Ambulance

The default casualty-carrying vehicle, the Ambulance hasn't evolved much during the GTA series. It has appeared in every GTA game, except GTA2 where a paramedic car is featured instead, it is called the Medicar. You can be sure to always find an ambulance at the nearest hospital. If multiple people are killed an ambulance will arrive and two paramedics will get out and attempt to revive the wounded. Typically if paramedics are killed it creates more police attention than other civilians.

Paramedic Missions
Paramedic missions can be toggled on or off when in the ambulance in all GTA III-era games. These require the player to find, pick up and deliver patients to the hospital within a time limit. With every level comes another patient to deliver, increasing the difficulty. Usually when the player beats level 12 the mission is complete (but can be carried on and replayed later) and a reward is achieved, e.g. infinite sprint or extra health.

If the ambulance is left during the mission the player has failed and must restart from level one, similarly if they kill the patient or run out of time. Three patients can be carried in an ambulance at any one time.

Locations
The death of pedestrians, whether by the protagonist or non-playable characters will often bring an Ambulance to the area.

Liberty City

 * Sweeney General Hospital, Portland View, Portland Island, Liberty City
 * Carson General Hospital, Rockford, Staunton Island, Liberty City
 * Hope Medical College, Pike Creek, Shoreside Vale, Liberty City

Vice City

 * Ocean View Hospital, Ocean Beach, Vice City
 * Shady Palms Hospital, Vice Point, Vice City
 * West Haven Community Healthcare Center, Little Havana, Vice City
 * Schuman Healthcare Center, Downtown, Vice City

Los Santos

 * County General Hospital, Jefferson, Los Santos
 * All Saints General Hospital, Market, Los Santos

San Fierro

 * San Fierro Medical Center, Santa Flora, San Fierro

Las Venturas

 * Las Venturas Hospital, Las Venturas Airport, Las Venturas

Red County

 * Montgomery Medical Center, Montgomery

Whetstone

 * Angel Pine Medical Center, Angel Pine

Tierra Robada and Bone County

 * El Quebrados Medical Center, El Quebrados
 * Fort Carson General Hospital, Fort Carson