2003 Chevrolet Avalanche 2500 Questions

All 2003 Chevrolet Avalanche 2500 Questions

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I have taken the time to check the grounding the fluid and the connections. It still will not shift into 4 wheel drive. If I stop and put it in nutural I can get the 4 low to engage but the 2 wheel light up as well. v...
my 2003 avalanche keeps going dead every few days i have put in a new battery and i am still having the same problems any ideas on how to fix this
Hi there: How should i know if the previous owner performed a modification on the computer´s program in order to gain gas mileage or to achive some more power ? He instaled big tires on it, I´ll aprecite your ad...