Standard Vehicles
(Listed in the order in which they appear in the vehicle showroom)
Two Door
Buick Business Coupe (Westlake) - parking lot east of the bloody door in Upon Reflection
Buick Coupe (Downtown, Central) - parking lot next to Eagleson's Gun Store in Buyer Beware
Buick Eight Convertible (Wilshire) - to the right of the Central Gun Shop in Upon Reflection
Buick Eight Coupe (Downtown, Central) - in the same parking lot as the "Nightmare Alley" film reel
Buick 2-Dr Sedanette (Wilshire) - by an apartment just to the southeast of the Sawyer House Fire in The Gas Man
Chevrolet Fleetmaster 2-Dr (Downtown, Central) - parking lot across the street from Cavanagh's Bar in The Driver's Seat
Chevrolet Styleline (Downtown, Central) - across the street from Central Police Station in A Marriage Made in Heaven
Chrysler Town and Country (Downtown, Hollywood) - parking lot of Kelso's apartment in A Polite Invitation
Cord Hardtop (Hollywood) - easily found driving around
Buick Custom (Hollywood) - in the parking lot as you're leaving the boxing stadium during The Set Up
Ford Convertible (Hollywood) - behind the Numbers Operation building in The Black Caesar
Ford Custom (Central) - pulls up in front of you as Richard Bates gets in the truck to leave Baron's Bar during The White Shoe Slaying
Packard Custom (Wilshire) - InstaHeat Factory lot during The Gas Man
Desoto 2-Dr Custom (Westlake) - beside The Bamba Club during The Red Lipstick Murder
Ford 2-Dr (Westlake) - behind The Bamba Club during The Red Lipstick Murder
Ford Business Coupe (Westlake) - parking lot across from Central Police Station during The Red Lipstick Murder
Ford Tudor Convertible (Wilshire) - Hall of Records lot during A Polite Invitation
Ford V8 Sedan (Downtown, Central) - used as a chase vehicle in The Badger Game
LaSalle V8 Sedan (Westlake) - parking lot on the north side of the road, at the east end of the tunnel by Union Station
Lincoln Continental Coupe (Wilshire) - outside the bookmaker's office in The Set Up
Nash Super 600 (Downtown, Central) - easily found driving around
Packard Clipper Eight (Downtown, Central) - driven and crashed in front of Haskell's Men's Wear by the suspects in Manifest Destiny
Packard Clipper Six (Wilshire) - beside Eagleson's Gun Store during Buyer Beware
Pontiac Torpedo Six (Westlake, Hollywood) - behind the Maldonado Residence in The Silk Stocking Murder
Studebaker Commander (Westlake) - near the mini golf course where you find the film reel "In a Lonely Place"
Four Door
Cadillac LaSalle Series 50 (Westlake, Downtown) - across from Central Police Station during The Driver's Seat
Cadillac Series 61 Touring Sedan (Wilshire) - behind the building you use to sneak up on the sniper in Manifest Destiny
Cadillac Series 61 (Westlake) - same parking lot as the "Nightmare Alley" film reel
Cadillac Series 75 Limousine (Hollywood) - across from the Black Caesar Food Hut during The Black Caesar
Chevrolet Sedan (Downtown) - Belmont High School parking lot during The Golden Butterfly
Plymouth P5 (Downtown) - parking lot at the beginning of A Different Kind of War
Chrysler Airflow (Downtown, Central) - in front of the Moller Residence as you walk over to talk to the neighbor in The Golden Butterfly
Desoto Custom Suburban (Downtown, Central) - across from Central Police Station during The Red Lipstick Murder
Hudson Super Six (Downtown, Central) - Scott's Garage lot (4th and Los Angeles St.)
International D Series Sedan (Downtown) - lot to the east of the bloody door in Upon Reflection
Frazer Manhattan (Downtown, Central) - lot at 4th and Hill St.
Lincoln Zephyr Touring (Westlake) - same lot at 4th and Hill
Oldsmobile Hydramatic 88 (Downtown, Central) - beside Just Picked Fruit Market during The Silk Stocking Murder
Oldsmobile Sedan (Hollywood) - parked at the curb at the Steffens house fire in The Gas Man
Packard Clipper Eight (Downtown, Central) - Dewey Brothers Dealership
Plymouth Sedan (Downtown) - behind Maldonado Residence during The Silk Stocking Murder
Plymouth Special Deluxe Six (Wilshire) - east of the bloody door in Upon Reflection (busy lot, that one)
Pontiac Sedan Six (Downtown, Central) - you'll see this one on the streets all over downtown - very easy to find
Willys Overland (Downtown, Central) - also very common to find driving around downtown
Sports
Cadillac V16 Convertible (Hollywood) - across from Central Police Station during The Driver's Seat
Chevrolet Fleetmaster Convertible (Hollywood) - very common driving around Hollywood
Mercury Custom (Downtown) - behind Maldonado Residence during The Silk Stocking Murder
Ford Deluxe Convertible (Westlake) - beside Ray's Cafe in A Marriage Made in Heaven
Lincoln Continental Convertible (Hollywood) - in a lot north of the worksite where you find the "Sweet Smell of Success" film reel
Lincoln Model K Convertible Roadster (Wilshire) - behind The Bamba Club during The Red Lipstick Murder
Nash La Fayette Convertible (Hollywood) - across from the Black Caesar Food Hut in The Black Caesar
Oldsmobile S98 Convertible (Wilshire) - very common driving around Wilshire
Service
International KB8 (Downtown) - lot at Hawthorn and La Brea in Hollywood
Chevrolet Pickup (Westlake) - next to Schroeder's apartment during Upon Reflection
Chevrolet Van (Westlake) - that lot to the east of the bloody door again (during Upon Reflection)
Chevrolet Civilian Van (Downtown, Central) beside Eagleson's Gun Store in Buyer Beware
Chevrolet Pickup 2 (Downtown, Central) - fenced lot across from Cavanagh's Bar in The Driver's Seat
GMC Pickup (Downtown, Central) - across from Central Police Station during The Driver's Seat
Nash Deluxe 600 Army (Hollywood) - Hughes Airplane Co. on Van Ness Avenue
American La France Fire Truck (Wilshire) - at the fire station next to the Vice Precinct at the start of Manifest Destiny
Buick Ambulance (Central) - in the parking lot of the Good Samaritan Hospital on 6th Ave.
Chevrolet Tow Truck (Wilshire) - around the Demolished Elysian Fields house during House of Sticks
Desoto Custom Suburban Taxi (Downtown, Central) - extremely common driving around downtown
Dodge Fuel Truck (Wilshire) - intersection of 3rd, 4th and Alameda
Ford Ambulance (Central) - frequently parked at the coroner's office, which you first visit during A Marriage Made in Heaven
International Metro KB1M (Wilshire) - on the streets near the garage containing the Chrysler Woody (see hidden vehicles below)
International KB5 (Hollywood) - behind the building used to sneak up on the sniper during Manifest Destiny
International D Series (Central) - lot east of the bloody door in Upon Reflection
Heil Colecto-Pak (Central) - in the alley you chase Leroy Sabo through in A Marriage Made in Heaven
International KB8 (Downtown) - commonly found driving around the east side of downtown
International KB6 (Downtown) - behind a fence across from Schroeder's Apartment in Upon Reflection
Police
Buick Super - Regular car for traffic desk
Cadillac Series 62 Convertible - Regular car for vice desk
Chevrolet Fleetmaster 2-Dr - Jack Kelso's car during arson cases.
Chevrolet Coroner's Van - Near Crime Scenes or the Coroner's office
Ford Police Special - Your first car, used during patrol cases
Hudson Commodore - Regular car during arson cases
International Police Wagon - blocking the road off during the street crime case Bank Job
Nash Super 600 - regular car during homicide cases
Studebaker Commander - parked at several crime scenes
Hidden Bonus Vehicles
Note that this list is not in the order these cars appear in the game, but it is in the best order to go back and get them after you have unlocked them all (any time after you have reached level 15). It also follows the map below, so the directions assume you have already made your way to the marker on the map