1993 GMC Suburban Owner's Manual - Page 96

M (Neutral):Shift to thissettingonlywhenyourvehicleneeds whenusingapowertakeoff. to betowedor 4L (Low):Thissettingalsoengagesyourfrontaxletogiveyouextratraction, slippery surfaces. but should be used only for off-road or on extremely You canshiftfrom2H to 4H orfrom 4H to 2H whilethevehicle is moving. Yourfrontaxlewillengagefaster if you take your foot off of the accelerator forafewsecondsafteryoushift. Inextremelycoldweather it maybe necessary to stop or slow the vehicle to shift out of 2H. To shift into or out of 4L or M (Neutral): 1. Slow thevehicletoaroll,about3mph transmissionintoneutral. (5 km/h)andshiftyour 2. Shiftthetransfercaseshiftleverinonecontinuousmotion. Don'tpausein N (Neutral)asyoushiftthetransfercaseinto gearscouldclash. 4L, oryour Rememberthatdrivingin 4W or 4b mayreducefueleconomy. Also, driving in four-wheel drive on dry pavementcouldcauseyourtirestowearfasterand makeyourtransfercasehardertoshift. Front Axle Locking Feature Thefrontaxlelocksandunlocksautomaticallywhenyoushiftthetransfer If theoutside case. A slightdelayfortheaxletolockorunlockisnormal. temperature is veryhot,orthevehiclehasbeenusedunderharddriving conditions,theremaybeaslightdelayfortheaxletounlock. 2-32