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Sierra

The transmission in your truck has the updated 4L60 series with a heavier duty forward gears and thrust bearings so your transmission problem is most likely the torque converter or front pump failure. The clutch materials in an automatic transmission...

Since you are getting a misfire code on the #4 cylinder that will cause the computer to shut off these other systems. The misfire needs to be fixed first. Most of the time when this comes up it is caused...

Currently, the technicians working with YourMechanic.com do not resurface brake rotors. The main reason for this is that, in order to perform a quality brake job, it is best to completely replace the rotors than it is to just resurface...

You are not alone in having issues with plastic parts of the interior or exterior of GM vehicles. The cracks in your dash panel and door handles breaking are common and no recalls were found for any of the trim...

Your Body Control Module (BCM) controls the headlights on your truck. According to GMC your headlights meet all safety standards; however they have a technical service bulletin (TSB) that may pertain to your situation. The TSB number PIT5374 dated February...

The check engine light comes on and stays on if the onboard computer sees a problem that could cause an increase in emissions or a problem with its systems. After looking at most of the possible codes or issues that...

Hello there, a few different faults could cause the vehicle to shift poorly. The most common would be low transmission fluid level (https://www.yourmechanic.com/services/transmission-fluid-service), a shift solenoid (https://www.yourmechanic.com/services/downshift-solenoid-replacement), transmission linkage damaged, or a transmission range sensor (https://www.yourmechanic.com/services/transmission-position-sensor-switch-replacement). Always the first thing...

There are several water leak issues that pertain to your truck and are addressed under technical service bulletin (TSB) 09-08-57-002D dated 02/04/2013. The TSB covers 12 different water leak repairs to the sun roof, windshield, third brake light, under seats,...

Your truck is using excessive oil in my opinion. GMC has oil consumption ongoing issues for your year truck and most engines they equipped them with. I would recommend getting an oil consumption test to document the exact amount of...