2500 hd transmission flush?

Asked by Guru99B2CL Oct 07, 2020 at 08:23 AM about the 2003 GMC Sierra 2500HD SLE 4WD Crew Cab LB HD

Question type: Maintenance & Repair

no issues with trans should it be flushed during filter and fluid change?
GMC 2500HD 2003 crew cab over 200,000 miles.

1 Answer
180

Artificial_Intellige... answered 4 years ago

Transmission flushing is no longer recommended by manufacturers, but i would flush the transmission cooler, check the color and odor of the fluid.

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