More Various Features

 Infinite grenade launchers
Go to the location shown on the map in the video below. Enter the cave, and dive to the bottom to get a grenade launcher. Then, swim back to the surface, save the game, and reload the saved game. The grenade launcher will have respawned. Repeat this process as many times as desired.

Infinite Molotov cocktails
Go under the bridge at the following location in North Chumash to find a cache of five Molotov cocktails. To get unlimited Molotov cocktails, collect the Molotov cocktails, save the game, and reload the saved game. The Molotov cocktails will have respawned. Repeat this process as many times as desired.

Duplicating vehicles
Customize any car as desired, then switch to a different character, drive by the character in the customized car, and hang out with him. Then, get out of your vehicle, and drive their customized car. When you return with the customized car after hanging out with the other character, there will be another of the same customized car. Get out of the car, and take the duplicated customized car. Then, switch back to the other character, and take the original customized car.
Place the vehicle you want to duplicate inside that character's garage, leave the garage, and save the game. Then, switch to the character you want to receive the duplicated car, and travel to the garage of the previous character where you saved the car. Switch back to the original character who owns the garage, and take the car out of it. Get out of the car, and have both characters meet each other, then immediately switch to the other character, get in the vehicle, and save it in that character's garage. The original character now must pay a small $250 fine to the impound lot to get the vehicle back, but it will be duplicated. Both characters will now own the same vehicle. Repeat this as many times as desired. It is recommended you use this exploit with the Truffade Adder (Bugatti Veyron) super car, as it is worth $1 million. -From: Austin Lin

Easy full health
When you are low on health and not playing a mission, switch to a different character, and then immediately switch back to have your health fully restored.

Easy money
While driving around, look for blue dots to appear on the map, which indicate armored cars. Try to shoot the driver with the briefcase before he reaches the armored car to quickly get the money ($5,000). If you are having problems opening an armored car, drive it into the water, and the back doors will instantly open.
While playing as Franklin and free roaming around his house, a blue marker may appear on the screen. If it does, investigate what is going because it might be a kid telling you his bike got stolen. If you get the bike back for him, later in the game he will text you saying he is a millionaire, and give you $100,000.
Successfully complete the final heist in Story mode to earn approximately $25 million for each character. Then, invest that money in the stock market to make a lot more money.

Easy money in stock market
To make easy money in the stock market, invest in a company, and then target the competing company. When you do something in Grand Theft Auto 5 that affects a company (like robbing a bank or gas station, or destroying a plane), its stock price will decrease by a certain amount depending on the quantity of damage you caused to the company (the more problems you cause the company, the lower the stock price will go). Thus, buy stock in the competing company that you are going to target. For example, buy stock in AirEmu, then shoot down some FlyUS planes to make their stock price decrease and AirEmu's stock price increase. Another method is shooting down some planes of an airline, then buying a bunch of stock in that airline after their stock decreases. Next, shoot down some planes of the competing airline, and the stock price for the airline you bought should increase. The same can be done with oil derricks belonging to RON Oil or LTD Oil.
Buy some stock in AugeryInsurance (AUG), then damage and destroy a bunch of cars, and the stock price should increase.
When a mission objective includes destroying a corporation's asset or reputation, make sure you buy stock in their competitor before completing the objective.
Listen to talk radio stations to hear about stock tips. When you hear about a stock tip, immediately invest in that company to make a profit.
While playing as as Franklin, you can do assassination missions for Lester. Before completing one of the assassination missions below, switch to each character, and invest all your money in the listed company. That company will benefit from the assassination you are about to perform, and your stock in that company will greatly increase in value. Note: Do not sell your stocks right after the assassinations. Wait for three days after each assassination, and then sell them. You should make well over 75% profit off the stock. To make a lot of money, wait until you have accumulated a large amount of money at the end of the game before completing the assassination missions so you can earn a lot more in profits off the stocks.
Assassination 1 (The Hotel): BetaPharmaceuticals (BAWSAQ stock)
Assassination 2 (The Multi Target): Debonaire Cigarettes (LCN stock); sell Debonaire after the mission, then purchase Redwood (LCN)
Assassination 3 (The Vice): Fruit (BAWSAQ stock)
Assassination 4 (The Bus): Vapid (BAWSAQ stock)
Assassination 5 (The Construction): GoldCoast (LCN stock)
All weapon upgrades free
While a mission is active, go to the gun shop, and buy all of the upgrades for every available weapon and some grenade. Once you have obtained all of the upgrades, leave the gun shop, and use one of the grenades to kill yourself. This will cause the mission to fail, and you will start the mission over. When the mission restarts, you will have all of your money back from the purchases in the gun shop. Go back to the gun store, and all the weapon upgrades will still have a checkmark. Repeat this process when new weapons become available. Note: This glitch only works on the unpatched version of Grand Theft Auto 5. You can delete all patches for GTA 5 by using the "Clear hard drive cache" code for the Xbox 360.

Free vehicle repair
While in a damaged vehicle, switch to a different character, and then immediately switch back to have that vehicle completely repaired.
To repair any damaged vehicle for free, simply save the game, then reload the saved game, and the vehicle will be completely repaired.
Drive to your purchased garage, and store the damaged vehicle. Then, exit the garage with another vehicle, re-enter it, and take your previously damaged vehicle. It will now be completely fixed.
While playing as Franklin, you will eventually have the option to purchase a Los Santos Customs shop. Once you purchase it, all repairs and upgrades to vehicles will be free.

Buying properties for free
To purchase any property for free, use one of the following tricks depending on whether it will provide income or not. Note: Using this glitch may permanently prevent you from doing certain side missions that are only activated when you purchase property the normal way. You also must have enough money to purchase the desired property to use this exploit/glitch. Additionally, this glitch only works on the unpatched version of Grand Theft Auto 5. You can delete all patches for GTA 5 by using the "Clear hard drive cache" code for the Xbox 360.
For properties that do not provide an income, position your vehicle in front of the sign that enables you to purchase it. Get out of the vehicle, buy the property, and then immediately get back into your car.
For properties that do provide an income, go up to the sign that allows you to purchase the property. Press Right on the D-pad to go to the confirm purchase prompt. Press Right on the D-pad again to confirm the purchase, then immediately pause the game. Replay any mission from the replay mission menu (ideally a short mission), and complete the mission. You will then spawn back at the property. You should now own the purchased property, and still have the money you originally spent purchasing the property.
Easy max shooting and strength skills
To easily level up the strength and shooting skill stats to 100 in approximately ten minutes, use the following trick. First, buy a lot of pistol ammunition, and then find a bus. Jump on top of the bus, and stomp on it while it is moving. Make sure to move back and forth or you will fall off after stomping. Once your strength is at 100, shoot the middle of the bus until your shooting skill is at 100. The bus should be able to take all the bullets without being destroyed.

Easy max stealth skill
For every minute you spend walking in Stealth mode, you will earn one point towards the stealth skill. Thus, put a rubberband around both Analog-sticks on your controller to automatically walk around while in Stealth mode. Then, leave the game for approximately 100 minutes, and your stealth skill stat should be maxed out.

Easy races
During the countdown sequence in a race, hold LB while unarmed to start driving. Use this glitch to get a head start and finish in first place more easily.

Easy exotic/super car
Go to the following location in Rockford Hills to find an exotic/super car. An exotic/super car will always spawn in this location. The Truffade Adder (Bugatti Veyron) super car is the most frequent to spawn at this location. It is also the fastest car in GTA V.

Easy Cheetah, Infernus, and Voltic car spawn location
Go to the following location. The Coil Voltic, Grotti Infernus, Pegassi Cheetah, and other exotic/super cars often spawn at that location.

Getting the Canins Mesa
The Canins Mesa is a rare and unique off-road vehicle that cannot be purchased in GTA V. You are not actually supposed to be able to acquire the vehicle. Use the following trick to own the vehicle. During "The Wrap Up" mission, you will be given access to a Canins Mesa to escape a shootout. However, do not drive it on the road. Take a left down the hill to another road. There will be a helicopter chasing you, but you should be able to outrun it. You need to reach Michael's four vehicle garage. Park the Canins Mesa in the garage, and then use a different vehicle to complete "The Wrap Up" mission. Once the Canins Mesa has been saved, you can also modify it.