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2000 GMC Sierra 1500 SLT 5.3L Misfire
Posted to GM Driveability on 10/15/2010 11 Replies

Can in with engine light on (was flashing previously but not now). Road tested and light misfire under load at 2500+ rpm's.

Fault code p0300 and misfires on #5 and #8 cylinders but only at 2500 rpm or more. Truck runs fine. good power, highway drive is fine, ...

11 Replies Received (View Replies)

  Related Documents & Media  2000 GMC Sierra 1500 SLT

 
Message Closed w/FIX

car Vehicle Data

2000 GMC Sierra 1500 SLT

VIN 1GTEK19T1Y
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
Misc.4WD

Trouble Codes

P0300Multiple Misfire Detected
Message Closed w/FIX

car Vehicle Data

2000 GMC Sierra 1500 SLT

VIN 1GTEK19T1Y
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMisfire
Misc.4WD

Trouble Codes

P0300Multiple Misfire Detected