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2008 Chevrolet Avalanche LS 5.3L Compression
Posted to GM Engine on 5/25/2026 11 Replies

hello everyone! this truck came in with severe misfire on cylinder 1 pull spark plug fund it wet, ran compression test found it 25 pound ran a leak down test pass 100 no leak , pull valve cover turn engine by hand found intake push rod not moving up left c...

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car Vehicle Data

2008 Chevrolet Avalanche LS

VIN 3GNFK12368
Engine5.3 L / 8 cyl / FLEX
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedCompression
Open Help Request

car Vehicle Data

2008 Chevrolet Avalanche LS

VIN 3GNFK12368
Engine5.3 L / 8 cyl / FLEX
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
AffectedCompression