Mechanics

CAN'T CLIMB HILLS

2002 GMC Safari • 6 cylinder 2WD Automatic • 195,000 miles

2002 GMC Safari lacks power going up hills. Have to run in 3rd gear and some times in 2nd
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Aldan
July 17, 2011.



Hesitation: Could be one of the following below -check and test: Oxygen sensors.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note: If it doesn't apply disregard.

Rasmataz
Aug 11, 2011.