03 sierra1500 sle 4x4 5.3 haveing 4x4 problems

Asked by Nov 17, 2013 at 08:07 PM about the 2003 GMC Sierra 1500 SLE 4WD Extended Cab SB

Question type: Maintenance & Repair

my truck is shifting real hard and when i put it in 4x4 it feel like the rear end is binding and
it starts glunking real bad and ever since that started its been running real rich then my
check engine light will start flashing i was thinking the tps HELP !!!!!!!

1 Answer

106,065

A flashing check engine light is not good. I would advice you not to drive it while the light is flashing. Get a code reader and read your check engine codes. This will help steer us in the right direction toward the issues you are having.

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