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2001 Chevrolet Tahoe LT 5.3L Knocking/Severe Ping
Posted to GM Driveability on 9/3/2009 12 Replies

when vehicle is started and idling with a/c on in gear. severe knock/pinging occurs. with out a/c on, condition is not [...] speed is correct. acts like its loading up when a/c is on and if you raise idle speed slightly with gas pedal, condition goes away. if ...

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car Vehicle Data

2001 Chevrolet Tahoe LT

VIN 1GNEC13T71
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / gas
EmissionsOBD-II Compliant
SymptomsKnocking/Severe Ping
OccursAlways, With A/C on at Idle
Message Closed

car Vehicle Data

2001 Chevrolet Tahoe LT

VIN 1GNEC13T71
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / gas
EmissionsOBD-II Compliant
SymptomsKnocking/Severe Ping
OccursAlways, With A/C on at Idle