Tow/Haul Mode

[Huck]

The one thing you can depend on is for the little wire that runs from the transmission selector stauk switch to break and the "tow haul" stops working. You can take the steering column cover off and re-splice the wires but they are fine with a heavy plastic cover that just breaks them over time. My 2000 Z71 with 150,000 miles runs super with the exception of the transmission which needed the throttle body reworked. I upgraded to Mobil 1 DEXTRON trans fluid at the recommendation of the trans shop and also installed a trans coolent temp gauge which is a big help in telling what is happening. Check out GM-trucks.com there is a lot of interesting information in there for you to consider.