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2004 Chevrolet Express 2500 LS 6.0L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 6/24/2009 13 Replies

Hi group this van starts up and idles great when cold but after it idles hot, the engine starts to miss and the check engine light flashes (p0300) if you brake toqure the engine in drive the miss goes away and the check engine light stops flashing (turns off) ...

FIX posted 8/2/2009

13 Replies Received (View Replies)

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car Vehicle Data

2004 Chevrolet Express 2500 LS

VIN 1GAGG25U84
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursHot, Idle

Trouble Codes

P0300Multiple Misfire Detected