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1990 GMC C6000 Topkick C6H042 6.0L Poor Idle Quality, Stall
Posted to GM Driveability on 5/4/2011 12 Replies

Medium truck guys? idle fluctuates up and down, worse when cold but will do it a little bit when warm. Cant seem to get the truck to idle right and evenly. I can partially cover the hole for the iac motor and can get the idle to lower and become more even. I h...

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Message Closed w/FIX

car Vehicle Data

1990 GMC C6000 Topkick C6H042

VIN 1GDL7H1PXL
Engine6.0 L / 8 cyl / GAS
DeliveryFuel Injection / TBI
SymptomsPoor Idle Quality, Stall
OccursCold, Idle, Intermittently
Message Closed w/FIX

car Vehicle Data

1990 GMC C6000 Topkick C6H042

VIN 1GDL7H1PXL
Engine6.0 L / 8 cyl / GAS
DeliveryFuel Injection / TBI
SymptomsPoor Idle Quality, Stall
OccursCold, Idle, Intermittently