There are a number of reasons why a Chevrolet Tahoe may be difficult to start when the engine is hot. Here are some straightforward suggestions that could fix the problem. If these suggestions fail, the problem could be related to the fuel or ignition systems. This is even more likely if the "Service Engine Soon" light is illuminated on the instrument panel. Take the vehicle to a dealer service department or professional repair shop. They will be able to discover the nature of the malfunction by connecting a scanner tool to the Tahoe's On-Board Diagnostic system.
Locate the air filter housing: a black plastic box mounted to the inner fender-wall on the passenger side of the engine compartment.
Loosen the screws on top of the housing cover then lift the cover off. Remove the filter element from the housing.
Clean the inside of the housing with a rag and then install a new filter element into the housing. Replace the cover and install the retaining screws.
Start and run the engine to check if the problem is solved.
Set the emergency brake and chock the front wheels. Raise the rear of the Tahoe with a jack, and then lower it securely onto jack stands.
Locate the EVAP canister next to the fuel tank underneath the driver's side of the Tahoe.
Squeeze the retainers on the large hose attached to the canister together, then pull the hose off the pipe. Remove the smaller hose by pushing the locking tab in and pulling the hose off the pipe.
Remove the mounting bolt from the retaining bracket with a socket wrench and then lift the canister off.
Install a new EVAP canister onto the bracket and tighten the mounting bolt. Push both hoses onto the pipe fittings, and snap the retainer tabs into place.
Start and run the engine to check if the problem is solved.
