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2008 GMC Envoy Denali 5.3L Hesitation
Posted to GM Driveability on 1/12/2012 12 Replies

Truck was brought in for lack of power. After road test it seems to have a flat spot at times. Not always. No codes found.

Feels like bad cats when it happens but if you give it more gas power will come back.

Checked fuel pressure ok, checked back pressure 1...

12 Replies Received (View Replies)

  Related Documents & Media  2008 GMC Envoy Denali

 
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car Vehicle Data

2008 GMC Envoy Denali

VIN 1GKET63M78
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsHesitation
OccursAlways
Message Closed

car Vehicle Data

2008 GMC Envoy Denali

VIN 1GKET63M78
Engine5.3 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsHesitation
OccursAlways