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International Automotive Technicians Network
2002 Chevrolet Trailblazer LS 4.2L Engine
Posted to GM Engine on 6/11/2009 9 Replies

Hello all. I am working on an 02 trailblazer with a 4.2l I6. When you first start vehicle in morning or any time after vehicle sits for a while engine makes a knocking sound. seems to idle smooth and run fine. after it warms up or runs 3-5min noise goes comple...

9 Replies Received (View Replies)

  Related Documents & Media  2002 Chevrolet Trailblazer LS

 
Message Closed w/FIX

car Vehicle Data

2002 Chevrolet Trailblazer LS

VIN 1GNDT13S42
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
AffectedEngine
ConditionsKnock When Cold
Message Closed w/FIX

car Vehicle Data

2002 Chevrolet Trailblazer LS

VIN 1GNDT13S42
Engine4.2 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
AffectedEngine
ConditionsKnock When Cold