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Re: engaging 4wd
Is your system push button or is it floor shifted. GM's Instatrac System is an on the fly system for 4wheel hi, and 2wheel hi. To shift into 4wheel low you want to be neutral and you want to move the lever in a quick smooth motion. When shifting to 4wheel low the gear ratios are lowered significantly and if you shift the lever too slowly you will wear the transfer case out. Also GM's Instatrac system is NOT to be used on dry pavement, or sturdy ground. Instatrac is a part-time 4wd system so all four wheels always spin at the same speed. If you engage it on pavement while turning you will basically twist up your driveline. Sometimes you actually get better traction in the snow in two wheel drive. You should only use 4wd when you're stuck.
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