gmc Workshop Repair Guides

GMC Workshop Service and Repair Manuals

77-65-27 > < Fuel - White Smoke, Rough Idle, Poor Throttle Response
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the updated calibration if the current vehicle calibration is not the newest one listed in your terminal. Refer to the appropriate service manual or Techline
users guide for detailed instructions on the reprogramming procedure.

Warranty Information

For vehicles repaired under warranty, use:

Labor Operation

Description

Labor Time    

J6355

Reprogramming

Use published labor operation time

PROM

77-65-27 > < Fuel - White Smoke, Rough Idle, Poor Throttle Response