     Antenna, Windshield, Rear Window, Radio
UZ6     Speaker System 6, Quad Front Door Mounted, Dual Quarter Mounted
U1S     Player, Multiple Compact Disc
U19     Instrument Cluster, Speedometer, Metric (Canadian, Export)C5 RPO codes
U52     Instrument Cluster, Electronic
U73     Antenna, Fixed, Radio
U75     Antenna Power, Radio
VD1     Provision Options, Europe
VE1     Provision Options, Japan
VG1     Protector Underhood Compound, Corrosion Preventive, Water Based, Clear
VG8     Vehicle Label, Notice to Buyer
VG9     Protector, Wax, Exterior Body
VH5     Plate, Vehicle Identification
VL4     License Plate Mounting Package, Front, EEC
V49     License Plate Frame
V73     Vehicle Statement, US/Canada
V76     Tow Hooks
V87     Vehicle Statement, Gulf States Organization
C5 RPO codes
XAB     Tire Front 245/40ZR17‑95Y BW
XFW     Tire, Front, P265/40R17 BW R/PE ST TL HW4
XGG     Tire, Front, P245/45R17‑89Y, BW TL SBR HW4, EMT
XMC     Tire, Front, P245/45R17‑89Y,BW R/PE ST TL HW4
YAC     Tire Rear P245/40ZR18‑94Y BW ST TL HW4
YFU     Tire, Rear, P295/35R18‑91Y, BW R/PE ST TL HW4
YGH     Tire, Rear, P275/40R18‑94Y,BW TL HW4 SBR, EMT
YME     Tire, Rear, P275/40R18‑94Y, BW TL HW4 SBR
C5 RPO codes
Z16     Performance Package Z06 Commemorative Edition
Z18     Performance Package European Commemorative Edition
Z49     Modifications, Canadian, Mandatory Base Equipment
Z5X     Mirror Provisions, Arabic Language
Z51     Performance Package, Handling