Hesitation, Sag, Stumble. Chevrolet Chevy Suburban

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 1996 🢒 Chevy Suburban - 4WD 🢒 Engine 🢒 Engine Controls - 6.5L 🢒 Hesitation, Sag, Stumble

Checks

Action

Definition: The vehicle has a momentary lack of response when pushing down on the accelerator. The condition can occur at any vehicle speed. The condition is usually most severe when trying to make the vehicle move, as from a stop sign. The condition may cause the engine to stall if it's severe enough.

Preliminary Check

Refer to Important Preliminary Checks.

Fuel System Checks

•	Check the fuel pressure. Refer toTable A-5 in Control Module Systems.

•	Check for water contamination in the fuel. Refer to Fuel Systems.

•	Perform the Injector Balance Test. Refer to Fuel Systems.

•	Check for low fuel pressure after a cold start or during moderate or full throttle acceleration. If fuel pressure drops below specification, there is possibly a faulty fuel pump or a restriction in the fuel system. Refer to Fuel Systems.

Additional Checks

•	Check the Service Bulletins for control module software updates.

•	Check the generator output voltage.