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2003 GMC Sierra 2500 6.0L 1-2 Shift
Posted to GM Transmission on 7/6/2010 4 Replies

After driving for 15-20 minutes the truck will start out in 2nd gear for a split second then shift down to 1st gear. Fluid is nice and clean (even before valve body removal) the 1-2 shift solenoid is on and the 2-3 shift solenoid is off when this happens, whic...

4 Replies Received (View Replies)

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car Vehicle Data

2003 GMC Sierra 2500

VIN 1GTHK29U23
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
Affected1-2 Shift
ConditionsShift
Message Closed

car Vehicle Data

2003 GMC Sierra 2500

VIN 1GTHK29U23
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
Affected1-2 Shift
ConditionsShift