Where is the gas filter located-1999 gmc suburban?

The charcoal canister (often mistakenly called a gas filter) on a 1999 GMC Suburban is typically located underneath the vehicle, near the fuel tank. It's usually attached to the frame or suspension components. It's a cylindrical container with various hoses connected to it.

However, there isn't a "gas filter" in the same way a car has an air filter for the engine or a cabin air filter. The charcoal canister is for evaporative emissions control, not fuel filtration. If you're having problems with your fuel system, you'll likely need to check the fuel filter, which is located on the fuel line, usually near the fuel pump. Its location can vary slightly depending on engine type, but it's usually closer to the engine compartment. A repair manual specific to your Suburban's engine would be the best resource for pinpointing the fuel filter's precise location.